Abstract This study focusses on the synthesis of carboxymethyl guar gum (CMG) via monochloroacetic acid under alkaline conditions. The reaction conditions were also optimized during the course of experiment. Guar derivative with variable degree of substitution (DS) were prepared and were confirmed by Fourier transform infrared (FTIR) spectroscopy. The DS was determined quantitatively by titration method for each derivative. The synthesized guar gum derivatives, being the natural thickners, have been used in textile printing technology. Substituted guar gum has been proved environmental friendly thickener as compared to synthetic thickeners. Penetration properties, fixation ability, colour fastness, levelness and fabric handling was compared with alginate thickener (commercially available). Guar gum thickeners showed enhanced properties versus alginate thickener and can be used as an alternative to synthetic thickeners in view of its green, non-hazardous and economical derivatives. Guar gum is the outstanding natural thickener, stabilizer, gelling agent and could possibly be used in various industrial units including food, cosmetic, textile, oil fracturing and mining.

中文翻译：

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羧甲基瓜尔胶的绿色合成与表征：在纺织品印花技术中的应用

摘要 本研究的重点是在碱性条件下通过一氯乙酸合成羧甲基瓜尔胶 (CMG)。在实验过程中也优化了反应条件。制备了具有可变取代度 (DS) 的瓜尔胶衍生物，并通过傅里叶变换红外 (FTIR) 光谱进行了确认。DS 通过滴定法对每种衍生物进行定量测定。合成的瓜尔胶衍生物作为天然增稠剂，已用于纺织品印花技术。与合成增稠剂相比，取代的瓜尔胶已被证明是环境友好的增稠剂。将渗透性能、固色能力、色牢度、匀染度和织物处理与藻酸盐增稠剂（市售）进行比较。瓜尔豆胶增稠剂与藻酸盐增稠剂相比具有更强的性能，鉴于其绿色、无害和经济的衍生物，可用作合成增稠剂的替代品。瓜尔豆胶是优良的天然增稠剂、稳定剂、胶凝剂，可用于食品、化妆品、纺织、石油压裂和采矿等各种工业单位。