Effects of Surface-Modified Nanocellulose on Hygrothermal Aging Behavior of PLA/PBS Blends

doi:10.19491/j.issn.1001-9278.2019.12.004

Abstract

Abstract: Nanocellulose (CNF)was surface-modified by a silane coupling agent, KH550, and then a poly(butylene succinate)(PBS)/modified CNF masterbatch was prepared by melt blending with a twin-screw extruder. A series of poly(lactic acid)(PLA)/PBS/CNF blends were prepared by melt compounding with the obtained masterbatch, and their hygrothermal aging performance was characterized in a damp heat aging test chamber. The crystallization and mechanical properties of the blends were investigated by SEM, WAXD, DSC, polarizing microscope and universal testing machine. The results indicated that CNF could act as a nucleating agent to improve the crystallinity of PLA. The compatibility between the PLA matrix and PBS/CNF masterbatch was improved greatly due to the surface modification. The blends achieved an increase in degree of crystallinity by 28.15 %, in tensile strength by 5.54 % and in elongation at break by 8.23 % after aging for 36 h.

ZHU Yan, ZHANG Qifeng, JIA Shikui, ZHAO Zhongguo, CHEN Ligui, CAO Le. Effects of Surface-Modified Nanocellulose on Hygrothermal Aging Behavior of PLA/PBS Blends[J]. China Plastics, 2019, 33(12): 16-22.

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