PET膜用氟碳溶胶涂层性能研究

以PET薄膜为基底,将含氟硅氧烷与γ-氨丙基三乙氧基硅烷形成的溶胶涂敷于其上并加热固化。经测试,此氟碳涂层/PET薄膜在可见光范围内,光透过率达到90%以上,表面疏水性优异,涂层力学性能优良。探讨了溶胶氟含量与涂层接触角的关系,研究表明:当含氟硅氧烷添加量为1%(体积分数),涂层表面氟含量为0.7%(质量分数)时,接触角达到118°,之后再增加含氟硅氧烷添加量,涂层表面接触角基本保持不变。本研究为拓展PET膜应用提供了基础。     

氟硅树脂共混复配对透明疏水涂层性能的影响

[目的]采用低表面能且耐候性较好的氟硅树脂(FSi)作为基底材料,与光泽度较好的双酚A型环氧丙烯酸树脂(EPA)或者环氧树脂(E51)共混,制备出适用于玻璃基底的透过率高、力学性能好的疏水涂层,探讨不同树脂配比对涂层性能的影响。[方法]通过扫描电镜、接触角测量仪、紫外可见分光光度计、附着力拉拔测试仪和铅笔硬度计,对涂层进行性能测试及微观形貌表征。[结果]随着FSi含量的增大,涂层性能会受到一定影响。FSi与E51复配的效果优于FSi与EPA复配。当FSi与E51的质量比为1∶1时,涂层的附着力可达6.16 MPa,铅笔硬度3H,水接触角124.98°,透过率在可见光波长范围内可达70%以上,吸水率则只有3%～6%,磨损后的质量损失最小且水接触角仍维持在105°左右。[结论]以氟硅树脂为基底复配环氧树脂作为成膜物,可以提高透明疏水涂层的性能,具有较好的应用前景。     

PET膜用氟碳溶胶涂层性能研究简

以PET薄膜为基底,钭含氟硅氧烷与y-氨丙基三乙氧基硅烷形成的溶胶涂敷于其上并加热固化。经测试,此氟碳涂层／PET薄膜在可见光范围内,光透过率达到90％以上,表面疏水性优异,涂层力学性能优良。探讨了溶胶氟含量与涂层接触角的关系,研究表明：当含氟硅氧烷添加量为1％（体积分数）,涂层表面氟含量为0．7％（质量分数）时,接触角达到118°,之后再增加含氟硅氧烷添加量,涂层表面接触角基本保持不变。本研究为拓展PET膜应用提供了基础。     

多臂UV固化含氟聚碳酸酯聚氨酯的制备及应用

聚碳酸酯二元醇(PCDL)与异佛尔酮二异氰酸酯(IPDI)反应后,再分别与丙烯酸羟乙酯(HEA)及十三氟辛醇反应,得到双键半封端物及含氟半封端物,随后以二聚甘油为核将两者按物质的量比1∶1反应得到多臂UV固化含氟PCDL基聚氨酯丙烯酸酯(FPUA)。采用傅里叶变换红外光谱(FT-IR)、核磁共振(1H-NMR)表征了FPUA的结构。并以其为添加剂,加入到市售聚氨酯中,制备了低表面能的疏水涂层,通过表面水油接触角、硬度及附着力测试,对疏水涂层的表面性能及物化性能进行了表征。     

光聚合法快速制备低表面能涂层

以硅烷偶联剂为基础利用光聚合技术,快速将含氟单体以共价键的方式固定在玻璃表面,同时通过模板进行局部曝光,对涂层表面进行了图案化修饰;采用衰减全反射红外光谱、偏光显微镜、X射线光电子能谱分析以及水接触角对涂层性能进行了测试。实验结果表明:在玻璃表面得到了低表面能涂层,经图案化修饰后,涂层的疏水性可以进一步得到提升。     

十二氟庚基丙基甲基二甲氧基硅烷含量对含氟有机硅/二氧化硅杂化涂层性能的影响

采用溶胶–凝胶法,以正硅酸乙酯(TEOS)为SiO2前驱物,二甲基二乙氧基硅烷(DMDES)和十二氟庚基丙基甲基二甲氧基硅烷(12FHPMDMS)为有机硅前驱物,制备得到含氟有机硅/SiO2溶胶,经热固化后得到了不同12FHPMDMS含量的含氟有机硅/SiO2杂化涂层。通过红外光谱表征了溶胶及固化后涂层的结构,采用热重分析仪(TGA)、接触角仪对涂层性能进行分析并测试了其附着力、硬度、冲击强度和耐盐雾腐蚀性(NSS)。结果表明:含氟有机硅/SiO2杂化涂层具有良好的机械性能;随着12FHPMDMS加入量增加,含氟有机硅/SiO2杂化涂层的耐热性提高,接触角先增大后减小。当n(TEOS)∶n(DMDES)∶n(12FHPMDMS)=10∶8∶4时,疏水性最好,接触角达到110.0°且涂层综合性能最佳。     

含氟三羟甲基三聚氰胺树脂的制备与性能

以十三氟辛醇、异佛尔酮二异氰酸酯、六羟甲基三聚氰胺为原料合成了含氟三羟甲基三聚氰胺树脂。通过核磁共振和红外光谱表征了产物结构以及反应程度。将含氟三羟甲基三聚氰胺树脂与三聚氰胺甲醛树脂以不同比例进行固化成膜,测定了不同氟含量的涂膜的接触角、固化交联率、吸水率、硬度、附着力和耐水性。结果表明:氟含量为12%时,反应转化率可达91%;涂层的综合性能较好,水接触角达106°。     

含氟聚苯乙烯微球的制备及其疏水性能研究

以苯乙烯(St)和含氟单体(G04)为原料、聚乙烯吡咯烷酮(PVP)为分散剂和乙醇/水为混合溶剂,采用分散聚合法制备出PS-F(含氟聚苯乙烯)微球;然后以苯丙乳液提供的附着力、PS-F微球提供的疏水性能,制备PS-F疏水涂层。结果表明:制备PS-F微球的最佳工艺条件是m(总单体)=m(St+含氟单体)=20 g且m(St):m(含氟单体)=18:2、w(AIBN)=1.5%、w(PVP)=7.5%、V(乙醇)=108 mL、V(H_2O)=72mL、反应温度70℃和反应时间10 h,此时PS-F微球的粒径为0.4～1.0μm;当w(PS-F微球)=60%时,疏水涂层的水接触角为130。左右;含氟单体含量和苯丙乳液含量对水接触角的影响不大,涂层疏水性能主要与PS-F微球大小、涂层表面粗糙度有关。     

新型氟硅改性环氧丙烯酸超疏水防污涂层研究

采用自由基聚合法,合成了氟硅改性苯乙烯环氧丙烯酸树脂,其中硅以硅溶胶的形式,将无机网络引入到聚合物网络体系中,形成有机-无机杂化材料。通过对涂膜的附着力、耐冲击性、接触角等各项性能的研究,得到合成树脂的最佳配比为:软硬单体比为0.8,含氟单体含量为12%,环氧含量为10%,苯乙烯含量为10%,丙烯酸含量为6%。并且考察了无机硅溶胶对涂膜化学稳定性能的影响、涂层表面氟原子含量以及涂膜与水接触角。通过添加纳米SiO2,制备了具有微纳米阶层型结构的涂层,其与水的接触角可达150°,具有超疏水特性。     

全氟聚醚改性UV固化丙烯酸酯涂料的合成与性能研究

以全氟聚醚醇、异佛尔酮二异氰酸酯(IPDI)、甲基丙烯酸羟乙酯(HEMA)为原料合成了含氟聚氨酯丙烯酸酯(FUA),以全氟聚醚醇和丙烯酰氯为原料合成了含氟丙烯酸酯(FM),通过红外手段表征了产物结构。将FUA与FM分别加入聚氨酯丙烯酸酯(PUA)体系和环氧丙烯酸酯(EA)体系,再配以活性稀释剂与光固化剂,制备了一系列UV固化涂料。研究了UV固化膜的凝胶含量、耐化学品性、硬度、水接触角、附着力。研究表明:通过全氟聚醚醇改性的丙烯酸酯类涂膜(FUA-PUA、FUA-EA和FM-PUA体系)具有良好的表面性能、耐化学品性,且加入了FUA的PUA涂层表面水接触角可以由98°提高到113°,体现了很好的疏水性能。     

Preparation of photo curable highly hydrophobic coatings using a modified castor oil derivative as a sol-gel component

Modification and use of natural products have gained a lot of interest in recent years due to their environmental friendliness and their availability from different sources. In this study castor oil based photo curable highly hydrophobic coatings were prepared and characterized. Castor oil (CO) was first modified with 3-isocyanato propyl triethoxy silane and then it was hydrolyzed prior to the coating preparation. The resulting precursor was mixed with norbornyl acrylate, hexane diol diacrylate and hydrophobic coatings were prepared with the aid of fluorinated and nonfluorinated alkoxy silane coupling agents. The addition of fluorine showed a significant impact on the properties of the coatings. As the fluorine content was increased in the formulations, flame retardancy and the contact angle values of the coatings increased. The highest amount of fluorine containing coating showed a contact angle of 119°. Then with the addition of nonfluorinated alkoxysilane compounds, a contact angle of 130° was reached. Also the effect of post-cure temperature on contact angle values was investigated.     

Photo‐curable highly water‐repellent nanocomposite coatings

Modification and use of natural products have gained a lot of interest in recent years due to their environmental friendliness and their availability from different sources. In this study, (castor oil)‐based photo‐curable highly hydrophobic coatings were prepared and characterized. Castor oil was first modified with 3‐isocyanatopropyltriethoxysilane and then hydrolyzed prior to the coating preparation. The resulting precursor was mixed with norbornyl acrylate and hexanediol diacrylate, and highly roughened hydrophobic coatings were prepared with the aid of fluorinated/nonfluorinated alkoxysilane coupling agents and hydrophobic fumed nanosilica particles. The coatings were applied on borofloat glass. The addition of fluorine and nanosilica showed a significant impact on the properties of the coatings. As the fluorine and nanosilica contents were increased in the formulations, flame retardancy and the contact angle values of the coatings increased. The surface roughness of the coatings increased with the addition of hydrophobic fumed nanosilica particles. Also, the relation between the surface energy and the contact angle values of the coatings was investigated. J. VINYL ADDIT. TECHNOL., 19:31–38, 2013. © 2013 Society of Plastics Engineers     

几种低表面能含硅(氟)涂料的性能

本文制备了几种新型的含硅或氟低表面能防污涂料包括溶剂型有机硅渗透反应型涂料、有机硅改性丙烯酸酯共聚物涂料和含氟共聚物低表面能涂料,从低表面能防污涂料的原理出发探讨了建材经含有机硅、氟溶剂型有机涂料的防水抗沾污能力的影响要素,研究了有机硅氟本身结构、含量、催化交联剂等对各种涂料的水接触角、吸水率、耐污染性等表面性能特别是后两者成膜共聚物的影响。结果表明,同时含有硅氟元素的共聚物由于有机硅基团中含可交联反应的基团和有机氟基团的更低的表面能而具有较高力学强度如铅笔硬度、粘接力、耐磨性和耐洗刷性及良好的防水抗污能力。     

高性能含氟丙烯酸酯共聚物涂料

研究了含氟丙烯酸酯共聚物涂料表面性能的影响因素,结果表明：含氟丙烯酸酯类单体及共聚单体的种类、侧链含氟烷基、聚合工艺、自由基引发剂用量和有机硅偶联剂及交联催化剂等因素对共聚物膜的疏水性(水接触角和吸水率)、表面硬度及其光泽、透明性都有显著影响。     

Fabrication of transparent super-hydrophilic coatings with self-cleaning and anti-fogging properties by using dendritic nano-silica

In this paper, super-hydrophilic coatings were generated on glass substrates via dipping method using colloidal silica with different morphologies as the main raw materials. The coatings were characterized by transmission electron microscope (TEM), field emission scanning electron microscope (FE-SEM), water contact angle (WCA) analyzer, and atomic force microscope (AFM). The hardness, adhesion, self-cleaning and antifogging properties of the coatings were examined. It has been found that the hydrophilicity of the coating can be significantly improved by using dendritic silica nanoparticles, and the comprehensive performance of the coating is optimum when the branch length of dendritic silica nanoparticles is about 60 nm. The coatings show super-hydrophilicity (CA, 1.7°), and high transmittance (the maximum light transmittance of the coating on glass is increased by 2.2%). Moreover, the coating is very effective in eliminating fog and dirt. The hardness and the adhesion of the coating can be reached 9H and grade 0, respectively, indicating that the coatings have a good mechanical performance, which is essential for its application.     

Transparent polysilicone coatings as protecting films for gold commemorative coins

Novel transparent organic silicone resin coatings were successfully prepared through the reaction between the alkoxy groups of methyltrimethoxy‐silane (MTMS) and γ‐aminopropyltriethoxysilane (APTES) and hydroxyl groups of hydroxyl terminated silicone oil (HTSO). The influences of different monomer feed mass ratio on the coating properties were investigated via measuring the hydrophobicity and hardness of coating films. The coating films were characterized with IR, UV, TG, scanning electron microscope (SEM), and automatic contact angle meter. Some properties of coating films, such as adhesion, impact resistance, and wear‐resistance, were also evaluated. The results indicated that these coating films formed on the surfaces of gold commemorative coins possessed some good properties including high hydrophobicity, high water contact angles, high light transmittance, good heat‐resistance, adhesion, hardness, and weatherability, etc. Moreover, the uniform, clear, transparent, and dense coating films did not cover the symphony surface patterns or affect the metallic luster. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

改性SiO2/聚硅氧烷无氟超疏水涂层的制备及性能

为了提高基体材料的防污能力,在基体表面制备了一种无氟超疏水复合涂层。首先,使用十六烷基三甲氧基硅烷(HDTMS)对二氧化硅(SiO_2)微纳米颗粒进行疏水改性,其次,将改性后的SiO_2颗粒与有机硅烷混合,利用硅烷的水解、聚合在基体材料的表面得到一层稳定的无氟超疏水复合涂层。采用FTIR、TGA、SEM、AFM和接触角测量仪对涂层的化学组成、表面微观结构和疏水性能进行表征。结果表明:复合涂层表面具有微纳米尺度的粗糙结构,并具有优异的自清洁性和耐磨损性;未磨损前接触角达151°,磨损100周次后接触角进一步提高至161°。     

有机桥连聚倍半硅氧烷光学防潮涂层的制备

以巯丙基三甲氧基硅烷(MPTMS)和3-(甲基丙烯酰氧)丙基三甲氧基硅烷为(MATMS)为原料,经巯-烯点击反应制备有机桥连硅烷前驱体3-三甲氧硅基丙基-2-甲基-3-[(3-三甲氧硅基)丙基硫代]丙酸酯(MPMA).采用溶胶-凝胶法,MPMA在酸性条件下水解-缩聚得到溶胶,将其分别沉积在载玻片和聚醚酰亚胺(PEI)上...     

疏水性SiO2增透膜的制备与表征

以三甲基氯硅烷（TMCS）为有机掺杂剂,采用溶胶-凝胶法制备正硅酸乙酯为前驱体,氨水催化的复合SiO2增透膜。用紫外-可见分光光度仪、接触角测量仪对膜层进行了表征。结果表明：未经TMCS掺杂的SiO2增透膜的峰值透过率为97．5％,而一定浓度TMCS掺杂后的SiO2复合膜的峰值透过率为983％,说明掺杂并没有影响薄膜的增透效果。掺杂前后增透膜对水的接触角从15°增加到123°,显著的提高了薄膜的疏水性能。     

Comparative Study of Corrosion Protection of Sol–Gel Coatings with Different Organic Functionality on Al-2024 substrate

In this paper we have studied the effect of addition of amino silane and sulfur silane by 2 wt% into a reference coating solution by using two basic silane coupling agents methyl-tri-ethoxy silane (MTEO) and glycidoxy-propyl-tri-ethoxy silane (GPTS) in 1:1 molar ratio by sol–gel technique. The change in hydrophobicity due to the addition of amino group and thiol group was investigated by contact angle study and sol–gel kinetics was studied by Fourier transform infrared spectroscopy. The thermal resistance and surface morphology was analyzed by thermo gravimetric method and scanning electron microscope. The anti corrosion property of all three coatings were evaluated by potentiodynamic polarization study, AC impedance and salt spray method. X-ray photoelectron spectroscopic method was used to monitor the bonding mechanism of coating matrix with the metal surface. All type of investigations revealed that, addition of thiol group containing silane coating to the reference coating solution has caused remarkable improvement in hydrophobicity and corrosion resistance properties where as amine group rendred the surface less hydrophobic and showed no sign of improvement in corrosion protection. The most probable reason behind this improved performance is due to the additional hydrophobicity imparted by much less polar thiol group. But amino silane provided comparatively poor performance due to the presence of polar amine group.