纳米TiO2改性复合涂层材料的制备及光催化性能研究

采用水热法制备的纳米TiO_2作为增强材料对环氧树脂进行改性,分散纳米TiO_2到正在生成的环氧树脂中,制备纳米TiO_2/环氧树脂涂层,研究了纳米TiO_2含量对涂层硬度、附着力、冲击性能、耐腐蚀性和光催化性能的影响。结果表明,随着纳米TiO_2的适量加入,环氧树脂涂层的各项性能均不同程度改善,当纳米TiO_2的加入量为0.05%时,涂层硬度、附着力、耐冲击性能、耐腐蚀性和光催化性能均达到最佳值。     

(Ni-P)-纳米Al2O3-PTFE化学复合镀层的性能研究

在化学镀Ni-P合金镀液中添加纳米Al2O3及PTFE获得(Ni-P)-Al2O3-PTFE复合镀层.研究了纳米Al2O3及PTFE对镀层硬度、磨损及减摩性能的影响.结果表明:纳米Al2O3及PTFE的加入能提高Ni-P合金镀层的硬度、耐磨及减摩性.     

硅铝复合树脂的制备及其涂层性能

以硅溶胶和甲基三乙氧基硅烷(MTES)为前驱体,乙酸为催化剂,添加Al2O3纳米粒子,经水解-缩聚合成硅铝复合树脂,再加热固化成膜得到硅铝复合涂层,研究了所得涂层的结构与性能。硅铝复合涂层为Si—O交替形成的四元环体型结构。m(Al2O3)/m(MTES)为0.010时制备的硅铝复合涂层的力学性能最佳,铅笔硬度为8 H,附着力为0级,透光率达92.5%,硅铝复合涂层中Si—CH3的起始分解温度为500℃,耐热性能明显提高。     

填料对环氧树脂-粉煤灰涂层性能的影响

制备了粉煤灰-EP复合板材的涂层材料,探讨了粉煤灰含量由20份增加到60份,分别在不添加其他填料、添加60份Al(OH)_3以及添加60份Al(OH)_3和10份PTFE三种情况下,涂层性能的变化趋势。结果表明:粉煤灰含量由20份增加到60份,涂层的热导率和表面硬度变化不大,附着力增加了31.8%;添加60份Al(OH)_3,涂层的热导率变化不大,表面硬度同比提高了22.2%~24.6%,附着力同比提高了38.5%~55.8%;继续添加10份PTFE,涂层的热导率随粉煤灰含量增加而大幅增加,表面硬度同比又提高了6.6%~10.4%,附着力同比又提高了27.2%~35.0%。另外,涂层仅含粉煤灰填料时,其耐酸性略差,加入60份Al(OH)3时耐酸性略有改善,继续加入10份PTFE后耐酸性进一步改善,而各种填料对涂层耐碱性影响不大。     

纳米SiO2增强双酚A型酚醛环氧树脂涂层的制备和性能

为了获得热稳定性好、韧性高且附着力优异的酚醛环氧树脂，采用水热合成法合成了不同酚醛比的双酚A型酚醛树脂，利用环氧氯丙烷进行改性，并加入纳米二氧化硅制备得到纳米粒子增强型酚醛环氧树脂防腐涂层，并对涂层的热稳定性和力学性能进行分析。结果表明：新型酚醛环氧树脂与传统环氧树脂相比，具有更好的耐热性和力学性能，经过纳米改性后的涂层具有更好的腐蚀防护性能，当酚醛比为1∶1，纳米二氧化硅添加量为3%时，涂层的硬度达到5H，附着力达到1级，柔韧性达到1 mm，且在30 d浸泡实验后阻抗依旧在10⁸Ω·cm²以上。表明在酚醛环氧树脂中添加纳米二氧化硅可以改善涂层的机械性能和防腐性能，且最佳添加量为3%。     

石墨烯光固化涂料的制备及防腐性能研究

为了提高光固化涂料的耐腐蚀性，将不同质量分数的石墨烯添加到光固化涂料中，制备了石墨烯复合光固化防腐涂层。对不同含量石墨烯复合光固化防腐涂层的硬度、耐冲击性、附着力等物理性能进行测试，并通过极化曲线、电化学阻抗谱等对其电化学性能进行了研究。最后，采用盐雾试验对不同石墨烯添加量的光固化涂层的防腐性能进行了评价。结果表明：当石墨烯的添加量为 0.1%时，涂层的硬度、耐冲击性以及附着力等物理性能得到显著增强，此时涂层的腐蚀电位最高，腐蚀电流密度最低，具有优异的耐腐蚀性能。     

纳米Al_2O_3/有机-无机杂化复合铝合金涂层的耐腐蚀性能研究

在溶胶-凝胶法合成有机-无机杂化丙烯酸树脂的基础上,采用盐雾试验和电化学交流阻抗技术研究了纳米A l2O3添加量对有机-无机杂化丙烯酸复合涂层材料的耐腐蚀性能的影响。研究表明:纳米Al2O3添加量为12%时,涂层的耐腐蚀性能有了较大的提高,耐盐雾时间由100 h提高到450 h,涂层的阻抗值也由104Ω.cm2提高至106Ω.cm2以上。另外,通过扫描电镜观察了复合涂层的断面,发现涂层中纳米粒子分散均匀,并且粘接紧密,形成了较为致密的复合涂层。     

溶胶电泳沉积法在304不锈钢表面制备γ-Al2O3涂层

采用溶胶电泳沉积法在304不锈钢表面上制备了γ-Al2O3涂层.通过扫描电镜(SEM)、X射线衍射(XRD)等手段对制备的γ-Al2O3涂层进行了表征,并采用超声波振荡考察了涂层的结合牢固度,讨论了电泳沉积液中γ-AlOOH溶胶的体积分数,纳米Al2O3的质量浓度、沉积电压、沉积时间及搅拌速率对γ-Al2O3 涂层性能的影响.结果表明:将溶胶加入到无水乙醇溶液中可制得稳定的电泳沉积液,添加纳米Al2O3可提高涂层沉积量和稳定性.当电泳沉积液中γ-AlOOH溶胶的体积分数为30%～40%,纳米Al2O3加入量为20～30 g/L,搅拌速率为375 r/min时,电压lOV下沉积5～10min,然后在600 ℃下焙烧3 h,所得到的γ-Al2O3涂层结合牢固.     

溶胶电泳沉积法在304不锈钢表面制备γ-Al2O3涂层

采用溶胶电泳沉积法在304不锈钢表面上制备了γ-Al2O3涂层.通过扫描电镜(SEM),X射线衍射(XRD)等手段对制备的γ-Al2O3涂层进行了表征,并采用超声波振荡考察了涂层的结合牢固度,讨论了电泳沉积液中γ-AlOOH溶胶的体积分数、纳米Al2O3的质量浓度、沉积电压、沉积时间及搅拌速率对γ-Al2O3涂层性能的影响.结果表明:将溶胶加入到无水乙醇溶液中可制得稳定的电泳沉积液,添加纳米Al2O3可提高涂层沉积量和稳定性.当电泳沉积液中γ-AlOOH溶胶的体积分数为30%～40%,纳米Al2O3加入量为20～30 g/L,搅拌速率为375 r/min时,电压10 V下沉积5～10 min,然后在600℃下焙烧3 h,所得到的γ-Al2O3涂层结合牢固.     

聚硫橡胶改性环氧/环硫树脂复合防腐蚀涂料的制备

以环氧/环硫树脂为基料,聚硫橡胶为增韧剂,聚苯胺(PANI)为防腐蚀成分,改性纳米Ca CO3和纳米Si O2作为无机填料,制备了聚硫橡胶改性环氧/环硫树脂复合防腐蚀涂料。研究了不同聚硫橡胶和无机填料用量对涂层机械性能和防腐蚀性能的影响,并通过热失质量(TGA)对产物热稳定性能进行分析。结果表明:添加环硫树脂(50%,相对于成膜物质的质量百分比,下同)提高了漆膜附着力,聚硫橡胶(10%)提高了漆膜柔韧性,而加入PANI(5%)后提高了漆膜防腐蚀性能,改性纳米Ca CO3(3%)或纳米Si O2(3%)对漆膜的力学性能和热稳定性均有所提升。     

The effects of adding nano-alumina filler on the properties of polymer-derived SiC coating

In this paper, SiC coating was prepared using the polymer-derived ceramic method; then the effect of nano-alumina as a filler material was studied. First of all, polycarbosilane(PCS) was dissolved in xylene; after that, different amounts of nano-alumina particles were added to the solution. The coating was deposited on the alumina substrate using the dip-coating method; this was followed by sintering at 1200℃. The phase content and microstructure of the samples were studied by X-ray diffraction and scanning electron microscope methods, respectively. Nanohardness, Young's modulus, and coating adhesion were investigated by a nanoindentation method. The sheet resistance was evaluated using the four-point probe technique; also, the wear resistance of the coating was studied by applying the pin-on-disk method. It was found that the addition of the nano-alumina filler up to 20 wt% drastically improved the adhesion and wear resistance of the SiC coating.     

耐温耐磨双组分瓷膜涂料的研制

瓷膜涂料具有高硬度、耐磨、耐腐蚀等优异特性,以甲乙两组分按一定比例混合熟化8。24h后,喷涂至工件上,于180℃烘烤20-40min,制得瓷膜涂层。研究了甲、乙组分配比,以及纳米氧化铝和碳化硅用量对涂膜综合性能的影响。通过在烫发器上的应用,进一步表明瓷膜涂料具有优异的耐温和耐磨特性。     

颜填料体积浓度的用量对涂料保色性的研究

阐述了配色原理,分析了不同PVC用量对涂膜的附着力、硬度、耐水、耐酸等性能的影响,得到PVC的用量在48%时,涂料的各种性能达到最佳,同时还给出了用来配深、中、浅各种颜色的白色涂料PVC的范围及相应的色浆用量,采用控制颜填料体积浓度的用量,解决了涂料保色性的问题;通过扫描电镜分析、粒度分析对比,观察了涂料的外貌和平均粒径,结果表明,在PVC为48%时,涂料的分散效果及稳定性均好。     

Al2O3的表面处理及粒子尺寸对SBR导热橡胶性能的影响

以丁苯橡胶为基质，微米氧化铝与纳米氧化铝为导热填料，制备了填充型导热橡胶，研究了微米氧化铝填充量，偶联剂表面处理对导热橡胶导热性能的影响。比较了纳米氧化铝和微米氧化铝填充的导热橡胶的导热性能及物理机械性能。并将2种粒子以不同配比加入了苯橡胶基质中，对其影响进行了探讨。结果表明，随着微米氧化铝填充份数的增加，丁苯橡胶的导热系数增大，但共加工性能和物理机械性能下降；用硅烷偶联剂KH-570，KH-550，A-151和钛酸酯偶联剂TM-S105表面处理后的微米氧化铝对导热橡胶的导热性能有一定影响，但并不显著，在相同填充量下，纳米氧化铝填充的导热橡胶比微米氧化铝填充的导热橡胶具有更好的导热性能及物理机械性能；在合适的比例下，纳米氧化铝与微米氧化铝混合填充的导热橡胶其导热效果优于单纯使用微米粒子填充的橡胶。     

水性环氧磷酸酯乳液的制备及其性能研究

以85%的磷酸和双酚A型环氧树脂(E51)为原料,采用自乳化法制备水性环氧磷酸酯乳液。采用傅里叶红外光谱(FT-IR)对反应前后物质的结构进行了表征。研究了产物在不同条件下的黏度、硬度、涂膜附着力、耐水煮性等性能的变化,探讨了游离磷酸、单磷酸酯和双磷酸酯等对产物性能的影响。结果表明:反应产物中引入大量的亲水基团,使产物具有良好的水可分散性;当磷酸羟基与环氧基的物质的量比为3∶2、产物黏度为2 326 mPa·s时,制备的水性环氧磷酸酯乳液的综合性能最好;当单磷酸酯含量较高时,有利于提高产物涂层与金属基底的附着力和耐水煮性。     

氟硅改性无溶剂环氧涂料的制备与性能

采用甲基丙烯酸十三氟辛酯（TFM）改性氨基硅油（AS）制备氟化氨基硅油（FAS）,并用其改性环氧树脂（EP）探究氨基硅油及氟化氨基硅油添加量对环氧涂层性能的影响。本文通过红外光谱对改性结果进行表征,通过柔韧性测试、画圈附着力测试、铅笔硬度测试、耐冲击测试、热失重测试、接触角测试、紫外加速老化实验和Tafel极化曲线测试,分别评价涂层的柔韧性、附着力、硬度、耐冲击性、耐热性、疏水性、耐候性和防腐性能,通过扫描电镜对涂层断面进行分析,并通过EDS对涂层进行表面元素分析。结果表明,氟添加量为15%制备氟化氨基硅油改性环氧树脂时,氟硅改性EP涂层相对于未改性EP涂层,硬度由2H提升至3H,附着力由2级提升至1级,柔韧性由1mm提升至0.5mm,耐冲击由45cm提升至50cm,热稳定性增强,接触角由70.5°提升至123°,耐紫外老化（432h）由3级提升至1级,E_corr由-0.6187V正移至-0.1720V,I_corr由1.9858×10^-8A/cm²减小至3.7125×10^-10A/cm²。适量氟化氨基硅油的引入,显著提升了环氧涂层的机械性能、耐候性能和防腐性能。     

共混法制备低摩擦聚氨酯复合涂层

选用自制聚氨酯、不同规格的聚乙烯蜡及有机硅为原料,采用共混的方法制备了聚氨酯复合涂层,通过测定摩擦系数、铅笔硬度、接触角及划痕试验、扫描电镜等表征手段研究了聚乙烯蜡含量及粒径和有机硅含量对涂层性能的影响。结果表明:聚乙烯蜡含量为1%~3%时,涂层的润滑性较好,且粒径越小对降低涂层摩擦系数越有利。有机硅含量为0.6%时,涂层的润滑效果最好。有机硅和聚乙烯蜡可对涂层润滑效果起到协同作用,且对涂层热性能、硬度、附着力等几乎没有影响。     

Synthesis of acrylate-based UV/thermal dual-cure coatings for antifogging

A dual-cure hydrophilic acrylate polymer was synthesized via radical polymerization with acrylic acid (AA), isophorone diisocyanate (IPDI), 2-acrylamide-2-methylpropane sulfonic acid (AMPS), hydroxyethyl acrylate (HEA), and 3-(trimethoxysilyl)propyl-2-methyl-2-methacrylate (MPS) as monomers, then used as prepolymer for antifog coating with tetraethylorthosilicate (TEOS) as a novel crosslinker. The prepolymer was mixed with crosslinking agent and photoinitiator to form coating formulas. The coating was characterized by nuclear magnetic resonance (NMR), Fourier-transform infrared (FTIR) spectroscopy, and contact angle measurements. The results indicated that the dosage of AMPS and TEOS had great influence on the antifog performance. With an increasing TEOS amount, the hardness, adhesion, water resistance, impact resistance, and thermal stability of the films were improved, at the expense of transparency; with increasing dosage of AMPS, the hydrophilicity of the film increased at the expense of water resistance. Optimum coating properties could be obtained when the amount of AMPS was 7% and that of TEOS was 5.5%. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) results showed that some SiO₂ microspheres were formed and microphase separation occurred between the macromolecular segments, yielding the excellent coating properties.     

Construction of porous cellulose tubes and the evaluations of mechanical properties and cytocompatibility

In this work, regenerated cellulose (RC) tubes with the porous structure were successfully fabricated for constructing the non-invasive detection platform of vascular microenvironment. Polyethylene oxide (PEO) as a porogen was applied to induce porous structure of cellulose tubes. Tensile and burst pressure tests were carried out to evaluate the effects of PEO molecular weight and amount on the mechanical properties of cellulose tubes. The results showed that tensile strength of RC tubes was increased with increasing PEO molecular weight. The compliance of cellulose tubes decreased with increasing the PEO content. When 120 kDa PEO was applied, the average tensile strength of RC tubes could reach 1.27 MPa. The maximum burst pressure and compliance of RC tubes could reach 488.25 ± 35 mmHg and 7.50 ± 3.7%/100 mmHg, respectively. Human umbilical vein endothelia cells (HUVECs) exhibited obvious proliferation on cellulose tubes, and the collagen coating further improve the biocompatibility. The incorporated collagen further improved adhesion of the cells and growth on cellulose tubes. This work provided a kind of cellulose-based tube material with potential application for the construction of the vitro vascular microenvironment.     

载重斜交轮胎胎圈钢丝包胶配方的改进

对载重斜交轮胎胎圈钢丝包胶配方进行改进,通过调整生胶体系,降低胎圈钢丝包胶中填料的用量,适当提高炭黑用量,采用间-甲-白和钴盐并用的粘合体系等途径,提高了胎圈钢丝包胶的强度,改善了与钢丝的粘合性能,减小了载重斜交轮胎胎圈爆破和胎圈钢丝刺出等缺陷,成品轮胎的胎圈问题退赔率由原来的1.3%降为0.1%以下,显著提高了轮胎的实际使用寿命。