【作者】 徐金龙；

【导师】 曹维良；

【作者基本信息】 北京化工大学 ， 工业催化， 2002， 硕士

【摘要】 涂料喷涂过程中挥发性有毒气体的排放是造成大气污染的主要来源之一。为了减少污染，本文对用超临界二氧化碳替代涂料中有毒溶剂，开发新型绿色涂料技术进行了理论研究。 本文首先对超临界流体与溶质之间的相互作用进行了研究，通过对偏摩尔体积的测量，证明了在临界区体系中存在超临界流体与溶剂的强的相互作用，有分子聚集体的存在，从而导致体系局部密度的增加，这样溶质在溶剂中的溶解度将大大增加。从而为超临界二氧化碳能够溶解在聚合物树脂中作了理论基础的铺垫。 然后进行了丙烯酸涂料树脂(高氯化聚乙烯涂料树脂)-二氧化碳-共溶剂的三元相行为研究，揭示了组分性质、配比、温度和压力等因素对相行为的影响规律。探讨了温度、压力等因素对溶解度的影响，并对共溶剂性质增强溶质溶解度的机理进行了研究。最后确定了涂料树脂-溶剂-超临界二氧化碳的三组分相图，确定了超临界喷涂涂料各组分的配比，分析了不同涂料树脂三元相图不同的原因，为超临界二氧化碳涂料的实际应用提供了理论依据。更多还原

【Abstract】 The volatile organic content (VOC) emission in coating application is an important source of air pollution. In this paper, we had theoretical study on developing green coating for supercritical carbon dioxide in place of poisonous solvent in order to prevent environment pollution.The interaction of supercritical fluid (SCF) and solute was investigated at first, the partial molar volume of SCF-n-butyl acetate was measured. The experiment result shows that there must be the interaction of solutes and supercritical carbon dioxide, and molecular congeries in the system, so it results in partial density increasing and the solubility of solutes will be enhanced. Thereby there is theoretical basis for supercritical carbon dioxide dissolving into polymer resin.At last, study on the phase behavior of acrylic acid resin or high chloridized polyethylene (HCPE)-CO2-cosovlent was made, which shows rules about effect of component’s character, ratio, temperature and pressure on the phase behavior. Effect of temperature and pressure on CO2 solubility is discussed, and mechanism is studied for co-solvent to increase the solute solubility. In the end, the ternary phase diagram of coating resin-solvent-CO2 was plotted. The component ratio of supercritical spray coatings was fixed, and the reason of different diagram for different coating resin was interpreted, which provided the theoretical basis for the application of supercritical CO, coating.更多还原