填料/基体三维氢键网络提升PHBV复合材料力学性能  

Three dimensional hydrogen bonding network of filler/matrix improves mechanical properties of PHBV composites

作　　者：赵宝艳[1] 陈丽娜 张利[2] 包锦标 ZHAO Bao-yan;CHEN Li-na;ZHANG Li;BAO Jin-biao(Zhejiang Fashion Institute of Technology,Ningbo 315211,China;Ningbo University,Ningbo 315211,China)

机构地区：[1]浙江纺织服装职业技术学院,宁波315211 [2]宁波大学,宁波315211

出　　处：《复合材料科学与工程》2022年第6期53-58,共6页Composites Science and Engineering

基　　金：宁波市自然科学基金(2021J191,202003N4104);2020年度浙江省高等学校国内访问工程师项目(FG2020156)。

摘　　要：通过熔融共混方法,构建生物质填料三维氢键网络增强甲壳素、单宁酸与PHBV之间填料-基体的相互作用,实现了甲壳素-单宁酸/PHBV复合材料的弯曲性能和冲击性能的大幅提升。采用红外光谱对PHBV基体加入甲壳素和单宁酸前后的特征峰变化进行研究,探讨三维氢键网络的形成,验证氢键是否成功作用于基体与填料之间。力学性能测试结果表明PHBV复合材料拥有优异的弯曲性能和冲击性能,在引入三维氢键网络后,其弯曲模量提高到了833 MPa,约为纯样的1.79倍;弯曲强度从28.7 MPa提高到了42.5 MPa,提升了48%;冲击强度达到了2851 J/m^(2),较纯样提升了68.3%。使用SEM观察其弯曲断面的微观结构以及填料的分散状况,结果表明甲壳素与单宁酸和聚合物基体混合较为均匀,共混物两相界面作用得到进一步增强。采用WAXD和DSC观察其结晶性能,结果表明其三维氢键网络在一定程度上破坏了大分子链的规整性,限制了分子链的运动,导致其结晶度一定程度下降。Through the melt blending method,the three-dimensional hydrogen bonding network of biomass filler was constructed to enhance the filler matrix interaction among chitin,tannic acid and PHBV,and the bending and impact properties of chitin-tannic acid/PHBV composites were greatly improved.The changes of characteristic peaks of PHBV matrix before and after adding chitin and tannic acid were studied by infrared spectroscopy,the formation of three-dimensional hydrogen bonding network was discussed,and whether the hydrogen bonding successfully interacted between matrix and filler was verified.The test results of mechanical properties show that PHBV composites have excellent bending and impact properties.After introducing three-dimensional hydrogen bonding network,its bending modulus increases to 833 MPa,which is about 1.79 times of the pure sample.The bending strength increases from 28.7 MPa to 42.5 MPa,which is increased by 48%.The impact strength reaches 2851 J/m2,which is 68.3%higher than that of the pure sample.SEM was used to observe the microstructure of the bending section and the dispersion of fillers.The results show that chitin,tannic acid and polymer matrix were well mixed,and the interfacial interaction between the two phases was further enhanced.WAXD and DSC were used to investigate the crystallinity.The results show that the three-dimensional hydrogen bonding network destroyed the regularity of macromolecular chain to a certain extent,restricted the movement of molecular chain,and led to the decrease of crystallinity to a certain extent.

关 键 词：PHBV 氢键网络 可生物降解 力学性能 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]