Preparation and characterization of ZnO/AGE MNPs with aloe gel extract and its application on linen fabric

The main objective of this study was to synthesize Zinc oxide (ZnO) micro/nano-composites with the natural capping agent: aloe gel extract (AGE) instead of traditional chemical capping agent. Therefore, the prepared process is environmentally friendly. Firstly, the AGE was prepared with water extraction, and then samples with AGE (ZnO/AGE MNPs) and without (ZnO) were synthesized under alkaline conditions. The two samples were characterized by UV–visible spectroscopy, Fourier Transform Infrared Spectroscopy, scanning electron microscope, energy dispersive X-ray spectrometer, and X-ray diffraction. Results showed that ZnO/AGE MNPs with smaller particle size were homogeneous and spherical shape crystal and assigned to the ZnO phase (JCPDS 21-1486). Secondly, Linen fabric was treated with ZnO/AGE MNPs, and power of the ultrasonic on UV resistance of linen fabric was investigated. The more advantageous UV resistance property of linen fabric was obtained by ultrasonic treating 30 min at 40 °C under 90 W with 0.8% ZnO/AGE MNPs. The SEM illustrated that there were many micro-nanoparticles on the treated linen fabric surface comparing with the smooth surface of the untreated. After being washed for 20 times, the treated linen fabric was still UV resistance which demonstrated the way preparing ZnO MNPs with AGE.     

The high performances of SiO2-coated melt-blown non-woven fabric for lithium-ion battery separator

This paper reports a kind of composite separator which is prepared by adopting polypropylene melt-blown non-woven fabric as base material, and coating nano-SiO₂ particles on its unilateral side. This paper also observes the morphology of separators and character the pore size, thermal stability, and electrochemical performance of separators. Results show that: filling nano-SiO₂ particles into polypropylene melt-blown non-woven fabric could improve the thermal stability, ionic conductivity, and pore size distribution of polypropylene melt-blown non-woven fabric, especially, the C-rate performance. When the coating solution reaches 15 wt.%, the c-rate performance of separator reaches a higher value of 152 mAh.g^?1 at 0.2 C and 89 mAh.g^?1 at 5 C, which was more excellent than c-rate performance of other composite separators and pp membrane. Such kind of designing used new preparation process and will to be a promising separator for power lithium-ion battery.     

纳米银整理棉织物的制备及其抗菌性能

利用柠檬酸三钠和硝酸银溶液制备纳米Ag整理棉织物,通过X射线衍射仪、扫描电镜和X射线光电子能谱仪对纳米Ag整理棉织物进行表征。考察了柠檬酸三钠与硝酸银物质的量比、温度及浸泡时间对棉织物中Ag质量分数及棉织物抗菌性能的影响。结果表明,棉织物中Ag质量分数和棉织物抗菌性能随着柠檬酸三钠与硝酸银物质的量比的增大先增大后减小,随温度的升高及浸泡时间的延长而增大。当柠檬酸三钠与硝酸银物质的量比为5、温度为80℃、浸泡时间为60 min时,抗菌棉织物对革兰氏阴性菌和革兰氏阳性菌的抑菌圈直径分别达到2.7、2.3 mm。洗涤5次后,纳米Ag整理棉织物仍具有较好的抗菌活性。     

天然栀子黄染色棉织物的防紫外和抗菌性能

利用天然栀子黄对壳聚糖改性棉织物进行染色,研究了时间、栀子黄用量、pH和温度对染色棉织物K/S值的影响,并研究了栀子黄染色壳聚糖改性棉织物的色牢度、防紫外和抗菌性能.结果 表明壳聚糖改性实现了棉织物纤维的阳离子化;栀子黄染色壳聚糖改性棉织物的优化工艺:栀子黄用量8％,pH 5,60 min,40℃;栀子黄染色壳聚糖改性...     

Preparation of a hydrophobic recycled jute-based nonwoven using a titanium dioxide/stearic acid coating

This work aims at developing a hydrophobic treatment for jute fiber-based nonwovens. Three solutions of titanium dioxide (TiO₂) nanoparticles were prepared through a sol–gel method by varying the molar ratio of the various constituents. The nonwoven was pretreated with these solutions before being impregnated with different concentrations of stearic acid. The TiO₂ nanoparticles synthesized are amorphous; their size varies with the concentration of ethanol used as a solvent in the sol–gel method. The nanoparticle coating produced on the jute fibers is uniform. The nonwoven wettability was evaluated by measuring its water contact angle and retention time; the nonwoven became hydrophobic at the lowest fatty acid concentration tested. An increase in the stability of the hydrophobicity was observed when the TiO₂ nanoparticle pretreatment was used compared to the application of the stearic acid treatment only. No detrimental effect of the hydrophobic treatment on the nonwoven mechanical performance and thermal stability was observed. These results demonstrate the potential of the TiO₂ nanoparticle/stearic acid treatment as a fast method to provide a stable hydrophobicity to recycled jute-based nonwovens.     

Investigating the production and properties of Ag/TiO2/PP antibacterial nanocomposite filament yarns

In this research, investigating the possibility of producing, processing and also characterization of antibacterial organic/inorganic nanocomposite polypropylene fiber has been presented. For this purpose, PP powder and inorganic nanocomposite filler were mixed using a twin screw extruder and modified granule was produced. After producing as-spun filament yarns by a pilot plant melt spinning machine at the take-up speed of 2000 m/min, samples were drawn, textured and finally weft knitted. Physical and structural properties of as-spun and drawn yarns with constant and variable draw ratios were investigated. The experimental results revealed that the crystallinity reduction of modified as-spun yarns could be compensated by drawing process. Tensile properties of modified drawn yarns with the variable draw ratio were higher than the pure PP, whereas the inverse observation was noticed in the case of constant draw ratio. The investigation of antimicrobial activity showed a high percentage of biostatic efficiency on the modified samples.     

NiCo2S4/石墨烯/棉织物复合柔性电极的制备及性能

利用水热法制备NiCo₂S₄/石墨烯/棉织物复合柔性电极材料。采用SEM和XRD表征其微观结构,并对其电化学性能进行测试。结果表明,NiCo₂S₄/石墨烯/棉织物复合柔性电极的比电容可达189.6 F/g（0.25 mA/cm²）。复合电极在经过2 000次循环充放电及500次折叠后,电容保留率分别为63.6%、83.1%,展现出优良的循环稳定性和柔软性。     

Fabrication of photochromic,hydrophobic, antibacterial,and ultraviolet-blocking cotton fabric using silica nanoparticles functionalized with a photochromic dye

The aim of this work was the fabrication of cotton fabric with multifunctional properties such as photochromic, hydrophobicity, antibacterial, and ultraviolet (UV) blocking. In this regard, a mixture of silica nanoparticles with spirooxazine as a photochromic dye first applied on the cotton fabric, and then, the fabric surface was coated with an alkylsilane compound. The homogenous distribution of silica and silica/spirooxazine hybrid on the cotton fibers was established by field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray mapping. X-ray diffraction patterns confirmed the amorphous nature of the hybrid on the treated cotton fabric. The photochromic effect of the fabrics was measured after 5-min sunlight irradiation. Other characteristics of treated fabrics, such as antibacterial activity, hydrophobic properties, and UV-blocking activity, were also assessed. The results indicated that adding silica nanoparticles to spirooxazine had a tangible effect on photochromic activity of treated cotton fabrics and its photochromic performance was higher than that of the photochromic dye. The fabric showed stable hydrophobicity with static water contact angle values of 141.2° ± 1°. Moreover, the coated cotton fabric demonstrated proper antibacterial properties and UV-blocking activity.     

Investigation into the performance and mechanism of SiO2 nanoparticles and starch composite films

Nanomaterials are often introduced to improve the properties of polymers. In this article, the effects of SiO₂ nanoparticles with lager specific areas and special microstructural characters on the properties of starch films were investigated. Firstly, the ultrasonic mixing was used to disperse the SiO₂ nanoparticles under different dispersion times, and then the dispersed SiO₂ nanoparticles with various ratios were added into starch size. The effects of the dispersion time and the SiO₂ content on the mechanical properties of the SiO₂/starch composite size were analysed. It was found that the dispersion time and the SiO₂ content had significant effects on the tensile and abrasion behaviour of the nanocomposite films. The mechanism of the enhanced mechanical properties of the composite films was examined by analysing the size of the dispersed SiO₂ nanoparticles in the dispersion, the surface characters of the films and the structures of the fractured surfaces. And the morphology of the abraded surface was analysed by atomic force microscopy, scanning electron microscope and video zoom microscope.     

涤棉织物的拒水拒油和易去污整理

采用不同的拒水拒油整理剂与易去污整理剂复配对涤棉织物进行整理,整理后的涤棉织物同时具有拒水拒油和易去污性能,且耐久性良好。根据小样试验和大样生产结果,推荐最佳工作液配比:TG435 8%,TG995 0.6%,适量交联剂。     

Antibacterial,UV protection,flame retardancy and coloration properties of cotton fabrics coated with polyacrylate polymer containing various iron ores

Incorporation of iron ores as additive in coating polymers to improve certain properties of textile surfaces has recently attracted increasing interest due to their low cost, distinctive characteristic properties, availability, and easy application. On the other hand, the mechanical and multifunctional effects of these ores on textile surfaces after their application via coating have not widely been investigated. In this study, pastes prepared from polyacrylate-based polymers containing iron ores like Hematite, Goethite, and the mixture of Goethite/Limonite/Hematite with different concentrations were coated on the cotton fabric by knife-over-roll method. Subsequently, the antibacterial, UV protection, flame retardancy, and coloration properties together with mechanical properties of the samples were investigated. The characterization of coated textile surfaces was examined by SEM and FT-IR analyses. The mineral contents and mean particle size values of iron ores were also determined with X-ray fluorescence spectrometers with particle size analyzer. It was concluded that cotton fabrics with multifunctional properties such as flame retardancy, UV protection, and antibacterial properties as well as natural coloration could be obtained via iron ore coating along with an abrasion resistance improvement when compared with the untreated cotton fabric.     

Simultaneous dyeing and functional finishing of cotton fabric using reactive dyes doped with TiO2 nano-sol

A new approach for simultaneous salt-free dyeing and functional finishing, i.e. UV protection and antibacterial properties of cotton fabric were studied. In this study, cotton fabric was cationized with 3-chloro-2-hydroxypropyl trimethylammonium chloride. Two types of reactive dyes (CI Reactive red 120 and CI Reactive yellow 145) were doped with different amounts (0.035, 0.053, and 0.07 mol) of TiO₂ nano-sol by sol–gel method and applied on cationized cotton fabric using pad–dry–steam method without the addition of salt. The chemical and morphological structures of the dyed fabrics were characterized by attenuated total reflection-Fourier transform infrared, scanning electron microscopy, transmission electron microscopy, and X-ray diffractometry. Different properties were investigated such as color strength, fixation, fastness properties (washing, rubbing, and light), UV blocking, antibacterial activity, and tensile strength. Samples dyed with titanium dyeing solutions exhibited better antibacterial efficacy and durable UV protection, with minimal impact on color depth and tensile strength compared with the samples dyed with commercial reactive dyes.     

Synthesis and hydrophobic evaluation of the electro-spun nano-TiO2/PET fibrous bats after treatment with an alkaline solution and fluorocarbon material

Superhydrophobicity of a substrate is the result of a low surface energy and proper surface roughness. In the present research, the potential roughening effect of using nano-TiO₂ (NT) in a PET electro-spinning solution followed by an alkaline modification of the synthesized bats was investigated to create appropriate surface roughness while a low surface energy was achieved in owing to a layer of fluorocarbon coating. The results were evaluated via employing FTIR, SEM, digital microscopy, 3 M water repellency, water contact angle, and sliding angle. The best result of hydrophobicity was achieved by the alkaline modified-fluorocarbon coated NT (5.5%)/PET fibrous bat with the 3 M water repellency of 10, contact angle of more than 150° (155.9 ± 0.1°), and sliding angle of less than 10° (6.1 ± 1.9°) due to a multiscale surface roughness obtained by the fibrous bat structure itself, and roughening effect of the NT as well as alkaline solution surface etching.     

Antimicrobial finishing of cotton fabrics based on gamma irradiated carboxymethyl cellulose/poly(vinyl alcohol)/TiO2 nanocomposites

Synthesis of nanoparticles with antibacterial properties is of great interest for the development of textiles finishing, in general, and cotton fabric, in particular. In this work, TiO₂ nanoparticles at different concentrations were synthesized using nitric acid as a reducing and stabilizing agent. Cotton fabrics were first impregnated, to a pick-up of 100%, in colloidal solutions containing carboxymethyl cellulose (CMC)/polyvinyl alcohol(PVA)/TiO₂ nanocomposites. After that, the coated fabrics were exposed to gamma irradiation to produce TiO₂ nanoparticles stabilized in cross-linked CMC/PVA hydrogel. The formation of TiO₂ nanoparticles was confirmed by ultra violet/visible (UV/vis) and transmission electron microscopy, and the particle size distribution of the nanoparticles was determined using the dynamic light scattering. The surface morphology of the finished fabrics was examined by scanning electron microscopy (SEM). The SEM micrographs revealed that TiO₂ nanoparticles were deposited on the surface of cotton fibers. The antibacterial activity of the treated fabrics loaded with TiO₂ nanoparticles was evaluated against Escherichia coli (Gram -ve) bacteria.     

TiO2/SiO2的制备与光催化降解甲基橙

为了探讨Ti02晶粒形貌对光催化过程的作用规律,研究吸附法和浸渍法制备的TiO2光催化剂降解甲基橙的过程,并考察制备反应条件对催化剂形貌和活性的影响.通过剖析反应的基本过程后得出,扩散过程与表面反应过程耦合,催化剂活性与甲基橙浓度的相对高低决定反应过程的控制步骤,从而对表观级数产生影响.在催化剂活性的考评中发现,低Ti含量以及小粒径情况下影响光催化的关键因素是晶型,其次为含量、粒径.吸附法制备的光催化剂Ti含量高,粒径小,可控性好,具有比浸渍法制备的材料更好的催化性能.随着水量的增加,吸附相反应技术的优势越来越显著.     

活性染料染色棉织物的水溶液浸渍光催化剥色

针对纺织品传统剥色工艺中化学品消耗量大、能耗高、环境污染严重等问题,采用光催化技术研发了活性染料染色棉织物的水溶液浸渍光催化(即UV/H2O体系)剥色方法,探讨了水溶液中pH值、温度和剥色时间对剥色率和织物强力的影响,并通过红外光谱仪和扫描电子显微镜对剥色前后棉纤维结构及表面形态进行了分析。研究结果表明:采用UV/H2O体系浸渍剥色法可在活性染料染色棉织物上获得良好的剥色效果;在溶液pH值为6,剥色温度为20℃及剥色处理时间为40 min的条件下,活性染色棉织物(1%(o.m.f)活性染料M-3BE)的剥色率能达到88%,其强力保留率达到93%;与染色样相比,UV/H2O体系中短时间的光催化浸渍剥色对棉纤维的化学结构、表面形态影响相对较小。     

阻燃涤纶织物和毛织物及其混纺试样的性能研究

涤纶燃烧因出现熔滴现象而甚少被用于阻燃防护服,文章采用自制阻燃剂对涤纶和毛织物进行阻燃处理,阻燃效果较好,并探讨了毛/涤混纺织物的阻燃性及断裂强度。结果表明:自制的氮磷复合阻燃剂对涤纶的阻燃级别可达B2阻燃级别,极限氧指数可达28.4%;对毛织物的阻燃效果可达到B1阻燃级别,极限氧指数可达34.7%;阻燃涤纶织物的断裂强力明显高于阻燃毛织物;阻燃毛/涤混纺织物极限氧指数均能达到难燃材料级别,当涤纶含量高于50%时,混纺织物断裂强力高于芳纶等织物。     

纳米二氧化硅涂料印花雪地伪装织物的制备及其性能表征

针对我国适合单兵作战的雪地伪装材料匮乏、服用雪地伪装材料鲜有研究以及现有的雪地伪装材料制作工艺复杂等问题,采用纳米Si O2作为白色印花颜料,通过涂料印花工艺制备了一种兼具雪地伪装与紫外线防护性能的涤纶织物,探讨了颜料与黏合剂对印制织物雪地伪装性能的影响,并对该织物的服用性能进行了测试。结果表明:印制织物在紫外区(300~400 nm)的反射率可达到80%以上,透过率达到5%以下,紫外线防护系数高达300,有较好的雪地伪装效果和紫外线防护性能,且具有良好的白度、手感、透湿性、耐皂洗性和色牢度。     

Isolation,purification and characterisation of lunasin from defatted soybean flour and in vitro evaluation of its anti-inflammatory activity

Lunasin is a chemopreventive peptide present in soybean and other plant sources. The high cost involved in obtaining synthetic lunasin limits its application in chemopreventive and nutritional interventions. The objective of this study was to isolate, purify and characterise lunasin from defatted soybean flour and determine its in vitro anti-inflammatory activity using RAW 264.7 macrophages. Isolation and purification was achieved by ion-exchange chromatography, ultrafiltration and size exclusion chromatography. The identity of lunasin was established by Western blot, HPLC, MALDI-TOF and LC/MS-MS. The results showed that lunasin eluted from a DEAE anion exchange column at 0.15 M NaCl, and after 1.5 void volumes from size exclusion chromatography. Fractions from both chromatographic techniques consistently showed three peptides with positive immunoreactivity against lunasin mouse monoclonal antibody corresponding to 5, 8 and 14 kDa. LC/MS-MS analysis of the three immunoreactive peptides showed that 5 and 14 kDa bands contained the lunasin epitope, RGDDDDDD DDD while 8 kDa band showed high homology with 2 S soy albumin, a lunasin precursor.     

银纳米颗粒/二氧化钛/醋酸纤维素复合纤维的制备及其性能

以纳米TiO_2和Ag NO_3为添加剂,通过静电纺丝装置,成功制备了一种高性能抗菌复合纳米纤维。采用扫描电子显微镜、X射线能谱分析和琼脂平皿扩散法等手段对样品的形貌、纳米粒子的分布、化学态、抗菌性能等进行表征与分析。结果表明:Ag NO_3和TiO_2的质量分数都会对纤维的形貌产生影响,需选择合适的添加范围;在纤维中,醋酸纤维素中的氧原子与Ag之间存在着相互作用;银纳米颗粒的存在,使纤维在可见光区出现明显的吸收峰;银纳米颗粒和TiO_2良好的协同作用使纤维对大肠杆菌和金黄色葡萄球菌具有很好的抗菌效果。