Effect of silver contents in cellulose nanocrystal/silver nanohybrids on PHBV crystallization and property improvements

Heng Zhang; Hou-Yong Yu; Chuang Wang; Juming Yao

doi:10.1016/j.carbpol.2017.05.064

Effect of silver contents in cellulose nanocrystal/silver nanohybrids on PHBV crystallization and property improvements

Carbohydr Polym. 2017 Oct 1:173:7-16. doi: 10.1016/j.carbpol.2017.05.064. Epub 2017 May 25.

Authors

Heng Zhang¹, Hou-Yong Yu², Chuang Wang¹, Juming Yao¹

Affiliations

¹ The Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education and National Engineering Lab for Textile Fiber Materials & Processing Technology, College of Materials and Textile, Zhejiang Sci-Tech University, Hangzhou 310018, China.
² The Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education and National Engineering Lab for Textile Fiber Materials & Processing Technology, College of Materials and Textile, Zhejiang Sci-Tech University, Hangzhou 310018, China; State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China. Electronic address: phdyu@zstu.edu.cn.

PMID: 28732915
DOI: 10.1016/j.carbpol.2017.05.064

Abstract

Ternary nanocomposites including cellulose nanocrystals/silver nanohybrids (CNC-Ag) and biodegradable poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) were prepared by using solution casting. The effect of different AgNPs contents in the nanohybrids on crystallization ability and properties of PHBV was comprehensively investigated. Compared to binary PHBV/CNC nanocomposite, the ternary nanocomposites with high AgNPs contents showed larger improvements in the thermal stability, mechanical, barrier, overall migration and antibacterial properties. The property transitions at various AgNPs contents were due to transition of the nanohybrids induced PHBV crystallization ability (from single CNC nucleation to synergistic nucleation of CNC and AgNPs), and increased crystallinity without compromising the amounts of hydrogen bonds. Especially, the PHBV/CNC-Ag-1.7 showed the good barrier property and lower migration levels in food simulants, high antibacterial ratio of 99.9% and biocompatibility to human MG-63 cells, suggesting its potential application in food packaging related materials.

Keywords: AgNPs contents; CNC-Ag nanohybrid; Crystallization ability; PHBV; Property enhancement.