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1.
A novel comb‐like polysiloxane (QPEPS) bearing dimethyldodecyl quaternary ammonium polyether groups (QPEs) was synthesized by reaction of epoxy polyether polysiloxane, which was prepared from polymethylhydrosiloxane (PHMS) and allyl polyether epoxy (APEE500) via hydrosilylation, with N,N‐dimethyldodecylamine (DMDA) in the presence of acetic acid (HAc). Chemical structure, film morphology, and performance of the synthesized polysiloxane on cotton and its mimic substrates were investigated by Fourier transform infrared spectrum, nuclear magnetic resonance spectrum, field emission scanning electron microscopy, atomic force microscopy, and so on. As expected, the QPEPS was easily emulsified into a clear, uniform micro‐emulsion with a mean size of about 20 nm. Since the presence of a large number of cationic QPEs pendant in the side chains, the QPEPS exhibited microscopic inhomogeneous morphology with many pinnacles projected on the film surface. As a result, the root mean square roughness (Rq) of the QPEPS film reached 0.615 nm in 2 µm × 2 µm scanning field and the largest height of the pinnacles achieved 7.618 nm. And under the influence of the QPEs, the QPEPS provided the treated fabrics with not only very soft handle, but also excellent hygroscopicity. And the wettability of the treated fabrics reached 1–3 s. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40612.  相似文献   

2.
We synthesized a novel cationic fluorinated polyacrylate latex (FLDH) with pendant long chain alkyl by copolymerization of perfluoroalkyl ethyl acrylate, lauryl methacrylate, dimethylaminoethyl methacrylate, and 2‐hydroxypropyl acrylate. FTIR, 1H‐NMR, TEM, DSC, and TGA were used to characterize the as‐prepared FLDH. Then fine morphology, components, and hydrophobicity of films on silicon wafer and cotton substrates were investigated by scanning electron microscope, field emission scanning electronic microscope, atomic force microscope, X‐ray photoelectron spectroscopy (XPS), contact angle meter, etc. Results showed that the FLDH particles had quasi‐spherical core‐shell structure with an average diameter of 144 nm. The core‐shell FLDH film thus had two Tg and its thermal property was improved compared to fluorine‐free acrylate latex. FLDH could form a film on both the cotton fiber and silicon wafer substrate. At an amplification of <60,000 (of the original fiber) and the observation rule (working distance) of >100 nm, FLDH showed a smooth resin film on the treated fabric/fiber surface. However, as the observation rule decreased to 2 nm‐almost a molecular lever‐the FLDH film mostly exhibited an inhomogeneous structure and uneven morphology in its atomic force microscope images. There were many low or high peaks in FLDH topography. Consequently, in 5 μm2 scanning field, the root mean square roughness of FLDH film reached to 0.506 nm. XPS analysis indicated the perfluoroalkyl groups had the tendency to enrich at the surface. In addition, water contact angle of the treated fabric could attain 146.2°. FLDH do not influence whiteness of the treated fabric but will make it slightly stiff at high doses. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci., 2013  相似文献   

3.
We prepared and characterized active, oxygen‐scavenging, low density polyethylene (LDPE) films from a non‐metallic‐based oxygen scavenging system (OSS) containing 1, 3, 5, 10, and 20% of gallic acid (GA) and potassium chloride (PC). We compared the surface morphology and mechanical, permeability, and optical properties of the oxygen‐scavenging LDPE film with those of pure LDPE film. The surface morphology, gas barrier, and thermal properties indicate that the OSS was well incorporated into the LDPE film structure. The surface roughness of the film increased with the amount of oxygen scavenging material. The oxygen and water vapor permeability of the developed film also increased with the amount of oxygen scavenging material, though its elongation decreased. The oxygen scavenging capability of the prepared film was analyzed at different temperatures. The initial oxygen content (%) in the vial headspace, 20.90%, decreased to 16.6% at 4 °C, 14.6% at 23 °C, and 12.7% at 50 °C after 7 days of storage with the film containing 20% OSS. The film impregnated with 20% organic oxygen scavenging material showed an effective oxygen scavenging capacity of 0.709 mL/cm2 at 23 °C. Relative humidity triggered the oxygen scavenging reaction. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 44138.  相似文献   

4.
In this article, a series of sustainable polyurethanes are prepared by introducing different content of cyclic polysilanol, which may act as a chain extender to replace 1, 4‐butanediol (BDO). Consequently, cyclic polysiloxanes are successfully incorporated into the molecular chains to afford organic–inorganic polyurethanes and then their effects on polyurethanes thermal properties and surface hydrophilicity are fully characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and contact angle testing. Results show that the hybrid polyurethanes display enhanced glass transition temperatures (Tg). While in terms of TGA, the effects of cyclic polysilanol on thermal properties seem complex, which would reduce the thermal stability in the first degradation process but enhance in the second process. The morphology observed by scanning electron microscopy (SEM) show that the inorganic constitutions, namely, cyclic polysilanol, may occur to self‐condensation or aggregation, which can help to explain the uncommon thermal phenomenon above. Thus, an opportunity of future applicability in the areas of sustainable polymer with improved properties can be envisioned in our research method of hybrid polyurethanes. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 41277.  相似文献   

5.
A novel antibacterial fiber named ethyltriphenylphosphonium bromide‐polyacrylonitrile fiber (ETPB‐PANF) was synthesized by chemical modification of PANF reacted with ETPB. The PANF was first immersed in NaOH solution to get Na‐PANF with ? COONa groups. Na‐PANF was then reacted with ETPB to get the final fiber. During the process of synthesis, this article investigated on the initial concentration of ETPB, the contact time, the reaction temperature, and the pH of the solution that may have effect on the properties of ETPB‐PANF. ETPB‐PANF was characterized by Fourier transform infrared spectroscopy, thermo gravimetric analyzer, scanning electron microscope, and X‐ray photoelectron spectroscopy, and the releasing amount of ETPB from ETPB‐PANF was examined by inductively coupled plasma atomic emission spectrometry. The antibacterial activity of ETPB‐PANF was examined against Escherichia coli and Staphylococci aureus by improved shake flask method in sterile saline. The results showed that organophorsphor functional groups have been successfully grafted on PANF, and ETPB‐PANF showed good antibacterial abilities for E. coli and S. aureus. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40935.  相似文献   

6.
A novel cationic fluorinated polyacrylate emulsion (CFBDH) was prepared by polymerization of dodecafluoroheptyl methacrylate (DFMA) with butyl acrylate (BA), dimethylaminoethyl methacrylate (DM), and 2-hydroxypropyl acrylate (HpA) via seeded emulsion polymerization. Chemical structure, particle morphology, glass transition temperature, and thermal property of resultant CFBDH were characterized by FTIR, 1H-NMR, TEM, DSC, and TGA, respectively. The as-synthesized product was utilized to treat the clean glass sheet and cotton fabric substrates, then morphology, components, hydrophobicity, and other performances of films on those substrates were investigated by SEM, AFM, XPS, and contact angle meter, etc. Results show that the target product possesses anticipative structure and its latex particles have uniform spherical core-shell structure with an average diameter of 126 nm. The core-shell CFBDH latex film thus has two Tg and its thermal property has been improved due to the introduction of fluorine-containing acrylate monomer. The CFBDH film on cotton fabric surface seems to be smooth compared to the blank by SEM. However, the CFBDH film on silicon-wafer is inhomogeneous and has many low or high peaks. At 2 nm data scale and in 1 μm2 scanning field, the root mean square roughness of CFBDH film reaches to 0.205 nm. XPS analysis indicates the perfluoroalkyl groups have the tendency to enrich at the film-air interface. In addition, CFBDH can provide good hydrophobicity for the treated fabric and do not influence whiteness of the treated fabric indeed. However it will make the treated fabric slightly stiff at high doses. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012  相似文献   

7.
2‐Amino‐2‐methyl‐1‐propanol (AMP) was coated onto cotton fabric with 1,2,3,4‐butanetetracarboxylic acid (BTCA) as a crosslinking agent to simultaneously impart antimicrobial and durable‐press functionalities. The coatings were characterized and confirmed by attenuated total reflectance–IR and thermogravimetric analysis. The coated fabrics were rendered biocidal upon exposure to dilute household bleach, and the chlorinated swatches exhibited about 6 log reductions of Escherichia coli O157:H7 and Staphylococcus aureus within 5 min of contact time. A concentration of 1.5 wt % AMP was sufficient to produce this biocidal efficacy. Increasing the BTCA content of the coating improved the wrinkle recovery angle. The coatings were very stable toward repeated laundering, and they exhibited sufficient halogen storage stabilities for industrial applications. A photolytic decomposition was observed when the coatings were exposed to UVA light. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012  相似文献   

8.
A novel functional polysiloxane (PSBP) bearing benzophenone derivatives as UV absorbing side groups was synthesized by hydrosilylation of polyhydromethylsiloxane (PHMS) with 2‐hydroxy‐4‐(β‐hydroxy‐γ‐allyloxy)propyloxy benzophenone (HHAPB). The chemical structure, film morphology, and the softening fabric property of the synthesized polysiloxane were characterized and investigated by spectrum analysis, atomic force microscope (AFM), and Kawabata evaluation system. The experiment results indicated that PSBP was not only an excellent polymeric UV‐absorber, which showed intensive ultraviolet absorptions respectively, at wavelengths of 243.2, 288.2, and 325.4 nm, but could exhibit a nonhomogeneous, some rough structure film on silicon wafer substrate. In addition, the functional side group, benzophenone derivative as well as its mass ratio to PSBP has an influence on the performance of the synthesized polysiloxane. As the mass ratio decreased from 31.48 to 12.87%, the molar extinction coefficients εmaxmax = 288.2 nm) of the PSBP fluids lowered from 3.4564 × 105 to 1.5763 × 105, but while the softening fabric properties of PSBP on cotton fabrics increased. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 680–687, 2007  相似文献   

9.
A spiropyran (SP)/polydimethylsiloxane (PDMS) composite film was prepared in this study, and its ultraviolet–visible/fluorescence behaviors under acid vapors were investigated. With UV irradiation, the ring‐closed SP in the PDMS matrix transformed to a ring‐opened merocyanine, which contained phenolate oxygen and could be further protonated by the hydrogen offered by the acid vapor. Such a protonation process endowed the composite film with not only an obvious color change from purple to yellow but also a strong fluorescent emission. As a result, some common volatile acids, hydrochloric acid, hydrofluoric acid, nitric acid, trifluoroacetic acid, formic acid, acetic acid, and propionic acid, could be distinguished with this method either via color or fluorescent emission. Meanwhile, the film showed good recyclability during the processes of irradiation and protonation. The method, therefore, displayed good processing in real time and was fast and recyclable; this makes it suitable as an alternative for applications related to environmental and safety monitoring of acid vapors. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 45199.  相似文献   

10.
Nanofibers of natural cotton cellulose with a degree of polymerization above 10,000 were prepared by electrospinning; they were then functionalized with a rare‐earth nano‐oxide material of cerium dioxide (CeO2) by means of the hydrothermal method to obtain the designated properties. The morphology, structure, and properties of the as‐obtained nanocomposite fibers were characterized by scanning electron microscopy, transmission electron microscopy, energy‐dispersive spectroscopy, X‐ray diffraction, Fourier transform infrared spectroscopy, and ultraviolet (UV)–visible spectrophotometry. The results show that hydrothermally grown CeO2 nanoparticles exhibited a polycrystalline cubic fluorite structure and could be dispersed uniformly on the surface of the cellulose nanofiber. The strong interface and electrostatic interactions between the nanoparticles and nanofibers effectively prevented nanoparticle fall‐off. The modified natural cotton cellulose nanofibers showed excellent protection against UV radiation because of the function of the CeO2 particles. Such cellulose nanocomposite materials could have potential applications in UV protection for data‐storage or memory devices. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 1524–1529, 2013  相似文献   

11.
An acid‐dye‐dyeable polyacrylonitrile/poly (N,N‐dilkylaminoethylacrylate) blend fiber was prepared. On the basis of research for the dye uptake, color strength, tensile strength, and breaking elongation of the polyacrylonitrile/poly (N,N‐dilkylaminoethylacrylate) blend fiber, it was found that the blend fiber and its fabrics for acid dyes possessed favorable dyeability and mechanical properties. The effect of the polyacrylonitrile ratio on the blend fiber was examined. The optimum dyeing‐process parameters were determined. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007  相似文献   

12.
通过氨基硅烷、十二烷基硅烷与D4的聚合反应制得了中间体氪基/十二烷基改性聚二甲基硅氧烷(RASO),利用RA-SO与马来酐的开环反应制得一种新型织物整理剂羧基/十二烷基改性聚二甲基硅氧烷(RCAS),并对其结构及膜形貌进行了表征.结果表明RCAS形成微观形态学非均一结构的硅膜,其膜形貌主要由不清晰的连续相与竖直的尖峰构成,在1μm<'2>的扫描范围内,RCAS所形成的硅膜的均方粗糙度为0.583 nm,远远大于ASO-1硅膜的均方粗糙度(0.072 nm).RCAS整理前后织物柔软性有了明显改变,虽然织物的柔软性仍不及ASO-1所整理的织物,但是织物的吸湿性明显提高,而且有效抑制了氨基硅整理织物时所引起的热泛黄性.  相似文献   

13.
The drying kinetics and bulk morphology of pigmented latex films obtained from poly(n‐butyl methacrylate‐con‐butyl acrylate) latex particles functionalized with carboxyl groups and ground calcium carbonate blends were studied. Latex/pigment blends with higher carboxyl group coverage on the latex particle surfaces dried faster than films with few or no carboxyl groups present. The latex/pigment dispersions also dried faster when there was more stabilizer present in the blend system because of the hydrophilic nature of the stabilizer. The net effect of increasing the pigment volume concentration in the blend system was to shorten the drying time. The bulk morphologies of the freeze‐fractured surfaces of the pigmented latex films were studied with scanning electron microscopy. Scanning electron microscopy analysis showed that increased surface coverage of carboxyl groups on the latex particles in the latex/pigment blends resulted in the formation of smaller pigment aggregates with a more uniform size distribution in the blend films. In addition, the use of smaller latex particles in the blends reduced the ground calcium carbonate pigment aggregate size in the resulting films. Scanning electron microscopy analysis also showed that when the initial stabilizer coverage on the latex particles was equal to 18%, smaller aggregates of ground calcium carbonate were distributed within the copolymer matrix of the blend films in comparison with the cases for which the initial stabilizer coverage on the latex particles was 8 or 36%. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 2267–2277, 2006  相似文献   

14.
In order to improve the compatibility between natural fibers and polypropylene (PP) and polypropylene‐ethylene propylene diene terpolymer (PP‐EPDM) blends, the functionalization of both matrices with maleic anhydride (MA) is investigated in this study. The morphological observations carried out by scanning electron microscopy show that the incorporation of small amounts of functionalized polymer considerably improves the adhesion at the fiber‐matrix interface. In these cases, the fibers are perfectly embedded in the matrix in relation to the composites prepared with the pure homopolymers, and a significant increase in the composite strength is also observed, particularly, after the incorporation of both modified polymers (MAPP and MAEPDM). Thus, it is possible to correlate better interfacial adhesion with the improvement of mechanical properties. It is assumed that the functionalization of the matrix reduces interfacial stress concentrations and may prevent fiber‐fiber interactions, which are responsible for premature composite failure. The crystallization kinetics of PP were also analyzed by differential scanning calorimetry (DSC). It was observed that both flax fiber and rubber behave as effective nucleant agents, accelerating PP crystallization. Moreover, these results are particularly relevant when the grafted matrices are added to the composite. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 2170–2178, 2003  相似文献   

15.
Postmodified polyacrylonitrile (PAN) microfibers/nanofibers with durable antibacterial performance was fabricated by a rapid and green method of microwave irradiation and electrospinning technologies. The fibers were endowed with antibacterial activity because of silver ions, which were embedded into PAN by nitrile click chemistry with microwave irradiation; they were then electrospun into neat and smooth microfibers/nanofibers. The obtained microfibers/nanofibers were tested against Staphylococcus aureus and exhibited powerful and long‐lasting antibacterial properties. The production of endurable antibacterial materials could effectively prevent the spread of microbes and beautify the living environment. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 45490.  相似文献   

16.
Proper dispersion should be guaranteed when using carbon nanotubes (CNTs) as effective absorbents. Physical dispersion methods, such as mechanical mixing, ball milling, and calendering process (three‐roll milling), were adopted to disperse CNTs in the bismaleimide matrix to foam. The effects of the dispersion methods on viscosity, bubble morphology, and microwave‐absorbing properties at 12–18 GHz were studied. The results indicated that, three‐roll milling can more efficiently separate individual CNTs from the agglomerates compared with the other two methods. This method exhibited the highest viscosity, the most irregular cell shape, and the best microwave‐absorbing property. The effects of CNT concentration and foam thickness on the microwave‐absorbing properties were also studied. The reflectivity decreased and the position of the reflectivity peak moved to a lower value with increase in CNT concentration and foam thickness. The foam with 30 mm thickness achieved a reflection loss below ?8 dB over 3.0 GHz in the range of 13.5–16.5 GHz. The minimum value is ?14.2 dB at 14.6 GHz. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40233.  相似文献   

17.
Aiming at good thickening ability and temperature resistance in water‐based drilling fluid, a novel copolymer viscosifier (SDKP) of sodium 2‐acrylamido‐2‐methylpropane sulfonate (NaAMPS) with N‐vinylcaprolactam (NVCL) and cross‐linking divinylbenzene (DVB) was prepared by micellar radical polymerization. The composition and molecular structure of optimal SDKP under the optimum reaction conditions was characterized by FT‐IR, 1H‐NMR, and elemental analysis, and the molecular weight was determined by GPC. Thermal gravimetric analysis showed that the SDKP was even stable when the temperature was not higher than 330 °C. The performance of SDKP as viscosifier for aqueous, brines, and saturated brine bentonite drilling fluid was evaluated before and after aging tests at 230 °C for 16 h. The evaluation results indicated that the SDKP had excellent thickening ability, thermal resistant, and salt tolerance. HTHP rheology test showed that the SDKP containing drilling fluids displayed a thermo‐thickening effect in temperature range of 150 to 180 °C, which was beneficial to increase the viscosity and strength of fluids at high temperatures. Shear test showed that the SDKP illustrated a similar shear thinning to xanthan gum. ESEM observations demonstrated that the continuous three‐dimensional network was formed in the SDKP aqueous and brines solution, which was probably the main reason for its excellent thickening properties. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 44140.  相似文献   

18.
The pulse galvanostatic method (PGM) and galvanostatic method (GM) were used to electrodeposit polyaniline (PANI) in H2SO4 solutions. Scanning electron microscopy studies showed that PANI prepared with GM had a granular morphology similar to other researchers' results, whereas nanofibular PANI was prepared with PGM. Furthermore, the relationship between the synthetic conditions and morphology of PANI electrodeposited by PGM was investigated. Under some preparation conditions (i.e., mean current density of PGM = 1–4 mA cm?2, ratio of the on‐pulse period to the off‐pulse period = 0.25–10, temperature = 10–30°C, and experimental frequency = 10–1000 Hz), nanofibular PANI was obtained, whereas flake PANI or granular PANI was prepared under other conditions. Nanosize PANI could result from the highly polarized current of the pulse current signal. The appropriate pulse peak current during the on‐pulse period not only produced high electrochemical polarization but also did not lead to overoxidation of PANI; meanwhile, the monomer at the electrode/solution interface could be sufficiently supplied during the off‐pulse period. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94:1389–1394, 2004  相似文献   

19.
In this study, a series of poly(styrene‐co‐vinyl phosphonic acid) [P(S‐co‐VPA)] copolymers were synthesized by the free‐radical copolymerization of styrene and vinyl dimethyl phosphonate followed by alkaline hydrolysis. The P(S‐co‐VPA) copolymers were characterized by size exclusion chromatography (gel permeation chromatography), Fourier transform infrared vibrational spectroscopy, proton nuclear magnetic resonance, thermogravimetric analysis, differential scanning calorimetry, dynamic mechanical analysis, and electrochemical impedance spectroscopy. Despite the difference between the copolymerization ratios of styrene and vinyl dimethyl phosphonate, the resulting copolymers presented single glass transitions at temperatures that depended on the acidic group amount. The glass transition shifted to a higher temperature and became broader as the amount of phosphonic acid increased. The storage modulus at temperatures higher than the glass transition also increased with increasing acidic groups because of intramolecular and intermolecular interactions. All of the acid copolymers were thermally stable to at least 300°C. A high oxidative stability was found for 3 : 1 P(S‐co‐VPA), which also presented conductivity values on the order of 10−6 Ω−1 cm−1 at room temperature. The 1 : 1 P(S‐co‐VPA) membrane presented Arrhenius‐type behavior at temperatures from 30 to 80°C and conductivity on the order of 10−5 Ω−1 cm−1. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011  相似文献   

20.
It is important to evaluate the influence of textile finishing using the polymer resins on the color of dyed fabrics. In this article, three functional polysiloxanes modified with different organic groups were used to treat dyed polyester microfiber fabrics. Effects of the polysiloxanes on the color of the dyed polyester were investigated by color yield (K/S), colorimetric data of CIELAB, and the color differences (ΔE). Chemical structures of three functional polysiloxanes were the polysiloxanes with amino groups (polymer A), with perfluorocarbon groups (polymer B), or with quaternary ammonium salts and perfluorocarbon groups (polymer C). Compared with the dyed fabrics treated with the polysiloxane with amino group, the K/S of dyed fabrics treated with the polysiloxane with perfluorocarbon obviously improved. Effects of the polysiloxanes with perfluorocarbon and cationic groups on the color shade of the dyed polyester were noticeable. The fastness had not significantly changed. © 2010 Wiley Periodicals, Inc. Col Res Appl, 2012  相似文献   

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