A facile strategy to fabricate high-barrier, water- and oil-repellent paper with carboxymethyl cellulose/collagen fiber/modified polyvinyl alcohol

Ruifeng Zhu; Wenzhi Lv; Chang Sun; Chengrong Qin; Dan Zhang; Zhu Long

doi:10.1016/j.carbpol.2023.120933

A facile strategy to fabricate high-barrier, water- and oil-repellent paper with carboxymethyl cellulose/collagen fiber/modified polyvinyl alcohol

Carbohydr Polym. 2023 Aug 15:314:120933. doi: 10.1016/j.carbpol.2023.120933. Epub 2023 Apr 20.

Authors

Ruifeng Zhu¹, Wenzhi Lv², Chang Sun³, Chengrong Qin⁴, Dan Zhang¹, Zhu Long⁵

Affiliations

¹ Laboratory of Papermaking, College of Textile Science and Engineering, Jiangnan University, Wuxi 214122, China.
² College of Chemistry and Chemical Engineering of Qiannan Normal University for Nationalities, Tuyun 558000, China.
³ Laboratory of Papermaking, College of Textile Science and Engineering, Jiangnan University, Wuxi 214122, China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China.
⁴ Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China.
⁵ Laboratory of Papermaking, College of Textile Science and Engineering, Jiangnan University, Wuxi 214122, China. Electronic address: longzhu@jiangnan.edu.cn.

PMID: 37173031
DOI: 10.1016/j.carbpol.2023.120933

Abstract

Due to the increasingly serious environmental and human health hazards brought by traditional food packaging materials, paper-based packaging materials have become increasingly popular among consumers in recent years. Currently, the fabrication of fluorine-free degradable water- and oil-repellent paper using low-cost bio-based polymers by a simple method is a hot subject in the field of food packaging. In this work, we used carboxymethyl cellulose (CMC), collagen fiber (CF), and modified polyvinyl alcohol (MPVA) to create coatings that were impervious to water and oil. The homogeneous mixture of CMC and CF generated electrostatic adsorption to impart excellent oil repellency to the paper. PVA was chemically modified by sodium tetraborate decahydrate, and the MPVA coating imparted excellent water-repellent properties to the paper. Finally, the water- and oil-proof paper showed excellent water repellency (Cobb value: 1.12 g/m²), oil repellency (kit rating: 12/12), low air permeability (0.3 μm/Pa·s), and stronger mechanical properties (4.19 kN/m). This non-fluorinated degradable water- and oil-repellent paper with high barrier properties prepared by a convenient method is expected to be in widespread use in the food packaging field.

Keywords: Coated paper; Degradation; Food packaging; Water- and oil-repellent.