非冻结水对微球复合水凝胶机械性能的影响  

Effect of Non-freezing Water on the Mechanical Properties of Microspherical Composite Hydrogels

作　　者：梁学称 邓裕坤 裴小朋 翟侃侃 徐昆[1] 谭颖[1] 王丕新[1] LIANG Xuechen;DENG Yukun;PEI Xiaopeng;ZHAI Kankan;XU Kun;TAN Ying;WANG Pixin(Key Laboratory of Polymer Ecomaterials,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China;University of Chinese Academy of Sciences,Beijing 100049,China;University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学院长春应用化学研究所,中国科学院生态环境高分子材料重点实验室,长春130022 [2]中国科学院大学,北京100049 [3]中国科学技术大学,合肥230026

出　　处：《应用化学》2018年第11期1301-1308,共8页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(51673191,21774124);吉林省科技发展计划项目(20160101306JC,201603101YY)资助。

摘　　要：本文旨在用DSC的方法研究水凝胶结合水的能力与韧性的关系。分别以甲基丙烯酸丁酯(BMA)或甲基丙烯酸六氟丁酯(HFBMA)和烯丙基胺为单体,制备了2种核壳纳米微球(BMA微球和HFBMA微球)。再以其作为大分子引发剂和交联剂,制备了微球交联复合水凝胶(BMA-H凝胶和HFBMA-H凝胶)。通过差示扫描量热仪(DSC)、傅里叶变换红外光谱仪(FTIR)和透射电子显微镜(TEM)等技术手段研究凝胶的结构和性能。结果表明,HFBMA-H凝胶具有更好的机械性能,其拉伸强度和断裂伸长率分别可达280 k Pa和3960%,远高于BMA-H凝胶(101 k Pa,2700%)。通过对2种复合凝胶体系内不同状态的水进行分析,发现HFBMA-H凝胶的非冻结水的质量分数明显高于BMA-H凝胶,这种非冻结水的增塑作用对于凝胶机械强度的提升具有重要影响。The aim of this paper is to study the relationship between the ability to combine water and the toughness of hydrogel by means of differential scanning calorimetry(DSC).N-butyl methacrylate(BMA)or 2,2,3,4,4,4-hexafluorobutyl methacrylate(HFBMA)and allylamine were chosen as monomers to synthesize core-shell nanospheres(named BMA nanosphere or HFBMA nanosphere).Then,the two nanospheres were used as macromolecular initiators and crosslinking agents to prepare nanospherical composite hydrogels(named BMA-H hydrogel or HFBMA-H hydrogel).DSC,Fourier transform infrared spectrometer(FTIR)and transmission electron microscopy(TEM)were used to characterize the structures and properties of hydrogels.The results of mechanical performance analysis indicate that the HFBMA-H hydrogel has better mechanical properties and its tensile strength and fracture elongation are up to 280 kPa and 3960%,respectively,which are much higher than those of BMA-H hydrogel(101 kPa,2700%).DSC was used to investigate the state and proportion of water in composite hydrogels with different kinds of nanospheres.The results show that the non-freezing water content of HFBMA-H hydrogel is far higher than that of BMA-H hydrogel under the same water content,and the plasticizing effect of non-freezing water has an important effect on the mechanical strength of the hydrogel.

关 键 词：核壳微球 复合水凝胶 差示扫描量热法 非冻结水 

分 类 号：O631.1[理学—高分子化学]