Research Institute of Textile Chemistry and Textile Physics, University Innsbruck, Höchsterstrasse 73, A-6850 Dornbirn, Austria.
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Dec 15;243:118815. doi: 10.1016/j.saa.2020.118815. Epub 2020 Aug 11.
To convey novel properties to textile surface cotton-based fabrics were impregnated with solutions containing various chemical agents, such as butane-1,2,3,4-tetracarboxylic acid or hydrolyzed organotrialkoxysilanes (3-amino)propyltriethoxysilane), (3-glycidylpropyl)-trimethoxysilane, (3-triethoxysilylpropyl)succinic acid anhydride, octyltriethoxysilane, and Dynasylan F8815 (fluoroalkylfunctional water-borne oligosiloxane). The as-prepared cotton specimens were dried and cured at elevated temperatures. As the curing process can be performed at different temperatures, the impregnated and dried cotton samples were studied by means of time-dependent ATR-FTIR spectroscopy in an attempt to get a closer insight into the process mechanism. The results make evident that the butane-1,2,3,4-tetracarboxylic acid and (3-triethoxysilylpropyl)succinic acid anhydride reacts with the hydroxyl groups of the cellulose via a five-membered cyclic anhydride intermediate which is confirmed by vibration bands appearing at 1782 cm (symmetric stretching vibration of the anhydride carbonyl group) and at 1861 cm (antisymmetric stretching vibration of the anhydride carbonyl group).
为了赋予纺织品表面新的性能，棉织物被浸渍在含有各种化学试剂的溶液中，如丁烷-1,2,3,4-四羧酸或水解的有机三烷氧基硅烷（3-氨基）丙基三乙氧基硅烷、（3-缩水甘油丙基）-三甲氧基硅烷、（3-三乙氧基硅基丙基）琥珀酸酐、辛基三乙氧基硅烷和 Dynasylan F8815（氟烷基功能水性低聚硅氧烷）。制备好的棉样进行干燥和高温固化。由于固化过程可以在不同的温度下进行，因此通过时间相关的衰减全反射傅里叶变换红外光谱法（ATR-FTIR）对浸渍和干燥的棉样进行了研究，试图更深入地了解反应过程的机制。结果表明，丁烷-1,2,3,4-四羧酸和（3-三乙氧基硅基丙基）琥珀酸酐与纤维素的羟基通过五元环酐中间体反应，这一点通过出现在 1782cm（对称伸缩振动酐羰基）和 1861cm（反对称伸缩振动酐羰基）处的振动带得到证实。
