不同表面性质SiO_(2)对热塑性木薯淀粉/LDPE复合材料薄膜的力学性能和结构影响  

Influence of SiO_(2) with different surface properties on the mechanical property and structure of thermoplastic cassava starch/LDPE composite film

作　　者：刘钰馨 梁家能 梁泽升 廖梁燕 Liu Yuxin;Liang Jianeng;Liang Zesheng;Liao Liangyan(College of Chemistry and Materials,Nanning Normal University,Guangxi Key Laboratory of Natural Polymer Chemistry and Physics,Nanning 530001)

机构地区：[1]南宁师范大学化学与材料学院,广西天然高分子化学与物理重点实验室,南宁530001

出　　处：《化工新型材料》2022年第5期266-269,共4页New Chemical Materials

基　　金：国家自然科学基金(51663002);广西自然科学基金项目(2020GXNSFAA159113)。

摘　　要：通过熔融法制备热塑性木薯淀粉(TPS)/低密度聚乙烯(LDPE)/二氧化硅(SiO_(2))复合薄膜,研究不同表面性质SiO_(2)对复合材料的力学性能、塑化性能及结构变化规律。结果表明:添加疏水SiO_(2)后使TPS/LDPE/SiO_(2)复合材料的塑化扭矩降低、塑化时间增加;添加疏水SiO_(2)(TSP-L12)的TPS/LDPE/SiO_(2)复合材料的拉伸强度最高,添加亲水SiO_(2)(TSP-H10)时拉伸应变最高。疏水SiO_(2)能更好地发挥异相成核作用,形成较清晰的球晶,且不同表面性质的SiO_(2)会改变TPS/LDPE/SiO_(2)复合材料的晶型。添加亲水SiO_(2)时在基体界面粘接牢固,但容易发生团聚现象;疏水SiO_(2)在基体中分散较好,但容易发生剥落现象。Thermoplastic cassava starch(TPS)/low density polyethylene(LDPE)/silica(SiO_(2)) composite film was prepared by melting method.The mechanical and plasticizing properties,and structural change of the composites with different surface properties of silica were studied.The results shown that the plasticizing torque of TPS/LDPE/SiO_(2) decreased and the plasticizing time increased after adding hydrophobic SiO_(2).The tensile strength of TPS/LDPE/SiO_(2) with hydrophobic SiO_(2)(TSP-L12)was the highest,and the tensile strain of TPS/LDPE/SiO_(2) with hydrophilic SiO_(2)(TSP-H10)was the highest.Hydrophobic SiO_(2) can play the better role in heterogeneous nucleation and formed clear spherulites,and different surface properties of SiO_(2) will change the crystal form of TPS/LDPE/SiO_(2).When the hydrophilic SiO_(2) was added,it was easy to agglomerate at the interface of the matrix.when hydrophobic SiO_(2) was added,it could be well dispersed in the matrix,but it was easy to exfoliate.

关 键 词：热塑性木薯淀粉 亲水 疏水 二氧化硅 

分 类 号：TB332[一般工业技术—材料科学与工程]