Strong water-resistant, UV-blocking cellulose/glucomannan/lignin composite films inspired by natural LCC bonds

Lisha Ma; Yelin Zhu; Yuefeng Huang; Lili Zhang; Zhiguo Wang

doi:10.1016/j.carbpol.2021.119083

Strong water-resistant, UV-blocking cellulose/glucomannan/lignin composite films inspired by natural LCC bonds

Carbohydr Polym. 2022 Apr 1:281:119083. doi: 10.1016/j.carbpol.2021.119083. Epub 2022 Jan 4.

Authors

Lisha Ma¹, Yelin Zhu², Yuefeng Huang², Lili Zhang³, Zhiguo Wang⁴

Affiliations

¹ Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China.. Electronic address: malisha@njfu.edu.cn.
² Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China.
³ Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China.. Electronic address: zhangll@njfu.edu.cn.
⁴ Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China.. Electronic address: wzg@njfu.edu.cn.

PMID: 35074132
DOI: 10.1016/j.carbpol.2021.119083

Abstract

Lignocellulose multi-component films were fabricated using cellulose nanofiber (CNF), konjac glucomannan (KGM), and alkali lignin (AL). Covalent bonds among these three lignocellulose components were constructed with epichlorohydrin (EPI) to achieve chemical cross-linking, which inspired by lignin-carbohydrate complex (LCC) bonds in natural wood. Chemical cross-linking enhanced the mechanical properties of the composite films, the tensile stress reached to 110.47 MPa and the tensile strain reached to 8.27%. The presence of hemicellulose and lignin in composite films contributed to the functionalities of the films. The composite film with 20 wt% AL blocked over 99% of both UVA and UVB, the water contact angle reached 110.38°, and no obvious swelling behavior was observed after soaking in water for 180 days. Composite films with strong water-resistance and UV-blocking have great potential for the related application.

Keywords: Chemical cross-linking; Composite film; Lignocellulose; Multi-component.

MeSH terms

Cellulose* / chemistry
Lignin* / chemistry
Mannans / chemistry
Water / chemistry

Substances

Mannans
Water
(1-6)-alpha-glucomannan
Cellulose
Lignin