Facile Fluorine-free Finishing for Excellent Water Repellency of Cotton Fabric and Optimization Using Response Surface Methodology

ABSTRACT

Cotton fabrics are popular for their excellent properties, but their wider application is always limited due to their disadvantages including lack of water repellency and easy pollution. In this paper, based on improving environmental protection and the durability of water repellent, an organic-inorganic nano-hybrid cross-linked polysiloxane was prepared by chemical compounding method and emulsified to get water repellent. The water repellent finishing of cotton fabrics was carried out using the pad-dry-cure process, and the effect of finishing conditions on the water contact angle (WCA) of fabrics was investigated. Furthermore, the finishing process was optimized by the central composite design (CCD)-response surface method (RSM). The results show that the significant order of factors affecting the WCA of cotton fabric finished is successively finishing agent concentration > curing temperature > curing time. The established model has high prediction accuracy and the best finishing conditions are finishing concentration 89 g/L, curing temperature 162°C, curing time 130 s, response prediction value Y = 149.5°, which is very close to the experimental value of 149.7 ± 0.5°.

摘要

棉织物以其优异的性能而受到人们的青睐, 但由于其防水性差、易污染等缺点, 其广泛应用受到限制. 本论文从提高防水剂的环保性和耐久性出发, 采用化学复合法制备了一种有机-无机纳米杂化交联聚硅氧烷, 并对其进行乳化, 得到防水剂. 采用轧染干燥工艺对棉织物进行拒水整理, 研究整理条件对织物水接触角 (WCA) 的影响. 此外, 采用中心复合设计 (CCD)- 响应面法 (RSM) 优化了光整加工工艺. 结果表明, 影响棉织物整理后WCA的主要因素依次为整理剂浓度>硫化温度>硫化时间. 建立的模型预测精度较高, 最佳涂饰条件为涂饰浓度89g/L, 固化温度162℃, 固化时间130s, 响应预测值Y=149.5°, 与实验值149.7±0.5°非常接近.

KEYWORDS:

• Polysiloxane
• fluorine-free
• water repellent finishing
• response surface methodology
• cotton fabric

关键词:

• 聚硅氧烷
• 无氟
• 拒水整理
• 响应面法
• 棉织物

Highlights

1. A novel organic-inorganic nano-hybrid cross-linked polysiloxane was synthesized.

2. The fluorine-free water repellent finishing of cotton fabrics can be carried out only using the pad-dry-cure process.

3. The finished cotton fabrics have good water repellency.

4. The optimum finishing conditions were found by the CCD–RSM method.

5. The model and significance of influencing factors were determined.

Acknowledgments

The authors would like to thank the New Silk Knitted Garment Company and Dystar Trading Co. Ltd for the experimental knitted fabric and reactive dyes.

Disclosure statement

No potential conflict of interest was reported by the author(s).