柠檬酸交联魔芋葡甘聚糖多孔材料的制备及机械性能  

The Preparation and Mechanical Properties of Konjac Glucomannan Porous Material Crosslinked with Citric Acid

作　　者：刘俊成 宋瑗瑗 王倩 郑剑伟 蒋革[1] LIU Juncheng;SONG Yuanyuan;WANG Qian;ZHENG Jianwei;JIANG Ge(School of Life Science and Technology, Dalian University, Dalian 116622, China)

机构地区：[1]大连大学生命科学与技术学院,大连116622

出　　处：《华南师范大学学报（自然科学版）》2022年第1期42-47,共6页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(21571025)。

摘　　要：采用来源广泛且廉价的魔芋葡甘聚糖(KGM)为原料,通过不同温度(5~85℃)使柠檬酸(CA)与KGM形成交联的CA-KGM多孔材料。分别考察了KGM加入量、CA加入量、反应温度及反应时间对CA-KGM机械性能的影响;以这3个因素为考察对象进行正交优化实验;通过扫描电子显微镜观察产品形貌。结果表明:合适的KGM和CA加入量、温度及反应时间才能得到黏度适宜、吸水率较好、机械性能强的CA-KGM多孔材料。通过优化实验条件,在KGM质量浓度10 g/L、CA质量浓度10 g/L、反应温度65℃、反应时间2 h条件下得到的CA-KGM拉伸强度为0.95 MPa、断裂伸长率为16.7%。Konjac glucomannan(KGM)is used as raw material to crosslink KGM(CA-KGM)with citric acid(CA)at different temperatures(5~85℃).The effects of KGM addition,CA addition,reaction temperature and reaction time on the mechanical properties of CA-KGM porous materials are investigated.Orthogonal optimization experiments are carried out to study these three factors.At the same time,the morphology of the product is investigated with the scanning electron microscope.The results show that CA-KGM porous materials with good viscosity,water absorption and strong mechanical properties can be obtained only with appropriate amount of KGM and CA addition,appropriate temperature and appropriate reaction time.By optimizing the test conditions,with KGM mass concentration of 10 g/L,CA mass concentration of 10 g/L,reaction temperature of 65℃and reaction time of 2 h,the tensile strength of CA-KGM reaches 0.95 MPa and the elongation at break reaches 16.7%.

关 键 词：魔芋葡甘聚糖 柠檬酸 交联 多孔材料 机械性能 

分 类 号：O636.1[理学—高分子化学] R318.08[理学—化学]