Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (12): 118-124.doi: 10.13475/j.fzxb.20210704908

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Preparation and application of nano-SiO2/fluorine-containing silicon waterproof and moisture-permeable finishing agent

MEI Min, QIAN Jianhua(), ZHOU Yukai, YANG Jingjing   

  1. College of Textile Science and Engineering (International Silk College), Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
  • Received:2021-07-15 Revised:2022-09-25 Online:2022-12-15 Published:2023-01-06
  • Contact: QIAN Jianhua E-mail:qianjianhua@zstu.edu.cn

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Abstract:

In order to improve the waterproof and moisture-permeable properties of polyester fabrics, a semi-continuous seed emulsion polymerization method was adopted, where acrylate monomers were used as polymerized monomers, nano-SiO2, dodecafluoroheptyl methacrylate (G04) and vinyl trimethoxy using silane (A-171) as functional monomer. As a result, nano-SiO2/fluorine-containing silicon modified polyacrylate emulsion was prepared and applied to polyester fabric. The chemical structure of the modified copolymer emulsion was characterized and the application performance of the finished fabric was tested. The results show that all monomers participated in the emulsion polymerization reaction, and the thermal stability of the modified copolymer emulsion was greatly improved. The average particle size of the particles is 66 nm. After adding 2% of crosslinking agent to the finishing agent, the hydrostatic pressure and washing resistance of the finished fabric were significantly improved compared with the unfinished polyester fabric, with the contact angle becoming 138°. The water-repellent performance of the finished fabric was significantly improved, the moisture permeability of the finished fabric was also increased, and the warp breaking strength was increased from 315.6 N to 493.4 N.

Key words: nano-SiO2, emulsion polymerization, waterproof and moisture permeable, finishing agent, polyester fabric, function treatment

CLC Number: 

  • TS195.2

Fig.1

Infrared spectra of nano-SiO2 before and after modification"

Fig.2

Infrared spectrum of modified copolymerization emulsion"

Fig.3

Particle size distribution of modified copolymer emulsion"

Fig.4

Effects of HEMA mass fraction on contact angle and moisture permeability of polyester fabrics"

Fig.5

Effects of emulsifie mass fraction on contact angle and moisture permeability of polyester fabrics"

Fig.6

Effects of organic fluorine mass fraction on contact angle and warp breaking strength of polyester fabrics"

Tab.1

Effect of crosslinking agent mass fraction on hydrostatic pressure of polyester fabric%"

交联剂质量
分数/%		 静水压/kPa
未水洗 水洗5次 水洗10次 水洗15次
1 2.146 1.839 1.249 1.088
2 2.251 2.009 1.566 1.238
3 2.326 2.158 1.740 1.380

Fig.7

XPS full spectrum of polyester fabric after finishing"

Tab.2

Contents of various elements on surface of polyester fabrics after finishing%"

项目 C1s O1s F1s Si2p
理论值 63.54 18.84 14.33 3.29
实验值 63.03 17.23 15.39 4.35

Fig.8

TG curve of polyester fabric after finishing"

Fig.9

SEM images of polyester fabric before and after finishing(×2 000). (a) Polyester raw fabric sample;(b)Polyester emulsion finished polyester fabric;(c) Polyester fabric finished with modified copolymer emulsion"

Fig.10

Contact angle of polyester fabrics before and after finishing. (a)Unorganized;(b) Modified copolymer emulsion finishing"

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