水溶性环氧树脂体系的氧化锆凝胶浇注成型(英文)  

GELCASTING OF ZIRCONIA USING WATER SOLUBLE EPOXY RESIN AS GEL FORMER

作　　者：董满江[1] 毛小建[1] 张兆泉[1] 刘茜[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,高性能陶瓷和超微结构国家重点实验室,上海200050

出　　处：《硅酸盐学报》2008年第7期1000-1003,共4页Journal of The Chinese Ceramic Society

基　　金：中国科学院知识创新工程青年人才领域前沿项目(SCX200706)

摘　　要：研究了氧化锆凝胶浇注成型工艺中,水溶性环氧树脂凝胶剂对浆料的流变性和固化过程的影响。结果表明:环氧树脂的加入增加了浆料的黏度,但可制备固体含量为53.7%(体积分数),黏度为0.60Pa·s(剪切速率为100s-1),适合浇注的浆料;为得到较高弹性模量的凝胶,固化剂(二丙三胺)最佳加入量为3.4%(质量分数);环氧树脂溶液的聚合过程和氧化锆浆料的固化过程对温度都具有较大的依赖性,利用这些依赖性可控制浆料的制备、浇注和固化过程。30℃时,浆料中环氧树脂的聚合反应在8min后开始,20min后浆料失去流动性,1h后浆料完全固化,湿坯弹性模量达到1.96MPa。固化温度越高,浆料固化越快,固化后湿坯的弹性模量就越高。Water soluble epoxy resin was used as gel former in the zirconia gelcasting process. The rheological properties and gelation behavior of the zirconia slurry were investigated. The rheological data shows that the slurry viscosity increases in the presence of epoxy resin. For the slurry with a solid phase content of 53.7% （in volume）, the acceptable viscosity is about 0.60 Pa.s at 100 s^-1. In order to obtain high elastic modulus polymer gel, the optional hardener （dipropylentfiamin） content is 3.4% （in mass）. Since the polymerization and gelation process depends greatly on the temperature, the gelation process can be controlled by controlling the temperature. At 30℃, the polymerization of epoxy resin in the slurry begins at 8 min. The slurry loses fluidity after 20 min, and slurry solidification is completed within 1 h at 30-40℃. The elastic modulus （G′）of the wet green bodies is 1.96MPa. Compared with gelation at 30℃, the gelation process is hastened by higher temperature and results in higher G′ of wet green bodies.

关 键 词：凝胶浇注成型 氧化锆 水溶性环氧树脂 凝胶剂 流变性 

分 类 号：TQ174[化学工程—陶瓷工业]