环保型羧甲基纤维素/聚（3-羟基丁酸-co-3-羟基戊酸）生物复合材料的界面结构与性能。
Interfacial structure and property of eco-friendly carboxymethyl cellulose/poly(3-hydroxybutyrate-co-3-hydroxyvalerate) biocomposites.
机构信息
Department of Civil and Environmental Engineering, Brunel University London, Uxbridge UB8 3PH, UK.
Department of Civil and Environmental Engineering, Brunel University London, Uxbridge UB8 3PH, UK.
出版信息
Int J Biol Macromol. 2021 May 15;179:550-556. doi: 10.1016/j.ijbiomac.2021.03.009. Epub 2021 Mar 3.
This paper investigates the interface bonding of the novel carboxymethyl cellulose (CMC)/poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) biocomposites, and the influence of coupling agents on the structure and properties of the biocomposites. The chemical structure, crystallisation behaviour and microstructure of the untreated and coupling agent treated biocomposites were examined by using FTIR, XRD and SEM respectively. The results suggested that maleic anhydride (MA) and vinyltrimethoxysilane (VTMS) covalently bonded to both CMC and PHBV macromolecules owing to their intrinsic multifunctionality, and promoted the distribution and embedment of the CMC in PHBV matrix, leading to a superior interfacial bonding of the resulted biocomposites. The enhanced interfacial bonding between the CMC and PHBV gave rise to a significant increase of tensile and flexural properties (i.e. tensile and flexural stress increased by up to 71% and 117% respectively, Young's and flexural modulus increased by up to 17% and 18% respectively) as well as thermal stability of the biocomposites.
本文研究了新型羧甲基纤维素（CMC）/聚（3-羟基丁酸-co-3-羟基戊酸）（PHBV）生物复合材料的界面结合情况，以及偶联剂对生物复合材料结构和性能的影响。采用傅里叶变换红外光谱（FTIR）、X 射线衍射（XRD）和扫描电子显微镜（SEM）分别研究了未处理和偶联剂处理的生物复合材料的化学结构、结晶行为和微观结构。结果表明，马来酸酐（MA）和乙烯基三甲氧基硅烷（VTMS）由于其固有多功能性而与 CMC 和 PHBV 大分子共价结合，并促进了 CMC 在 PHBV 基体中的分布和嵌入，从而使得到的生物复合材料具有优异的界面结合性能。CMC 和 PHBV 之间增强的界面结合导致拉伸和弯曲性能（即拉伸和弯曲应力分别增加高达 71%和 117%，杨氏模量和弯曲模量分别增加高达 17%和 18%）以及生物复合材料的热稳定性显著提高。
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