Preparation and Properties of Waterborne Polyurethane/Polyacrylate Self-Healing Materials Based on Disulfide Bond

被引：0

作者：

Feng J. ^{[1
]}

Wang Y. ^{[1
]}

Wang X. ^{[1
]}

机构：

[1] College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi'an

来源：

Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2021年 / 37卷 / 08期

关键词：

Disulfide bond; Polyacrylate; Self-healing; Waterborne polyurethane;

D O I：

10.16865/j.cnki.1000-7555.2021.0220

中图分类号：

学科分类号：

摘要：

Aqueous polyurethane containing disulfide bond (WPUS) was prepared by using PTMEG and IPDI as monomer, DMPA, BDO and HEDS as chain extender. A series of self-healing waterborne polyurethane/polyacrylate (AWPUS) composites with different proportions were prepared with polyacrylate (PA) emulsion by physical blending. FT-IR, Raman spectroscopy, particle size distribution, UV-vis, XRD, TGA, mechanics, SEM and polarizing microscope were used to analyze the microstructure, composition, thermal stability and self-healing performance of the composites. The effects of PA/WPUS ratio on the self-healing performance of the films were also investigated. The results show that the introduction of PA can significantly improve the self-healing efficiency of the materials. At 60 ℃, the repair efficiency is increased from 73.4% in 6 h to 81.7% in 2 h. When the PA/WPUS mass ratio is 3/7, the tensile strength and strain are 16.8 MPa and 704%, respectively; after 5 loading-unloading cycles, the stress recovery rate reaches 84.3%, showing good thermal stability, reprocessability and excellent comprehensive performance. © 2021, Editorial Board of Polymer Materials Science & Engineering. All right reserved.

引用

页码：83 / 92

页数：9

共 12 条

[1]

Bao B W, Fan J, Wang W, Et al., Photochromic cotton fabric prepared by spiropyran-ternimated water polyurethane coating, Fibers and Polymers, 21, pp. 733-742, (2020)

[2]

Li J, Hu Y R, Qiu H X, Et al., Coaxial electrospun fibres with graphene oxide/pan shells for self-healing waterborne polyurethane coatings, Progress in Organic Coatings, 131, pp. 227-231, (2019)

[3]

Wang X P, Cheng B K, Liang D, Et al., Progress of intrinsic self-healing polymer materials, Polymer Materials Science & Engineering, 35, 6, pp. 183-190, (2019)

[4]

Fan W H, Jin Y, Shi L J, Et al., Developing visible-light-induced dynamic aromatic schiff base bonds for room-temperature self-healable and reprocessable waterborne polyurethanes with high mechanical properties, Journal of Materials Chemistry A, 8, pp. 6757-6767, (2020)

[5]

Han Y T, Jiang Y Z, Hu J L., Collagen incorporation into waterborne polyurethane improves breathability, mechanical property, and self-healing ability, Composites Part A: Applied Science and Manufacturing, 133, (2020)

[6]

Zhang M Y, Zhao F Q, Xin W, Et al., Room-temperature self-healing and reprocessable waterborne polyurethane with dynamically exchangeable disulfide bonds, Chemistry Select, 5, pp. 4608-4618, (2020)

[7]

Lai Y, Kuang X, Zhu P, Et al., Colorless, transparent, robust, and fast scratch-self-healing elastomers via a phase-locked dynamic bonds design, Advanced Materials, 30, (2018)

[8]

Zhang J, Tu W P, Xia Z B., Modified method of acrylic resin for leather filling agent, China Leather, 33, 1, pp. 10-14, (2004)

[9]

Zhang C Y, Zhang X Y, Dai J B, Et al., Synthesis and properties of pdms modified waterborne polyurethane-acrylic hybrid emulsion by solvent-free method, Progress in Organic Coatings, 63, pp. 238-244, (2008)

[10]

Wan T, Chen D J., Synthesis and properties of self-healing waterborne polyurethanes containing disulfide bonds in the main chain, Journal of Materials Science, 52, pp. 197-207, (2017)

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