摘要
采用溶液共混的方法,利用有机改性蒙脱土(OMMT)和云母(Mica)层状硅酸盐无机填料对生物可降解聚(丁二酸丁二醇-共-左旋乳酸酯)(PBSLA)共聚酯进行复合改性,对PBSLA/层状硅酸盐复合材料的热学性能、结晶性能、阻隔性能和力学性能进行研究。结果表明:层状硅酸盐填料的质量分数低于4%时,其在共聚酯基体中分散性良好。无机填料充当异相成核剂的作用,在一定程度上改善了基体材料的结晶性能。力学性能方面,一定量的层状硅酸盐填料起增强作用。当OMMT和Mica的添加量分别为2%和3%时,复合材料的拉伸强度达到最大值,较PBSLA可分别提升18.4%和34.4%。层状结构有效增加了气体分子的曲折路径,随着填料含量的增加,复合材料的水蒸气和氧气透过系数均呈现下降趋势。因此,层状硅酸盐填料的加入可以提高PBSLA基体材料的阻隔性能。
Biodegradable poly(butanediol succinate-co-L-lactate)(PBSLA) copolyesters were modified using organic modified montmorillonite(OMMT) and Mica layered silicate inorganic fillers in solution blending method.The thermal properties,crystallization properties,barrier properties and mechanical properties of PBSLA/laminosilicate composites were studied.The results show that when the mass fraction of the layered silicate filler is less than 4%,its dispersion in copolyester matrix is good.The inorganic filler acts as the heterogeneous nucleating agent,which improves the crystallization property of the matrix material to some extent.In terms of mechanical properties,a certain amount of layered silicate filler plays an enhanced role.When the addition of OMMT and Mica is 2% and 3%,respectively,the tensile strength of the composites reache the maximum value,and can be increased by 18.4% and 34.4% compared with PBSLA,respectively.The layered structure effectively increases the zigzag path of gas molecules.With the increase of filler content,the water vapor and oxygen permeability coefficients of the composite show a downward trend.Therefore,the addition of layered silicate fillers can improve the barrier properties of PBSLA matrix materials.
作者
宋平
田卫花
尚敬诏
魏志勇
SONG Ping;TIAN Wei-hua;SHANG Jing-zhao;WEI Zhi-yong(School of Materials Science and Engineering,North University of China,Taiyuan 030051,China;Department of Polymer Science and Engineering,School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China)
出处
《塑料科技》
CAS
北大核心
2024年第7期109-114,共6页
Plastics Science and Technology
基金
辽宁省科技厅重大攻关项目(2022JH1/10400022)。
