CoCl_2-PVA可逆热敏微胶囊的制备与性能  

Preparation and Properties of CoCl_2-PVA Reversible Thermosensitive Microcapsules

作　　者：张凤[1] 管萍[1] 胡小玲[1] 郜捷[1] 

机构地区：[1]西北工业大学理学院化学系教育部空间材料与物理重点实验室,西安710129

出　　处：《功能高分子学报》2011年第4期416-421,共6页Journal of Functional Polymers

摘　　要：以低温可逆热敏示温材料氯化钴(CoCl2)为芯材、聚乙烯醇(PVA)为壳材、戊二醛(GA)为交联剂,在W/O/W混合乳液体系中,通过界面交联法制备了CoCl2-PVA可逆热敏示温微胶囊,并对其各项性能进行了系统研究。结果表明:当PVA溶液的质量分数为0.8%、PVA与GA摩尔比为1∶2.5、内水相pH为2、CoCl2溶液的质量分数为13.65%时,微胶囊的可逆热敏示温性能优良,且示温性能基本不受空气湿度、有机溶剂、酸、碱等环境条件的影响,在反复升、降温60次后,仍能保持良好的热敏示温性能。以微胶囊为颜料,按PVA与GA摩尔比为1∶1与丝印油墨混合制备的可逆示温油墨示温性能优良。The reversible thermochromic microcapsules were prepared in W/O/W multiple emulsion systems by interfacial crosslinking with CoCl2 as core,polyvinyl alcohol（PVA） as shell and glutaric dialdehyde（GA） as crosslinker.The properties of reversible thermochromic microcapsules were systematically discussed.Results showed that CoCl2/PVA-GA microcapsules prepared in the condition of PVA mass fraction 0.8%,the mole ratio of PVA to GA 1.0∶2.5,in internal aqueous phase pH=2,mass fraction of CoCl2 13.65%,possess distinct thermochromic performance which basically does not suffer from the effect of air humidity,organic solvents,acids,alkalis and environmental conditions.They also kept fine thermochromic performance through recycled rising and declining the temperature for 60 times.The printing ink was prepared under the mole ratio of microcapsules to printing ink 1∶1 and thermal sensitive effect is excellent.

关 键 词：可逆 示温材料 热敏 微胶囊 性能 

分 类 号：TQ630[化学工程—精细化工]