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
姜林旭 1王晓广 2夏发明 3方可 4苏小雅4
作者信息
- 1. 武汉纺织大学,湖北 武汉 430200
- 2. 武汉纺织大学,湖北 武汉 430200;湖北顶新环保生物质材料有限公司,湖北 黄石 435200
- 3. 湖北顶新环保生物质材料有限公司,湖北 黄石 435200
- 4. 武汉纺织大学,湖北 武汉 430200;山东润泉生物科技有限公司,山东 枣庄 277000
- 折叠
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.
Abstract
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Key words
Ca-GMMT/TPS/Mechanical properties/Thermal stability/Hydrophobicity引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据