Synthesis and properties of reed-based polyurethane (PU) coating

Ruiying Wu; Meng Chen; Wenjing Zhang; Wenqing Yang; Libin Bai; Li Huo

doi:10.1515/polyeng-2024-0109

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Article

Synthesis and properties of reed-based polyurethane (PU) coating

Ruiying Wu , Meng Chen , Wenjing Zhang , Wenqing Yang , Libin Bai and Li Huo

Published/Copyright: September 2, 2024

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From the journal Journal of Polymer Engineering Volume 44 Issue 9

Abstract

The reuse of agricultural waste and the development of bio-based materials are the main strategies for solving the global energy crisis and environmental problems. Agricultural waste reeds containing natural nano-silica (SiO₂) were liquefied with PEG-400, Castor oil, and acid to produce reed-based polyols (R–P). The result shows that the liquefied product is a polyol with a hydroxyl value of 171 mgKOH/g, a viscosity of 1.221 Pa S, the number average molecular weight (Mn) of 1.202 kg/mol. Then reed-based two-component polyurethane emulsion (R-T-PU) and reed-based one-component waterborne polyurethane emulsion (R-O-WPU) with good glossiness and excellent mechanical properties were prepared. Because of the natural nano-SiO₂ in reed and castor oil, the coatings exhibit excellent mechanical properties and hydrophobicity. The results show that the series of reed-based polyurethane has excellent mechanical properties, a maximum hardness of 6H, good hydrophobic effect, a maximum contact angle of 109°, high thermal stability, and a maximum initial decomposition temperature can reach 299.1 °C. Therefore, the environmental protection bio-based polyurethane coating with excellent properties can be prepared with the reed, which is expected to replace fossil resources. It provides an experimental basis for the high-added-value utilization of reed.

Keywords: reed; polyurethane; biomass liquefaction; coating

Corresponding authors: Libin Bai and Li Huo, College of Chemistry & Materials Science, Hebei Provincial Key Laboratory of Analytical Science and Technology, Chemical Biology Key Laboratory of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Institute of Life Science and Green Development, Hebei University, Baoding 071002, P. R.China, E-mail: zhonggou556@163.com (L. Bai), huoli@hbu.edu.cn (L. Huo).

Funding source: Hebei Provincial Key Laboratory of Analytical Science and Technology

Award Identifier / Grant number: 22567620H

Funding source: The multidisciplinary research project of Hebei University

Award Identifier / Grant number: DXK202003

Funding source: Higher Education Science and Technology Research Project of Hebei Province, China

Award Identifier / Grant number: ZD2019022

Funding source: Science and technology projects of Baoding

Award Identifier / Grant number: 1911Q002

Research ethics: Not applicable.
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Competing interests: The authors declare no conflicts of interest regarding this article.
Research funding: We thank the following funders for financial support: Hebei Provincial Key Laboratory of Analytical Science and Technology (22567620H); the Higher Education Science and Technology Research Project of Hebei Province, China (ZD2019022); Hebei Provincial Key Laboratory of Analytical Science and Technology (22567620H); Science and technology projects of Baoding (1911Q002); The multidisciplinary research project of Hebei University (DXK202003).
Data availability: The raw data can be obtained on request from the corresponding authors.

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Received: 2024-05-29

Accepted: 2024-08-04

Published Online: 2024-09-02

Published in Print: 2024-10-28

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https://doi.org/10.1515/polyeng-2024-0109

Keywords for this article

reed; polyurethane; biomass liquefaction; coating