水性油墨用丙烯酸酯树脂的改性研究进展

首先从环保油墨的种类出发,介绍了水性油墨(WI)连接料用水性丙烯酸树脂(WAR)的优缺点;然后从功能单体改性WAR、WAR与其他树脂共聚、改善乳液聚合工艺和加入纳米颗粒等方面,论述了WI用WAR的改性研究;最后对WI的发展前景进行了展望。     

水性丙烯酸树脂的改性研究进展

从水性丙烯酸树脂改性所用功能性单体(或树脂)和聚合工艺2个方面对水性丙烯酸树脂改性的研究现状进行了综述,并对研究中存在的问题提出了看法和建议.     

常温固化耐高温环氧改性有机硅聚氨酯防腐蚀涂料的研制

采用环氧601树脂和自制低相对分子质量有机硅树脂进行共缩合反应制得环氧树脂改性有机硅树脂,并以此改性树脂为基料,加入颜料、功能性填料、助剂等研制出耐高温自干型环氧改性有机硅聚氨酯防腐蚀涂料.讨论了树脂和涂料配方的组成及其制备工艺对其性能的影响.     

GS改性氧化石墨烯/聚苯胺防腐材料的制备及性能

用双子表面活性剂(GS)通过静电作用对氧化石墨烯(GO)进行插层改性制备了改性氧化石墨烯(GSGO),再以苯胺(An)为单体,过硫酸铵(APS)为引发剂,通过原位聚合法制备了GSGO/PANI复合材料。最后利用GSGO/PANI与水性醇酸树脂(WAR)共混得到了GSGO/PANI/WAR防腐涂层。采用FTIR,Raman,XRD和SEM等测试手段对GSGO和复合材料的形貌、结构进行了表征,结果表明,GS插入到GO的片层中,使得GSGO的层间距增大,且棒状的聚苯胺分散在GO的片层中,形成片状插层结构。动电位极化和电化学阻抗谱测试表明,GSGO/PANI/WAR 复合涂层比纯WAR涂层具有更高的耐腐蚀性能。当复合涂层中w(GSGO)=10% 时,涂层的耐腐蚀性能最好。腐蚀电流密度从9.82?10-6A/cm2减小至1.08?10-6A/cm2,腐蚀电从-0.56V增加到-0.28V,|Z|值可达到5.25?106 ohm.cm2。     

氰酸酯树脂增韧改性研究进展

主要介绍了氰酸酯(CE)树脂的增韧机制,综合分析了国内外CE树脂的增韧改性研究成果(包括热固性树脂改性CE、热塑性树脂改性CE、橡胶弹性体改性CE和纳米无机材料改性CE等),并对CE树脂的发展前景进行了展望。     

氰酸酯树脂改性的研究进展

简要介绍了氰酸酯的缺陷,并综述了用各种方法对氰酸酯树脂改性的研究进展,包括热固性树脂改性(环氧树脂改性和双马来酰亚胺树脂改性)、热塑性树脂改性、橡胶弹性体改性、互穿网络聚合物改性以及物理改性法。     

双马来酰亚胺树脂的研究进展

综述了近年有关双马来酰亚胺(BMI)树脂的改性现状和研究进展,主要包括胺类化合物改性、烯丙基类化合物改性、热塑性树脂改性、热固性树脂改性、无机功能材料改性、微胶囊改性、纳米金属氧化物改性、含磷氧化物改性、生物改性等,并对BMI树脂今后的发展趋势进行了分析和展望。     

苯并噁嗪树脂基复合材料研究进展

介绍了苯并噁嗪(BZ)树脂基复合材料的研究进展,包括无机颗粒材料改性[如MMT(蒙脱土)改性、不完全POSS(笼型倍半硅氧烷)改性、碳纳米材料改性和蛭石改性等]、纤维材料改性(如玻璃纤维改性、碳纤维改性和其他纤维改性等)以及橡胶改性;综述了改性BZ树脂基复合材料的改性机制。最后,对改性BZ树脂基复合材料的研究方向进行了展望。     

BMI树脂增韧改性的方法及新进展

综述了双马来酰亚胺树脂(BMI)增韧改性的主要方法及最新研究进展,主要包括胺类化合物改性、烯丙基化合物改性、橡胶改性、石墨烯改性、热塑性树脂改性、热固性树脂改性等方法。并对BMI树脂未来的发展趋势进行了分析。     

改性氧化石墨烯/聚苯胺防腐材料的制备及性能

用双子表面活性剂(GS)对氧化石墨烯(GO)进行插层改性,制备了改性氧化石墨烯(GSGO),再以苯胺(An)为单体,过硫酸铵(APS)为引发剂,通过原位聚合法制备了GSGO/PANI复合材料,最后利用GSGO/PANI与水性醇酸树脂(WAR)共混得到了GSGO/PANI/WAR防腐涂层。采用FTIR、Raman、XRD和SEM等对GSGO和复合材料的形貌、结构进行了表征。结果表明,GS插入到GO的片层中,使得GO的层间距增大,且棒状的聚苯胺分散在GO的片层中,形成片状插层结构。动电位极化和电化学阻抗谱测试表明,GSGO/PANI/WAR复合涂层比纯WAR涂层具有更高的耐腐蚀性能。当复合涂层中GSGO含量为10%(以An的质量为基准,下同)时,GSGO/PANI/WAR-2涂层的耐腐蚀性能最好,极化电阻为7.98×107?·cm2;腐蚀速率为1.26×10–4 mm/a,阻抗值|Z|可达到5.25×106?·cm2。与纯WAR相比,其腐蚀电流密度从9.82×10–6A/cm2减小至1.08×10–8 A/cm2,腐蚀电位从–0.56 V增加到–0.28 V。     

水性油墨用丙烯酸酯树脂的改性研究进展

对水性油墨用水性丙烯酸树脂连接料的性能、特点及存在问题进行分析.从引入功能单体改性丙烯酸树脂、将丙烯酸树脂与其它树脂共聚、改善乳液聚合乳化剂体系和添加纳米无机粒子等方面,介绍了近几年水性油墨用丙烯酸树脂改性研究的进展情况.展望了丙烯酸树脂改性研究的发展方向.     

交联改性苯丙乳液在水性油墨中的应用

分别以邻苯二甲酸二烯丙酯(DAP)、杂环甲基丙烯酸酯单体(TRM WAM Ⅲ)和乙酰乙酸基甲基丙烯酸乙酯(AAEMA)作为传统苯丙乳液的交联改性剂,采用预乳化半连续乳液聚合法制备交联改性苯丙乳液;然后以此为连接料,制备水性油墨.研究了传统苯丙乳液、交联改性苯丙乳液以及进口同类产品对水性油墨的摩擦牢度、稳定性能和耐水性能...     

高性能水性环氧防腐涂料的研究

采用自主开发的水性环氧乳液和固化剂体系制备高性能水性环氧防腐涂料,对涂料中颜基比、功能颜填料、功能助剂等影响因素进行了研究。试验结果表明:当PVC和磷酸锌在涂料中含量分别为25%和15%时,含量为0.35%的有机酸钠盐类防锈蚀剂可获得高性能的水性环氧防腐涂料。     

Uptake of sodium chloride by mixture of weakly acidic and weakly basic ion exchange resins: equilibrium and kinetic studies

The equilibrium and kinetic behaviour of weakly acidic resin (WAR) with alkali and weakly basic resin (WBR) with acids have been studied by many research teams. But little work is reported in literature regarding equilibrium and kinetic behaviour of mixture of WAR and WBR.In the present study, detailed analysis of equilibrium and kinetic behaviour of mixed resins with sodium chloride has been undertaken. From equilibrium studies, no adsorption is observed taking place, when salt solution is brought in contact with WAR or WBR individually; however adsorption is observed taking place, when salt solution is brought in contact with the mixture of WAR and WBR. The salt uptake depends on the concentration of salt solution, the amounts of individual ion-exchange resins as well as their proportion.Mixture of resins and salt solution has three phases interacting with each other and a number of resistances can influence salt uptake rate either individually or in combination. A series of possible resistances to the salt uptake are identified, namely, diffusion across films surrounding the resin particles, diffusion inside the resin particles, and dissociation of carboxylic group (-COOH) in WAR.To minimize the mathematical complexity, limiting case approach is adopted in this study. The underlying assumption in this approach is that resistance to the entire process lies in that limiting step.It is finally concluded that generation of H⁺ ions (by interaction of WAR particles and salt solution) followed by adsorption of acid by WBR governs the salt uptake process in mixed resin systems.     

Highly protective performance of water-based epoxy coating loaded with self-doped nanopolyaniline synthesized under supercritical CO2 condition

In this study corrosion properties of water-based epoxy coating on carbon steel (CS) are improved by adding self-doped nano-polyaniline (SPAni) synthesized under supercritical carbon dioxide (ScCO₂) condition. The modified ScCO₂-synthesized SPAni using water-based polyamidoamine hardener results in formation of the water-based SPAni composite (Sc-WB). To obtain the water-based polyaniline epoxy coating (SP-WBE), the Sc-WB was mixed with epoxy resin in stoichiometric ratio. Applying SP-WBE on CS substrate resulted in high improvement in corrosion properties compared to the similar coating without SPAni. Formation of oxide layers and adhesion properties of SP-WBE at corrosive medium were evaluated using scanning electron microscope (SEM). The transmission electron microscope (TEM) was used to observe the distribution and particles size of nanopolyaniline in the final dried film. The anti-corrosion performance of water-based epoxy coating (blank sample) and SP-WBE coating on CS substrates were studied using salt spray standard test according to ASTM B-117, electrochemical impedance spectroscopy (EIS) and adhesion tests. EIS studies, after 1800 hrs of exposure to corrosive solutions, result in charge transfer resistance of 1.816E9 Ω and 8.64E7 Ω for SP-WBE and blank samples, respectively.     

功能性丙烯酸酯乳液的制备与应用研究进展

介绍了核-壳乳液聚合、乳液互穿聚合物网络、无皂乳液聚合、微乳液与细乳液聚合等方法与技术在制备功能性丙烯酸酯乳液中的应用。阐述了有机硅、有机氟、聚氨酯、环氧树脂等改性方法用于制备功能性丙烯酸乳液的研究进展。详细介绍了功能性丙烯酸乳液在功能涂料、胶黏剂、皮革涂饰剂、油墨等领域的应用现状,提出了功能性丙烯酸酯乳液的发展趋势：采用新的聚合技术、改性技术制备具有附加值高、性能优异且环境友好的水性功能性乳液是今后丙烯酸酯乳液的主要发展方向。     

有机硅改性热反应型水基聚氨酯

用氨丙基聚硅氧烷与PU预聚体反应生成合硅氧烷的PU预聚体，通过NaHSO3封闭NCO基，并在水中分散制得有机硅改性热反应型水基聚氨酯乳液。考察了有机硅含量对封闭率和解封速率以及乳液粒径的影响。     

外交联功能型丙烯酸乳液涂料的制备

为了制备常温外交联水性丙烯酸乳液涂料,提高其涂层的交联密度和综合性能,首先以丙烯酸酯类为主要单体,十二烷基磺酸钠、辛烷基酚聚氧乙烯醚和烷基二苯醚二磺酸钠为复合乳化剂,用核壳乳液聚合的方法合成具有外交联特性的水性丙烯酸功能乳液.然后用聚酰胺环氧氯丙烷(PAE)外交联剂对乳液进行交联改性.研究结果表明:胶膜的交联度、硬度、...