Abstract
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 °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/m2 day and 34.82 cm3/m2 day respectively, which satisfies the preservation conditions of meat packaging.
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Acknowledgments
This research has been financially supported by Opening Project Fund of Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture and Rural Affairs, P. R. China/State Key Laboratory Breeding Base of Cultivation & Physiology for Tropical Crops/Danzhou Investigation & Experiment Station of Tropical Crops, Ministry of Agriculture and Rural Affairs, P. R. China (RRI-KLOF202001), and Natural Science Foundation of Tianjin city (18JCYBJC90100).
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Xu, X., Li, Y., Ma, X. et al. Synergistic reinforcing effect of nano-montmorillonite and cellulose nanocrystals on poly(3-hydroxybutyrate-co-3-hydroxyhexanoate). Cellulose 27, 6249–6261 (2020). https://doi.org/10.1007/s10570-020-03252-0
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DOI: https://doi.org/10.1007/s10570-020-03252-0