热处理对透明耐磨有机/无机复合涂层性能的影响

以有机硅氧烷为前驱体，采用溶胶-凝胶法结合流平法在PMMA表面制备有机／无机耐磨涂层，研究热处理温度和时间对涂层的硬度、抗划伤性及耐磨性的影响，利用Taber5151耐磨仪等手段分析表征涂层的性能。结果表明：涂膜后PMMA的透光性能仍保持良好；随着热处理温度提高和热处理时间的延长，涂层硬度、抗划伤性及耐磨性提高。     

二次喷涂改性无机涂层

首先提出一种相对简单的方法对无机涂层材料进行改性,即在处理的铝合金表面制备水性无机涂层,然后在无机涂层表面二次喷涂KH-550改性溶胶,对其进行改性,再经烘烤制备了有机改性无机涂层.对二次喷涂KH-550改性溶胶的一些因素对涂层表面性能影响的研究表明KH-550用量≥20%,能明显提高无机涂层的附着力、耐冲击性、耐水性等理化性能.对二次喷涂后涂层的微观形貌和接触角测试结果表明,在KH-550改性溶胶中引入无机纳米或超细粉体,获得了致密、平整的多功能涂层.最后通过对所提出方法的原理探讨及实验结果的分析,确定二次喷涂KH-550溶胶改性无机涂层材料,制备有机改性无机涂层的方法可行.     

表面改性玄武岩鳞片及其无溶剂重防腐复合材料涂层

玄武岩鳞片是一种新型环保材料,在提高防腐涂层性能方面有广阔的应用前景。本课题对玄武岩鳞片的厚度、成分、结晶性、微观形貌等基本性能参数进行了表征,采用硅烷偶联剂KH-550对玄武岩鳞片进行表面改性,将经过硅烷偶联剂处理的玄武岩鳞片加入环氧树脂E51中制备重防腐涂层,研究鳞片的添加量和鳞片粒径对涂层耐磨性、硬度、吸水性以及耐碱腐蚀性的影响。测试结果表明:加入玄武岩鳞片的涂层,表面硬度有较大提高;玄武岩鳞片的粒径和含量对于涂层性能的影响具有耦合效应;玄武岩鳞片的质量分数为6%,尺寸在60目～80目之间时,涂层的耐磨性最好;在涂层吸水性方面,随着鳞片含量的增加,涂层的吸水性降低;在耐碱腐蚀方面,随着鳞片粒径的减小,涂层的耐碱腐蚀性增强,随着鳞片含量的增加,涂层的耐碱腐蚀性先增强后减弱,在玄武岩鳞片的质量分数为9%时耐碱腐蚀性最强。     

铝合金防腐硅溶胶的制备及涂层性能比较

采用溶胶-凝胶方法制备钛杂化硅溶胶和未杂化硅溶胶,并在铝合金表面制备防腐涂层。对涂层耐盐雾性能、交流阻抗值和力学性能进行测试。结果发现,钛杂化硅溶胶涂层比未杂化硅溶胶涂层有更好耐盐雾性能,其交流阻抗值也比未杂化硅溶胶涂层高一个数量级;钛杂化硅溶胶涂层硬度、耐磨性高于未杂化硅溶胶涂层,但其抗冲击强度低于未杂化硅溶胶涂层。     

改性环氧耐磨涂料的性能测定

对聚氨酯改性的环氧耐磨涂料的性能进行测定,采用正交试验法分别测定了制备出的耐磨涂料的附着力、硬度、耐磨性,结果发现聚氨酯改性环氧树脂涂料在不同配比情况下具有不同的硬度、附着力和耐磨性。聚氨酯预聚体的使用,提高了环氧树脂的交联度,明显提高了其耐磨性、附着力和硬度;填料碳化硅和固化剂聚酰胺的使用,能够明显改变环氧树脂的耐磨性、硬度和附着力。     

SiO_2/环氧树脂杂化透明涂层的研制

采用环氧树脂与3-氨丙基三乙氧基硅烷(KH-550)反应制成附着力促进剂,再通过溶胶-凝胶法与甲基三乙氧基硅烷(MTES)、正硅酸乙酯(TEOS)共水解反应制成SiO_2/环氧树脂杂化透明涂层。研究过程中采用傅里叶红外光谱(FT-IR)对附着力促进剂的合成和溶胶-凝胶反应过程进行表征分析,结果表明,当环氧树脂与KH-550比例为2∶1,改性环氧树脂含量与MTES预聚物含量比例为75∶25,涂层附着力达到0级,同时具有最佳的耐磨、耐水煮性能。     

TiO_2负载埃洛石纳米管杂化材料的制备及其在环氧复合涂层中的应用

通过溶胶凝胶法,在天然埃洛石纳米管(HNTs)外壁负载纳米Ti O2晶粒,有效控制了纳米Ti O2粒子的团聚,获得了HNTs负载Ti O2的杂化材料(Ti O2-HNTs)。扫描式电子显微镜(SEM)与X射线衍射(XRD)分析结果表明,纳米Ti O2粒子成功负载于HNTs表面。分别制备了不同Ti O2-HNTs含量的环氧树脂复合涂层,利用热重分析(TGA)、电化学交流阻抗(EIS)、耐磨性测试等表征了复合涂层的性能。结果表明:环氧树脂复合涂层的耐磨性与耐腐蚀性相比于纯环氧树脂均有一定的提高,当Ti O2-HNTs含量为4%时,复合涂层的综合性能最佳。     

环氧树脂耐磨涂层的性能研究

以二硫化钼、氧化铝和SBS为混合填料,分别加入50%、60%、70%、80%以改善环氧树脂的性能,并且通过涂层表面硬度,以及其在无机玻璃板、瓷砖板上的附着力测试,对耐磨涂层的性能进行深入的研究。结果表明:填料的含量为60%时,涂层表面硬度最好,涂层具有较好的耐磨性,此时涂层的附着力也比较好。     

氩弧熔覆技术制备TiC-TiB_2复合陶瓷涂层力学性能的研究

采用以钨极为电极的氩弧熔覆技术,将钛铁粉、B4C粉为主要原料的合金粉末预置在钢基体表面熔覆,进而得到原位合成的TiC-TiB_2复合陶瓷涂层。采用正交试验优化氩弧熔覆工艺参数,通过布氏硬度仪、洛氏硬度仪检测耐磨涂层的硬度,使用磨损试验机测试涂层的耐磨性。结果表明,TIG焊的最佳工艺参数为:电流强度145 A,氩气流量6L/min,焊接速度120 mm/min;熔覆涂层表面及熔合线硬度明显高于基体,加入Cr、Ni等合金粉末,将提高复合材料熔覆涂层表面及熔合线附近区域的硬度;基体内并不含有硬质相以抵抗磨粒磨损,氩弧熔覆技术制备的陶瓷涂层能显著提高材料的耐磨性~([1-4])。     

紫外光固化PUA/纳米SiO_2杂化涂层的制备与性能

采用γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH-570)对硅溶胶改性,将改性的硅溶胶与聚氨酯丙烯酸酯(PUA)低聚物共混,制备出聚碳酸酯(PC)用紫外光(UV)固化耐磨涂层。用红外光谱仪、热重分析仪、激光粒度仪、接触角测量仪对改性前后的纳米二氧化硅(SiO_2)进行了分析表征,并对制备的UV固化涂层的透光率、雾度、表面硬度和附着力进行了测试。结果表明:纳米SiO_2表面接枝上了KH-570,且亲水性降低。当KH-570用量为60%、改性纳米SiO_2用量为4%时,涂覆UV固化涂层的PC的耐磨性得到最佳改善,耐磨试验后,涂覆添加4%改性纳米SiO_2的UV固化涂层的PC较涂覆未添加纳米SiO_2的UV固化涂层的PC,透光率降低值从4.5%降至1.1%,雾度增加值从21.29%降至3.41%,PC表面涂层的铅笔硬度达到2H。     

纳米Al2O3透明耐磨复合涂料的研制

选用纳米Al2O3作为填料，用硬脂酸进行亲油处理，与羟基丙烯酸树脂或聚酯复合，制备了纳米透明耐磨涂料。红外光谱分析表明：硬脂酸与纳米Al2O3表面的羟基进行了反应。用分光光度计、磨耗仪及摆杆硬度计测定了涂料的透明性和耐磨性，添加15％(质量分数)的纳米Al2O3，涂膜的耐磨性能提高了100％，相对于有机玻璃底材耐磨性能提高了2．75倍，可见光平均透过率大于80％。     

Wear resistance of polymer-impregnated mortars and concrete

The wear resistance of mortar and concrete samples untreated and impregnated with solutions of epoxide resin was tested. The compressive strength has a decisive influence on the abrasion of untreated mortar and concrete samples. The idealized diameter area of the maximal grain of the gravel in the sample has less influence on it. The wear resistance of impregnated samples with low compressive strength markedly increases. The hardener used influences the polymerization rate of the activated resin in the structure of samples, with time, and their abrasion is influenced also in this way.     

Development of Scratch- and Abrasion-Resistant Coating Materials Based on Nanoparticles,Cured by Radiation

The aim of this study was to compare the effect of monomers, prepolymers, and nanosilica on the scratch and abrasion resistance of nanocomposite coatings. Ultraviolet (UV) and electron beam (EB) curing were used to cure the nanocomposite coatings. The effect of monomers, prepolymers and nanosilica particles on the viscosity, pendulum hardness, gel content, scratch and abrasion resistance were studied. It was found that the optimum formulation for scratch and abrasion resistance contained 15% Ebecryl 600 epoxy acrylate resin with 30% monomer PETIA and 30% of Aerosil OX-50 nanosilica.     

耐磨紫外光固化水性木器涂料的研究

以水溶性聚氨酯丙烯酸酯为基础配制紫外光固化水性木器涂料,加入纳米氧化铝,考察了体系黏度、二氧化硅、偶联剂对纳米氧化铝分散稳定性的影响,测试了其附着力、硬度、光泽度、耐水性、耐醇性和耐磨性等性能。结果显示,该涂料具有良好的耐水性、耐醇性和耐磨性。     

环氧耐磨防腐涂料的研制及在三峡工程中的应用

介绍了改性树脂、表面助剂在改性环氧耐磨防腐涂料中的应用,并研究了改性树脂和表面助剂对涂层耐水性和耐磨性能的影响。     

Silicone-acrylic hybrid aqueous dispersions of core–shell particle structure and corresponding silicone-acrylic nanopowders designed for modification of powder coatings and plastics. Part III: Effect of modification with selected silicone-acrylic nanopowders on properties of polyurethane powder coatings

Polyurethane powder coating systems consisting of polyester resin, blocked polyisocyanate and two types of “nanopowders” containing core–shell nanoparticles where the core was silicone resin of very low glass transition temperature and the shell was poly(methyl methacrylate) were examined. The blocked polyisocyanate was synthesized using biuretpolyisocyanate obtained from ureapolyisocyanate as starting material capable for blocking and ɛ-caprolactam as blocking agent. The surface properties of cured powder coatings were investigated using scanning electron microscopy (SEM) combined with energy dispersive spectrometry (EDS), X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The surface structure was correlated with the chemical structure of the coatings and macroscopic surface behavior: contact angle, surface free energy, gloss, abrasion resistance, hardness and adhesion to the steel surface.     

Abrasion and nanoscratch in nanostructured epoxy coatings

A series of epoxy nanostructured coatings based on diglycidyl ether of bisphenol A (DGEBA) and an isophorone diamine crosslinker was prepared. Top‐down nanocomposites (3% nanofiller) were obtained by the mechanical dispersion of nanoalumina, silanized nanoalumina, and organomodified clays. Bottom‐up hybrids were instead achieved after the silanization of the DGEBA resin and after cocrosslinking with tetraethylorthosilicate through a self‐catalyzed sol–gel process. The curing process of the nanocomposites was studied by differential scanning calorimetry and suggested an overall increase in the crosslinking kinetics in the presence of nanoparticles. Other characterization included dynamic mechanical analysis, Buchholtz indentation hardness testing, and Taber abrasion testing. Finally, atomic force microscopy (AFM) techniques were used to study the surface morphology of the coatings and to produce nanoscratches. We concluded that, in the top‐down nanocomposites, there were minor changes in the surface hardness and a slight improvement in the abrasion resistance, whereas the nanoscratch resistance assessed by AFM tests showed significantly better performances in the hybrid coatings obtained through sol–gel chemistry. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

耐磨型水性醇酸树脂的研究进展

醇酸树脂具有丰满、光亮、附着力好、可生物降解等诸多优点，广泛应用于车辆船舶、油漆涂料等行业。但醇酸树脂涂层耐久性较差，在使用过程中易受外界摩擦应力使涂层的保护作用失效。因此，如何对醇酸树脂涂层的机械性能进行增强，使其在使用过程中不易遭到破坏依然是目前关注的重点，提高醇酸树脂涂层的耐磨性能至关重要。本文在查阅大量文献的基础上，从水性醇酸树脂的合成方法、影响水性醇酸树脂耐磨性能的因素及水性醇酸树脂的耐磨改性方面进行了综述，目前提升醇酸树脂涂层耐磨性能的主要方法是改进合成工艺以及利用功能材料对醇酸树脂进行改性，从涂层强度、硬度、韧性等方面对醇酸树脂的性能进行提升。本文对耐磨型水性醇酸树脂今后的发展趋势进行了展望，以期为相关工作者提供借鉴与指导，笔者分析，今后关于耐磨型醇酸树脂的进展主要集中在生物原料的发现、新材料的应用、醇酸树脂的适用范围等方向。     

SiAlON nanoparticles effect on the behaviour of epoxy coating

In this work, the influence of SiAlON nanoparticles loading level (0?C12?wt%) was investigated on the mechanical and chemical properties of epoxy resin-based nanocomposites coatings. The samples were characterized by fracture toughness, chemical, pull off, hardness and abrasion tests, followed by scanning electron microscopy of the fracture surfaces and sample surface after performing a chemical test. Nanoparticles were also characterized by transmission electron microscopy and linear light scattering analysis techniques. Epoxy resin coating based on bisphenol A was treated with polyamine hardener as a curing agent. Fracture toughness measurements were carried out using a single edge notched bend specimens within a three-point bending test at room temperature. Effect of SiAlON nanoparticles on the chemical resistance of epoxy resin was investigated by immersion of samples in 3.5?wt% NaCl solution at 85?°C for 60?days. Results indicated the enhancements in the mechanical properties and chemical resistance of epoxy nanocomposite due to the addition of small parts of SiAlON nanoparticles. The contents of samples with 3 and 5?wt% of SiAlON nanopowders have been considered as optimum contents compared to the other samples. They showed improvement in the crack propagation resistance in chemical solution and fracture toughness tests, both. Enhancment in abrasion resistance was found at either of 3 and 5?wt% SiAlON epoxy nanocomposite samples where they showed 59 and 34% abrasion resistance more than that of the neat resin, respectively.     

紫外光固化环氧丙烯酸酯涂料

合成了涂料用紫外光固化环氧丙烯酸酯树脂,并对其固化时间、铅笔硬度、附着力、柔韧性、耐磨性及耐化学品性进行测试,获得了预期的效果。