摘要
以聚己内酯二元醇(PCL)、甲苯二异氰酸酯(TDI)、甲基丙烯酸甲酯(MMA)为主要原料,合成水性聚氨酯-丙烯酸酯乳液(WPUA)预聚体。将偶联改性的纳米SiO2与氧化石墨烯进行接枝后,与聚氨酯-丙烯酸酯乳液预聚体进行原位聚合,用自乳化法制备了经功能化石墨烯改性的无胺型水性聚氨酯-丙烯酸酯复合乳液(SiO2-NH2-GO/WPUA),对功能化石墨烯的用量进行讨论,并对其复合乳液、胶膜结构及性能进行测试。与水性聚氨酯-丙烯酸酯(WPUA)相比,SiO2-NH2-GO/WPUA具有更好的耐温性及胶膜性能,当氧化石墨烯接枝SiO2(SiO2-NH2-GO)质量分数为0.75%时,复合乳液胶膜较未改性乳液胶膜相比,热分解温度提高14.51℃;拉伸强度提高到81.28 MPa;该复合乳液配制的胶黏剂在铝箔/PVC薄膜的T-剥离强度达到15.4 N;易氧化物含量指标符合药品包装容器标准,表明该水性聚氨酯胶黏剂适用于医药包装。
A water-borne polyurethane-acrylate emulsion(WPUA) prepolymer was synthesized by using polycaprolactone diol(PCL), toluene diisocyanate(TDI) and methyl methacrylate(MMA) as main raw materials. After the coupling modified nano-SiO2 was grafted with graphene oxide, it polymerized with the polyurethane prepolymer in situ to prepare amine-free waterborne polyurethane-acrylate composite(SiO2-NH2-GO/WPUA) emulsions modified by functionalized graphene. The amount of functionalized graphene was discussed, and the composite emulsions and films were tested and characterized. Compared with waterborne polyurethane-acrylate(WPUA), SiO2-NH2-GO/WPUA had better temperature resistance and film properties. When the SiO2-NH2-GO mass fraction was 0.75%, the thermal decomposition temperature of the prepared SiO2-NH2-GO emulsion film was 14.51 ℃ higher than that of unmodified emulsion film. The tensile strength was increased to 81.28 MPa. The T-peel strength of the adhesive prepared by the composite emulsion in aluminum foil/PVC film reached 15.4 N. The indexes such as easy oxide met the standard of pharmaceutical packaging containers, indicating that this waterborne polyurethane adhesive was suitable for pharmaceutical packaging.
作者
刘佳慧
赖小娟
王磊
张引引
LIU Jia-hui;LAI Xiao-juan;WANG Lei;ZHANG Yin-yin(Shaanxi Province Key Laboratory of Light Chemical Additives,Shaanxi University of Science & Technology,Xi'an 110021,Shaanxi,China;Shawvci Agricultural Products Processing Technology Research Institute,Xi'an 710021,Shaanxi,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2019年第6期1076-1083,共8页
Fine Chemicals
基金
国家自然科学基金(51103081)
陕西省工业科技攻关项目(2014K08-11和2016GY-241)
陕西省教育厅重点实验室项目(17JS012)
陕西省青年科技新星项目(2018KJXX-023)
西安市科技计划项目(2017068C和201805024YD2CG8)~~
关键词
水性聚氨酯聚丙烯酸酯
氧化石墨烯
硅烷偶联剂
原位聚合
热分解
医药包装
功能材料
waterborne polyurethane polyacrylate
graphene oxide
silane coupling agent
in situ polymerization
thermal decomposition
pharmaceutical packaging
functional materials
