Synergistic reinforcing effect of nano-montmorillonite and cellulose nanocrystals on poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)

文献类型： 外文期刊

第一作者： Xu, Xiaoqing

作者： Xu, Xiaoqing;Li, Yachao;Li, Jianing;Xu, Xiaoqing;Ma, Xiaojun

作者机构：

关键词： PHBH; Cellulose nanocrystals; Montmorillonite; Nanocomposites; Properties

期刊名称：CELLULOSE （ 影响因子：5.044； 五年影响因子：5.271 ）

ISSN： 0969-0239

年卷期： 2020 年 27 卷 11 期

页码：

收录情况： SCI

摘要： The montmorillonite/cellulose nanocrystal/poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) ternary nanocomposites were prepared by using 1 wt% CNCs and various amounts MMT. A synergistic enhancement was found between MMT, CNCs and PHBH. Intermolecular interactions occurred between O-H of MMT, O-H of CNCs and C=O of PHBH. Scanning electron microscopy (SEM) reveals that the compatibility of nanocomposites is the best with 3 wt% MMT content. It can be suggested that putting MMT into CNC-PHBH (CP) binary nanocomposites forms intercalation structures based on the XRD pattern. Thermogravimetric analysis shows that the thermal degradation temperature of nanocomposites is improved to 236.14 degrees C on dispersing 3 wt% MMT. Differential scanning calorimetry and polarizing optical microscopy suggest that MMT improves the crystallinity of nanocomposites, thus proving the good nucleation performance of MMT as a nucleating agent. Meanwhile, the mechanical properties of nanocomposites are also improved. The elastic modulus of nanocomposites improves by 53.5% compared with CP. With the addition of 5 wt% MMT, water vapor transmission rate and oxygen transmission rate reach 30.74 g/m(2) day and 34.82 cm(3)/m(2) day respectively, which satisfies the preservation conditions of meat packaging. Graphic abstract

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