文献类型：期刊文献

英文题名：Comprehensive Insight into Degradation Mechanism of Green Biopolyester Nanocomposites Using Functionalized Cellulose Nanocrystals

作者：Zhu, Jiaying[2];Chen, Yuxiang[2];Yu, Hou-Yong[1,2,3,5];Guan, Ying[2,4];Zhou, Ying[2];Yang, Xiaogang[2];Zou, Zhuan-Yong[3];Tam, Kam Chiu[5]

机构：[1]Donghua Univ, State Key Lab Modificat Chem Fibers & Polymer Mat, Coll Mat Sci & Engn, Shanghai 201620, Peoples R China;[2]Zhejiang Sci Tech Univ, Key Lab Adv Text Mat & Mfg Technol, Minist Educ, Coll Mat & Text, Hangzhou 310018, Zhejiang, Peoples R China;[3]Shaoxing Univ, Key Lab Clean Dyeing & Finishing Technol Zhejiang, Shaoxing 312000, Peoples R China;[4]Zhejiang A&F Univ, Zhejiang Prov Key Lab Chem Utilizat Forestry Biom, Hangzhou 311300, Zhejiang, Peoples R China;[5]Univ Waterloo, Waterloo Inst Nanotechnol, Dept Chem Engn, 200 Univ Ave West, Waterloo, ON, Canada

年份：2019

卷号：7

期号：18

起止页码：15537

外文期刊名：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000486565900043)、、EI(收录号：20193907479358)、Scopus(收录号：2-s2.0-85072650226)、WOS

基金：This work was supported by State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University (LK1713), Opening Project of Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province (Project Number: 1811), Zhejiang Province welfare technology applied research project (LGC19E030002), Candidates of Young and Middle Aged Academic Leader of Zhejiang Province, "521" Talent Project of Zhejiang Sci-Tech University, the Scientific Research Foundation of Zhejiang Sci-Tech University (ZSTU) under Grant. no. 19012099-Y, and the Young Elite Scientists Sponsorship Program by CAST (2018QNRC001). K.C.T. acknowledges research funding from CelluForce and FP Innovations.

语种：英文

外文关键词：Cellulose nanocrystals; PHBV; Nanocomposites; Thermal properties; In vitro degradation

外文摘要：Cellulose nanoparticles (CNPs) have been widely reported to improve the crystallization rate, mechanical and thermal properties, as well as degradation behavior of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV). Unfortunately, few studies have focused on the relationship between surface functional groups of CNPs and hydrogen bond interactions on the degradation rate and the mechanistic understanding of PHBV nanocomposites. To demonstrate degradation pathways, three types of CNPs with different amounts of surface hydroxyl groups were designed and then incorporated into PHBV to control the thermal stability, mechanical properties, and especially various degradation behavior by modulating the hydrogen bonding interactions with PHBV, achieving modulated degradation rate of nanocomposites. Furthermore, possible mechanisms describing the thermal, in vitro hydrolytic, and soil degradation of PHBV nanocomposites with various CNPs were proposed. In particular, PHBV nanocomposites reinforced by cellulose nanocrystal citrates with more hydroxyl groups exhibited better properties and degradation behavior than cellulose nanocrystal formates and cellulose nanocrystals. For the possible thermal degradation mechanisms, interfacial hydrogen bond interactions hindered the formation of the six-membered ester ring on PHBV, which improved the thermal stability of the nanocomposites during the degradation process. The rigid hydrogen-bonded networks between the highly crystalline CNPs and PHBV acted as barrier layers, protecting the ester groups on PHBV from being attacked by hydronium ion from the phosphate buffer saline solution. The microorganisms in the soil degrade and digest amorphous domains during the soil degradation process. With modulated degradation rates, high-performance and green nanocomposites could be suitable for biomedical and packaging materials.