Effects of starch–citric acid cross-linking on the fibrous composites using waste paper pulp material for eco-friendly packaging

Pontree Itkor, Ajit Kumar Singh, Myungho Lee, Athip Boonsiriwit, Youn Suk Lee

Research output: Contribution to journalArticlepeer-review

Abstract

Waste paper pulp (WP) is considered an eco-friendly alternative to petrochemical plastic. However, certain properties of WP limit its application in packaging. Starch–acid cross-linking reportedly improves the physical and barrier properties of cellulose-based materials. Therefore, this study aims to investigate the effect of starch–citric acid (CA) cross-linking on the physical and barrier properties of WP. Herein, WP/starch–CA-cross-linked composite sheets (WPSAs) were fabricated, and their physical, barrier, and thermal properties and morphology were investigated. The results indicated that introducing CA into WP/starch (WPS) reduced water absorption up to 39.5% compared to that of the control. Additionally, the surface and cross-section morphology, tensile strength, contact angle, and thermal properties improved as the concentration of CA increased. The highest tensile strength was obtained for WPSA with 5% of CA, providing 1445% and 26% values higher than that of the control and WPS, respectively. Moreover, the contact angle of this WPSA was superior at 116.83°. The thermal stability was also improved by increasing the glass transition temperature and decreasing the weight loss and decomposition rate. Furthermore, the addition of CA into WPS increased the system R-values up to 38% compared to that of the control, indicating improvement in the thermal-insulation property. However, introducing more than 5% of CA negatively affected the morphology, tensile strength, and contact angle. Thus, adding 5% of CA improves the physical and barrier properties of WPSA, which can be utilised for biodegradable packaging. Graphical abstract: [Figure not available: see fulltext.]

Original languageEnglish
JournalBiomass Conversion and Biorefinery
DOIs
Publication statusAccepted/In press - 2022

Bibliographical note

Funding Information:
This work is supported by the Technological Innovation R&D Program (S3106241) funded by the Ministry of SMEs and Startups (MSS, Korea).

Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment

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