镀锌基材用改性环氧涂料的研究

采用环氧树脂与氯醚树脂物理复配的方法,选用合适的环氧固化剂,制得一种可用于镀锌基材的改性环氧涂料。研究了不同型号的环氧树脂与氯醚树脂物理复配比例对改性环氧涂料性能的影响,以及改性环氧涂料涂膜在镀锌基材上的柔韧性、层间配套性、附着力等性能。制得的改性环氧涂料涂膜在镀锌基材表面的柔韧性、层间配套性、附着力等性能较常规环氧涂料有明显提高,能够满足镀锌基材的防护要求。     

工业用改性环氧低表面处理底漆的研制

合成一种分子结构较大的异氰酸酯组分,作为环氧防腐底漆的固化剂,用于改性环氧底漆,使涂膜具有聚氨酯的柔韧性和环氧树脂的附着力,配以磷酸盐活性防锈颜料,使该防锈涂料具有良好的防锈性能、高度的弹性和柔韧性、优异的附着力,用于低表面处理的钢铁表面,可直接刷涂在旧的涂膜上,对底材处理不彻底的钢铁表面也表现出优异的防腐性能。     

水性环氧树脂涂料及其固化机理的研究

通过对环氧树脂室温固化剂三乙烯四胺进行封端、加成、成盐等一系列改性,制得自乳化水性环氧树脂固化剂;与低相对分子质量的液体环氧树脂混合后,获得了水性环氧树脂涂料。研究了不同封端剂对固化剂乳化性能的影响以及与环氧树脂配成涂料后对涂膜性能的影响,并通过对固化成膜过程的观察,阐述了水性环氧体系固化机理。获得的涂料乳液粒径小于2μm;涂膜硬度>0.7;附着力1级;涂膜具有良好的透明性、耐水性及耐化学药品性。     

环境友好型低表面处理环氧涂料的制备

采用润湿性好的环氧树脂,辅以助剂、溶剂、颜填料、固化剂搭配制备出环境友好型低表面处理环氧涂料,以低表面处理环氧涂料在锈层中的渗透性及锈转化测试方法作为评价在锈蚀面性能的依据,再结合锈蚀、潮气、油污染基材表面涂膜的附着力、涂装效果和涂装厚度等数据,结果表明制备的涂料在潮湿、油污、锈蚀基材上有较好的附着力和防腐性能,并且有优异的贮存稳定性和施工性。     

聚苯胺改性涂料的防腐性能研究

将聚苯胺与聚酯树脂、环氧树脂溶液共混制备防腐蚀涂料.用腐蚀电位时效法考察了饱和聚酯、环氧-低相对分子质量聚酰胺固化体系和环氧-二乙烯三胺固化体系中聚苯胺的加入量对防腐性能的影响.结果表明:对聚苯胺进行适当的还原处理,有利于改善其溶解性和在涂料中的分散性,提高涂层的防腐性能.涂料的最佳配方为:聚苯胺溶液中苯肼用量为1%,环氧树脂、聚酰胺固化剂和聚苯胺的质量比为1:1:0.06.涂覆该涂料的电极腐蚀电位可达-305 mV.     

高附着力单组分环氧改性丙烯酸涂料的制备

以常用丙烯酸单体为主要原料,加入顺丁烯二酸酐,合成出侧链带有酸酐基团的丙烯酸树脂,再与环氧树脂反应,制得环氧改性丙烯酸树脂。由其制备的单组分环氧改性丙烯酸涂料对玻璃等难附着基材具有优异的附着力。考察了环氧树脂的不同用量对树脂体系相容性及漆膜物理性能的影响,结果表明:环氧树脂用量在15%左右时,改性树脂保留了丙烯酸树脂涂料的优异性能,而且附着力、硬度、光泽得到了提高,丰满度佳。     

聚苯胺/石墨/环氧导电防腐涂层的制备与性能

在环氧涂料中加入石墨和导电聚苯胺(PANI),制备了PANI/石墨/环氧导电涂料。研究了稀释剂的种类和用量对涂料的流平和涂层外观的影响,以及石墨和聚苯胺的添加量对涂层的电导率、硬度、附着力、耐蚀性等性能的影响。结果表明,活性稀释剂不适合制作聚苯胺导电涂料。以m(二甲苯)∶m(正丁醇)=4∶1为混合稀释剂,石墨含量为30%,聚苯胺添加量为环氧树脂的10%,环氧树脂与稀释剂的质量比为1∶1.5时,所得涂层具有良好的导电性和防腐能力,其电导率为1.01×10-4 S/cm,铅笔硬度3H,附着力0级,划痕试样在5%NaCl溶液中浸泡7 d不腐蚀。     

掺杂型聚苯胺导电涂料的研究

研制了一种以环氧树脂为基料,掺杂型聚苯胺为导电填料的导电涂料。研究了导电涂料中掺杂型聚苯胺以及聚酰胺类固化剂对导电涂料性能的影响,并对导电涂料的电阻率、柔韧性及附着力等性能进行了测试。结果表明,该涂料ρ为20~25Ω.cm,具有优良的导电性,且涂膜的柔韧性达到1.0mm。     

自交联含氟乳液与水性环氧树脂共混乳液自分层的研究

为制备出高性能、低成本的含氟树脂,在优选出环氧固化剂的基础上,将含氟乳液与环氧乳液共混,研究了共混乳液间表面张力差、共混工艺、GMA(甲基丙烯酸缩水甘油酯)用量对共混树脂自分层的影响。控制好这些影响因素,利用光电子能谱(XPS)、差示量热扫描(DSC)对共混乳胶膜进行了表征、分析。结果表明,成膜时树脂会产生自分层,表层富集含氟树脂,底层则以环氧树脂为主,中间依靠两种树脂中的反应基团形成过渡层,这样得到的涂膜具有优异的表面性能和良好的附着性能,经一次涂装就能达到底表合一的效果,乳胶膜的附着力达到了1级。该研究成果已顺利通过中试。     

聚苯胺/环氧复合阴极电泳涂料防腐蚀性能的研究

运用插层聚合的方法制备了蒙脱土／聚苯胺复合材料，并进行了表征。将该复合材料通过共混的方式加入聚酰胺／环氧阴极电泳（CED）涂料中配制成聚苯胺／环氧复合阴极电泳涂料，并利用电化学阻抗谱方法对各电泳涂层的防腐性能进行了分析。研究发现：在3．5％NaCl溶液中浸泡10d后，腐蚀介质不能到达涂层／基底金属界面，金属表面没有发生腐蚀反应。随着聚苯胺含量的增加，复合电泳涂膜的阻抗值增加，具有较好的防腐性能。当聚苯胺含量相同时，与掺杂态聚苯胺复合电泳涂膜相比，本征态聚苯胺复合电泳涂膜具有很高的阻抗值，表现出更好的防腐性能。     

Investigation on anticorrosion performance of nano and micro polyaniline in new water-based epoxy coating

In this research, a micro polyaniline (MicroPAni) and a dispersion of nano polyaniline particles (NanoPAni) were used as anticorrosion additive in a new water-based epoxy coating. Both materials were added directly to a new water-based hardener (RIPI-W.B.H.). The resulted mixtures were homogenized and sonicated for size reduction and better particle dispersion. The average particle size of polyaniline in the hardener was determined using dynamic light scattering (DLS). Transmission electron microscopy (TEM) was used to observe the particle size of polyaniline in the final dried film. After applying the coatings on metal surface, anticorrosion performance and adhesion properties of the coatings were compared together with a reference coating using salt spray and cross-cut adhesion tests. The results showed that anticorrosion performance of coating containing NanoPAni was better than the one for coating containing MicroPAni. In addition, investigation on the morphology of metal-coating interface by scanning electron microscopy (SEM) technique in samples containing polyaniline after salt spray test showed stable oxide layer formation on metal surface, which will enhance the corrosion resistance.     

C9石油树脂在环氧防腐涂料中的应用研究

C9石油树脂作为一种价格低廉且用途广泛的原材料,在涂料中的应用前景广阔。讨论了C9石油树脂对环氧防腐涂料的光泽、附着力、耐盐雾性和抗弯曲性的影响。展望了C9石油树脂在重防腐涂料中的应用前景。     

水性自干防腐涂料的制备

以环氧树脂与丙烯酸单体接枝共聚得到的水性自干环氧丙烯酸树脂为防腐涂料基料、钛铁粉为防腐颜料制得水性高效防腐涂料。研究了树脂中环氧树脂的用量、涂料中防腐颜料的种类和用量对涂料防腐性能的影响。结果表明,树脂中环氧树脂E-44的用量为30%、钛铁粉的用量为5%时,防腐涂料具有优异的防腐性能和力学性能。     

有机硅改性丁香酚基环氧稀释剂的合成及性能研究

设计合成了一种低黏度有机硅改性的丁香酚基环氧稀释剂（HSEE）。首先以丁香酚和环氧氯丙烷为原料合成了丁香酚缩水甘油醚（ EE）然后 EE和 1,1,1,3,5,5,5-七甲基三硅氧烷（ HMTS）通过硅氢加成反应制备了 HSEE,并用核磁、红外对,HSEE进行了结构表征。将 HSEE与双酚 A型环氧树脂 E51进行复配,采用脂环胺类固化剂（ PACM）制备高固体分环氧清漆。结果表明： HSEE与环氧树脂 E51有着良好的相容性,共混时无相分离现象,且 E51树脂的黏度随着 HSEE含量的增加而不断降低,当添加量为 20%时,树脂的黏度从 12. 17 Pa·s降低至 1. 72 Pa·s。与纯 E51涂层相比,添加了 HSEE的环氧涂层的柔韧性、耐化学品性和耐腐蚀性能均有所提升。     

Preparation of PANI/epoxy/Zn nanocomposite using Zn nanoparticles and epoxy resin as additives and investigation of its corrosion protection behavior on iron

Conducting polyaniline, zinc and epoxy resin solely have anticorrosive properties by different mechanisms on metallic substrates. In this work the triple hybrid of PANI/epoxy/Zn nanocomposite was prepared as a thin layer coating (70 ± 5 μm) on iron coupons and its anticorrosion performance was investigated in HCl (0.1 M) as corrosive solution. Epoxy resin and zinc nanoparticles were applied as additives in the PANI matrix to improve the mechanical properties of PANI coating and investigate their synergetic effects on the anticorrosion performance of PANI coating. At first PANI/Zn nanocomposite coatings with different Zn contents were prepared and the zinc content optimized so that the coating achieve the best anticorrosion performance. Accordingly the iron coupons coated by PANI/Zn coating having 4 wt% Zn content showed more noble open circuit potential and lower corrosion current values. Then epoxy resin was applied as additive to the optimized formulation of PANI/Zn coating in different weight percents (0–20 wt%) and the anticorrosion performance of the related PANI/epoxy/Zn triple hybrid nanocomposite coatings was evaluated. Results showed that the addition of epoxy resin causes to the decreasing of corrosion current of iron samples coated by PANI/epoxy/Zn nanocomposite. An optimum range of 3–7 wt% was obtained for the epoxy content in the composition of PANI/epoxy/Zn nanocomposite in which the coating exhibits the best anticorrosion performance. Iron metal coupon was elementally analyzed and the PANI/Zn and PANI/epoxy/Zn nanocomposites were characterized using Fourier Transform Infrared spectroscopy, X-ray diffraction patterns and Scanning Electron Microscopy techniques.     

双组分水性环氧防腐涂料的研制

采用双酚A型环氧树脂与非离子表面活性剂反应,合成了反应型水性环氧乳化剂,将具有表面活性的分子链段引入到环氧树脂分子链中,用相反转技术制备水性环氧树脂乳液。为了改善乳液与固化剂的相容性,合成了聚醚型水性环氧树脂固化剂,用其制备的双组分水性环氧防腐涂料具有优异的机械性能、耐水性、耐盐水性及耐盐雾性。     

聚苯胺颗粒对水性环氧树脂涂层防腐性能的影响

以盐酸为掺杂剂、过硫酸铵为氧化剂、咪唑类离子液体为稳定剂,采用化学氧化聚合法合成了导电聚苯胺(PANI)颗粒,将其分散到水性环氧树脂(ER)中制成聚苯胺水性环氧防腐涂层,研究了聚苯胺颗粒对涂层防腐性能和机械性能的影响。结果表明,添加聚苯胺显著提高了水性环氧涂层的阻隔性能,信号频率f=0.01 Hz时,PANI/ER涂层的阻抗(|Z|f=0.01Hz)均高于纯ER涂层。添加5.0wt% PANI时ER涂层阻隔性能最好,浸泡0~168 h时|Z|f=0.01Hz稳定在约8.0×108 Ω?cm2,浸泡168 h后|Z|f=0.01Hz=7.5×108 Ω?cm2,远高于ER和其它PANI/ER体系。中性盐雾实验结果表明,聚苯胺赋予了涂层钝化腐蚀的能力,显著提高了涂层的防腐性能,且其添加量越高,防腐性能越好。弯曲和冲击实验结果表明,涂层的机械性能随聚苯胺含量增加先上升后降低,当聚苯胺添加量不超过5.0wt%时,涂层的机械性能优异,附着力和韧性均较好;PANI添加量增至7.0wt%时,ER涂层的脆性明显变大,机械性能下降。聚苯胺在水性环氧体系中的最宜添加量为5.0wt%,此时涂层的机械性能良好,综合防腐性能最优。     

Investigation of corrosion protection performance of epoxy coatings modified by polyaniline/clay nanocomposites on steel surfaces

In this study, polyaniline (PANI) and polyaniline/clay nanocomposites were prepared via in situ oxidative polymerization. The morphology of nanocomposites structures was investigated by X-ray diffraction (XRD). The chemical structures of PANI and PANI/clay nanocomposites were examined via Fourier transform infrared (FT-IR) spectroscopy. Polyaniline-based pigments were introduced into epoxy paint and applied on steel substrates. The effect of clay addition and the type of clay cation, including Na⁺ in natural clay (MMT) and alkyl ammonium ions in organo-modified montmorillonite (OMMT), on the anticorrosion performance of epoxy-based coatings was investigated through electrochemical Tafel test, electrochemical impedance spectroscopy and immersion measurements in NaCl solution. The stability of the adhesion of the neat and modified epoxy coatings to the steel surface was also examined. The results indicated that introduction of PANI/OMMT nanocomposite into epoxy paint results in improved anticorrosion properties in comparison with PANI/MMT and neat PANI.     

环氧改性氯化聚烯烃含氟防腐涂料的制备和性能研究

介绍了采用以环氧树脂、过氯乙烯树脂、聚四氟乙烯及颜料等原料制成的主剂,配以聚氨酯预聚物为固化剂的双组分涂料的制备及其性能研究。结果表明,该涂料的涂膜具有优异的耐酸碱性能及耐候性,对金属基体和混凝土基体有较强的附着力,可用于化工大气环境的防腐。且添加纳米聚四氟乙烯对降低涂膜的表面张力有显著的作用。