Rice straw cellulose microfiber reinforcing PVA composite film of ultraviolet blocking through pre-cross-linking

Zhaoxue Feng; Dan Xu; Zhubao Shao; Ping Zhu; Jianhui Qiu; Longxiang Zhu

doi:10.1016/j.carbpol.2022.119886

Rice straw cellulose microfiber reinforcing PVA composite film of ultraviolet blocking through pre-cross-linking

Carbohydr Polym. 2022 Nov 15:296:119886. doi: 10.1016/j.carbpol.2022.119886. Epub 2022 Jul 21.

Authors

Zhaoxue Feng¹, Dan Xu¹, Zhubao Shao², Ping Zhu¹, Jianhui Qiu³, Longxiang Zhu⁴

Affiliations

¹ Institute of Functional Textiles and Advanced Materials, College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-textiles, Qingdao University, Qingdao 266071, China.
² Institute of Functional Textiles and Advanced Materials, College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-textiles, Qingdao University, Qingdao 266071, China. Electronic address: zhu871227@163.com.
³ Department of Machine Intelligence and Systems Engineering Faculty of Systems Engineering, Akita Prefectural University, Akita 015-0055, Japan; Qingdao Arc Polymer High-Tech Co., Ltd, Qingdao 266000, China.
⁴ Institute of Functional Textiles and Advanced Materials, College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-textiles, Qingdao University, Qingdao 266071, China; National forestry and Grassland Administration Key Laboratory of Plant Fiber Functional Materials, Fuzhou, Fujian 350108, China. Electronic address: lxzhu@qdu.edu.cn.

PMID: 36087964
DOI: 10.1016/j.carbpol.2022.119886

Abstract

Rice straw cellulose microfiber (CMF) was obtained through the gentle low-temperature phase transition method. Then, NaIO₄ was utilized to modify CMF by selective oxidation to prepare aldehyde CMF (a-CMF) to improve the reactivity of the CMF. Finally, the a-CMF reinforced polyvinyl alcohol (PVA) composite films were prepared through a pre-cross-linking and solvent casting approach. The cross-linking network formed by a-CMF and PVA through the aldolization reaction significantly improved the mechanical properties of the a-CMF/PVA composite film. The tensile strength of a-CMF-2/PVA was 37.54 ± 0.77 MPa, which was higher than 25.88 ± 2.97 MPa of the pure PVA. SEM results showed that the fracture surface of the a-CMF/PVA composite film with the cross-linking network was smooth. In addition, prepared a-CMF-2/PVA composite films had a transmittance of over 80 % in the visible light range, and also possessed excellent UV blocking property.

Keywords: Composite film; Cross-linking; Mechanical property; Rice straw; UV blocking.

MeSH terms

Cellulose
Oryza*
Polyvinyl Alcohol*
Tensile Strength

Substances

Polyvinyl Alcohol
Cellulose