Improvement of Interfacial Adhesion between Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) and Silica Particles
Improvement of Interfacial Adhesion between Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) and Silica Particles
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DOI：
10.1021/acs.iecr.0c02284
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发表时间：
2020-07
影响因子：
4.2
通讯作者：
Toshiki Tamiya;Yu-I. Hsu;T. Asoh;H. Uyama
中科院分区：
文献类型：
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作者：
Toshiki Tamiya;Yu-I. Hsu;T. Asoh;H. Uyama
为了改善生物可降解生物塑料聚（3-羟基丁酸酯-co-3-羟基己酸酯）（PHBH）的机械性能，将由二氧化硅颗粒（SiO2）组成的填料与PHBH混合;然而，SiO2显示出与PHBH的低相容性。为了提高SiO2与PHBH的界面结合力，以炔丙基封端的PHBH和叠氮改性SiO2为原料，通过点击化学法制备了PHBH接枝SiO2（SiO2-PHBH）填料。扫描电子显微镜显示SiO2-PHBH填料均匀分散在PHBH中。相比之下，SiO2填料在PHBH中聚集。PHBH/SiO2-PHBH复合膜的热分析表明，复合膜的玻璃化转变温度向高温方向移动。PHBH/SiO2-PHBH复合膜的杨氏模量和屈服应力随着SiO2-PHBH浓度的增加而增加。相反，PHBH/SiO2复合薄膜的弹性模量只有小幅增加，屈服应力下降。这些结果证实了SiO2-PHBH改善了PHBH的力学性能，有望扩大PHBH的工业应用。
To improve the mechanical properties of biodegradable bioplastic poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH), a filler made up of silica particles (SiO2) is mixed with PHBH; however, SiO2 shows low compatibility with PHBH. Herein, to enhance the interfacial adhesion of SiO2 and PHBH, the PHBH-grafted SiO2 (SiO2–PHBH) fillers were prepared from propargyl-terminated PHBH and azide-modified SiO2 by click chemistry. Scanning electron microscopy revealed that SiO2–PHBH fillers dispersed uniformly in PHBH. In contrast, the SiO2 fillers aggregated in PHBH. Thermal analysis of the PHBH/SiO2–PHBH composite films revealed that the glass transition temperature shifted to a high temperature. Young’s modulus and yield stress of the PHBH/SiO2–PHBH composite films were increased with increasing concentration of SiO2–PHBH. Conversely, PHBH/SiO2 composite films showed only a small increase in the elastic modulus and a decrease in the yield stress. These results confirmed that SiO2–PHBH improves the mechanical properties of PHBH, and it is expected to expand the industrial applications of PHBH.