Issue 54, 2019
From the journal:

RSC Advances

Novel waterborne polyurethanes containing long-chain alkanes: their synthesis and application to water repellency

Xiaoli Liu, ORCID logo a   Xiaobin Zou,a   Zhen Ge,*a   Wenguo Zhanga  and  Yunjun Luo ORCID logo *a  

* Corresponding authors

a School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, China
E-mail: gzandlsy@bit.edu.cn, yjluo@bit.edu.cn
Fax: +86-010-68911608
Tel: +86-010-68911608

Abstract

In the fabric finishing field, the water repellents have received increasing interest in recent years and the development of a fluorine-free water repellent has become an attractive prospect. In this study, glyceryl monostearate-modified waterborne polyurethanes (GWPUs) with a branched structure act as water repellents, and were prepared from toluene diisocyanate, trimethylolpropane, hydroxypropyl polydimethylsiloxane, N-methyldiethanolamine, and glyceryl monostearate (GMS). The water repellency and other properties of GWPUs with different GMS content, such as water resistance, hydrophobicity, and air permeability, were studied. The results show that the GMS content for optimum water repellency was 20 wt%, which achieved the highest score (100 points) in a water repellency evaluation. As for the water repellent ability with a GMS content of 20 wt%, the water absorption of a piece of film was reduced to 7.80%, while the water contact angle of terylene coated by the water repellent rose to 148.0°.

Graphical abstract: Novel waterborne polyurethanes containing long-chain alkanes: their synthesis and application to water repellency

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Article information

DOI
https://doi.org/10.1039/C9RA06462A
Article type
Paper
Submitted
18 Aug 2019
Accepted
18 Sep 2019
First published
02 Oct 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 31357-31369

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Novel waterborne polyurethanes containing long-chain alkanes: their synthesis and application to water repellency

X. Liu, X. Zou, Z. Ge, W. Zhang and Y. Luo, RSC Adv., 2019, 9, 31357 DOI: 10.1039/C9RA06462A

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