Hu Hanchang, Dong Xia, Zhao Qiangqiang, Wu Rongliang, Meng Chen, Xu Jiani, Cai Tingwei, Wang Xin, He Jinxin
College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, PR China.
National Engineering Research Center for Dyeing and Finishing of Textiles, Donghua University, Shanghai 201620, PR China.
ACS Omega. 2022 Aug 22;7(34):30093-30103. doi: 10.1021/acsomega.2c03131. eCollection 2022 Aug 30.
As a most promising formaldehyde-free crosslinking agent for the antiwrinkle treatment of cotton fabrics, 1,2,3,4-butanetetracarboxylic acid (BTCA) has been explored for many years to replace the traditional -methylol resin. However, the current methodology for preparing antiwrinkle cotton fabrics with BTCA mainly highlights the troublesome problem of higher curing temperature. In this research, a novel strategy with the aid of dimethyl sulfone (MSM) was developed to decrease the curing temperature of BTCA for fabricating antiwrinkle cotton fabrics, which is an eco-friendly additive with low price and wonderful biocompatibility. Temperature-dependent Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, and computational simulations were employed to analyze the mechanism of MSM in the overall reaction between BTCA and cellulose. Based on the strong hydrogen-bond acceptor property of MSM, the noncovalent interactions in the crosslinking system could be easily interrupted, which facilitates the BTCA diffusion in amorphous regions of cellulose, anhydride formation, and the thermal vibration of cellulose chains during the processing. Physically and chemically speaking, both reactivities of grafting and crosslinking reactions of BTCA are significantly increased with the assistance of MSM, consequently reducing the curing temperature, which will hopefully help achieve the industrial-scale application of BTCA in antiwrinkle treatment.
作为一种用于棉织物抗皱处理的最具潜力的无甲醛交联剂，1,2,3,4-丁烷四羧酸（BTCA）已被研究多年，以取代传统的羟甲基树脂。然而，目前用BTCA制备抗皱棉织物的方法主要突出了固化温度较高这一棘手问题。在本研究中，开发了一种借助二甲基砜（MSM）的新策略来降低BTCA用于制造抗皱棉织物时的固化温度，MSM是一种价格低廉且具有出色生物相容性的环保添加剂。采用温度依赖的傅里叶变换红外光谱、X射线光电子能谱和计算模拟来分析MSM在BTCA与纤维素的整体反应中的作用机制。基于MSM强大的氢键受体性质，交联体系中的非共价相互作用能够轻易被打断，这有利于BTCA在纤维素无定形区域的扩散、酸酐的形成以及加工过程中纤维素链的热振动。从物理和化学角度来看，在MSM的辅助下，BTCA的接枝和交联反应活性均显著提高，从而降低了固化温度，有望有助于实现BTCA在抗皱处理中的工业化规模应用。
