Synthesis of Castor Oil-based Cationic Waterborne Polyurethane Emulsion and Its Application
- PDF / 1,040,579 Bytes
- 9 Pages / 595.276 x 841.89 pts (A4) Page_size
- 115 Downloads / 230 Views
832 DOI
https: //doi. org/10.1007/s11595-020-2327-0
Synthesis of Castor Oil-based Cationic Waterborne Polyurethane Emulsion and Its Application LÜ Zhi, YI Ying*, ZHANG Chen, LÜ Kai, FENG Hao, ZHANG Yanfei
(School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China)
Abstract: Castor oil-based cationic waterborne polyurethane (CWPU) was synthesized by pre-polymer process using castor oil (CO), poly(adipic acid-1,4-succinate diol) (PBA), isophorone diisocyanate (IPDI), and N-methyldiethanolamine (MDEA). The influences of the content of CO and MDEA on comprehensive performance and finished fabric properties of cationic waterborne polyurethane was investigated, especially the antibacterial properties of finished fabric. The CWPU latex particle size and its distribution decrease as the content of CO increased from 0wt% to 16.8wt%, and increases afterwards. The CWPU films show much higher thermal stability than cationic waterborne polyurethane without CO. The surface of fabrics was characterized by scanning electron microscope (SEM). The finished fabric surface is much smoother. In addition, the finished fabric with CWPU emulsion has better antibacterial property against E. coli and S. aureus. When MDEA content is 8%, the antibacterial rates of the two kinds of bacteria are 77.3% and 82.2%, respectively. Key words: cationic waterborne polyurethane; castor oil; fabric finishing; antibacterial
1 Introduction Polyurethanes (PUs) are considered as one of the most versatile polymer classes, and used widely throughout industry in foams, coatings, adhesives, and cast elastomers[1-3]. As technology advances, PUs can be synthesized and dispersed in water as ionomers with no or little solvent used[4,5]. PUs that can be dispersed in water are called waterborne polyurethanes dispersions (PUDs). With the enactment of environmental legislation and the promotion of people’s consumption concept, waterborne PUDs have received more and more attention because they are non-toxic, eco-friendly, producing less volatile organic compounds (VOCs) during their curing process compared to solvent-based PU production methods and can be modified easily[6]. Waterborne PUDs mainly include anionic waterborne PUs and cationic waterborne PUs dispersions. Currently, anionic waterborne PUs are more prevalent, both in industry and in the literature, than cationic waterborne PUs[1]. Structurally, the hydrophilic chain extenders for © Wuhan University of Technology and Springer-Verlag GmbH Germany, Part of Springer Nature 2020 (Received: Nov. 28, 2019; Accepted: Jan. 21, 2020) LÜ Zhi(吕志): E-mail: [email protected] *Corresponding author: YI Ying(易英): Prof.; E-mail: yying630 @whut.edu.cn
anionic and cationic waterborne PUDs are dimethylolpropionic acid (DMPA)[7] and N-methyldiethanolamine (MDEA) [8], respectively. Compared with cationic waterborne PUDs, a key disadvantage of anionic waterborne PUDs is their lack of antimicrobial activity[9]. According to the published literature, cationic waterborne PUDs e
Data Loading...
