Effect of Silane Coupling Agents on Cotton Fibre Finishing

ABSTRACT

Five different silane coupling agents such as vinyltrimethoxysilane (VTMS), vinyltriethoxysilane (VTES), trimethoxysilylpropylmethacrylate (TSPM), glycidoxypropyltriethoxysilane (GPTES) and aminopropyltriethoxysilane (APTES) were used for the surface finishing of cotton fiber by condensation polymerization in ethanol/water medium. The finished cotton fiber showed improved textile properties like tensile strength, wear comfortness, moisture absorption and wrinkle recovery, but decreased swelling in aqueous solution. The finished cotton fibers were characterized by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) and Energy Dispersive X-ray (EDX), thermogravimetric analysis (TGA) and derivative thermogravimetry (DTG). Attachment of silane coupling agents was confirmed and the finished cotton fiber showed increased thermal stability than the unfinished cotton. The finished cotton fiber showed higher reactive dye exhaustion due to silane coupling agent imparts new reactive sites for dye molecule on cotton fiber. The finished cotton fiber showed excellent fastness properties like washing, sunlight and chemical fastness properties. Improved textile properties of the silane finished cotton fiber with higher flexibility due to the presence of Si-O bond between the silane coupling agents and the cotton fiber, causes increased wear comfortness. Possible applications include use of the finished fibers as textile materials and garments.

摘要

以乙烯基三甲氧基硅烷（VTMS）、乙烯基三乙氧基硅烷（VTES）、甲基丙烯酸三甲氧基硅烷丙基丙酯（TSPM）、甘氨酰氧基丙基三乙氧基硅烷（GPTES）和氨丙基三乙氧基硅烷（APTES）为偶联剂，在乙醇/水介质中对棉纤维进行了缩聚整理. 整理后的棉纤维在拉伸强度、穿着舒适性、吸湿性、折皱回复性等方面均有所提高，但在水溶液中溶胀性有所降低. 采用傅立叶变换红外光谱（FTIR）、扫描电镜（SEM）、X射线衍射（XRD）、能谱（EDX）、热重分析（TGA）和导数热重分析（DTG）等方法对整理后的棉纤维进行了表征. 证实了硅烷偶联剂的存在，整理后的棉纤维热稳定性比未整理的棉纤维有所提高. 由于硅烷偶联剂为棉纤维上的染料分子赋予了新的活性位，使棉纤维的活性染料上染率提高. 整理后的棉纤维具有优良的耐洗、耐日光、耐化学腐蚀等牢度. 由于硅烷偶联剂和棉纤维之间存在Si-O键，硅烷整理棉纤维的纺织性能得到改善，具有更高的柔韧性，从而提高了耐磨性. 可能的应用包括将成品纤维用作纺织材料和服装.

KEYWORDS:

• Cotton fiber
• silane coupling agents
• textiles
• finishing
• fibers
• swelling behavior

关键词:

• 棉纤维
• 硅烷偶联剂
• 纺织品
• 整理
• 纤维
• 溶胀性能

Conflicts of interest

The authors declare there are no conflicts of interest.