Ca-GMMT含量对热塑性淀粉性能的影响  

Effect of Ca-GMMT Content on Performance of Thermoplastic Starch

作　　者：姜林旭 王晓广[1,2] 夏发明 方可 苏小雅 JIANG Lin-xu;WANG Xiao-guang;XIA Fa-ming;FANG Ke;SU Xiao-ya(Wuhan Textile University,Wuhan 430200,China;Hubei Dingxin Environmental Protection Biomass Materials Co.,Ltd.,Huangshi 435200,China;Shandong Runquan Biotechnology Co.,Ltd.,Zaozhuang 277000,China)

机构地区：[1]武汉纺织大学,湖北武汉430200 [2]湖北顶新环保生物质材料有限公司,湖北黄石435200 [3]山东润泉生物科技有限公司,山东枣庄277000

出　　处：《塑料科技》2024年第2期90-93,共4页Plastics Science and Technology

摘　　要：文章采用钙基蒙脱土(Ca-MMT)与丙三醇在恒温油浴的条件下制备Ca-GMMT悬浮液,将Ca-GMMT与丙三醇、淀粉按一定的比例在双螺杆挤出机的高温热剪切下制备复合热塑性淀粉(TPS)。分析了Ca-GMMT的填充量对TPS材料各项性能的影响。结果表明:Ca-GMMT的添加大幅提升TPS材料的拉伸强度。Ca-GMMT的添加并未改变TPS的结晶情况。Ca-GMMT的添加改善了TPS材料的热稳定性,Ca-GMMT添加量为8%时,TPS的初始热分解温度与热分解最大速率温度由TPS的288.6℃、312.2℃分别提升至304.3℃、321.8℃。玉米淀粉中的支链淀粉进入MMT的片层结构,形成更加紧密的结构,但Ca-GMMT添加过多会形成团聚结构,影响复合材料的相容性。Ca-GMMT的添加大幅提升TPS材料的亲水性,当Ca-GMMT添加量达到8%时,TPS材料由亲水性改变为疏水性。Ca-GMMT suspension was prepared by calcium-based montmorillonite(Ca-MMT)and glycerol in a constant temperature oil bath.The composite thermoplastic starch(TPS)was prepared by Ca-GMMT,glycerol and starch in a certain proportion under high temperature hot shear of twin screw extruder.The effect of Ca-GMMT filling amount on the properties of TPS materials was analyzed.The results show that the addition of Ca-GMMT can greatly improve the tensile strength of TPS materials.The addition of Ca-GMMT does not change the crystallization of TPS.The addition of Ca-GMMT improves the thermal stability of TPS materials.When the addition amount of Ca-GMMT is 8%,the initial thermal decomposition temperature and the maximum thermal decomposition rate temperature of TPS increase from 288.6℃and 312.2℃of TPS to 304.3℃and 321.8℃,respectively.The amylopectin in corn starch will enter the lamellar structure of MMT to form a tighter structure,but the addition of too much Ca-GMMT will form a agglomerated structure,which will affect the compatibility of the composites.The addition of Ca-GMMT can greatly improve the hydrophilicity of TPS materials,and when the addition of Ca-GMMT reaches 8%,the TPS material changed from hydrophilic to hydrophobic.

关 键 词：钙基蒙脱土 热塑性淀粉 力学性能 热稳定性 亲疏水性 

分 类 号：TB332[一般工业技术—材料科学与工程]