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通过X-射线衍射,红外吸收光谱,研究了羧甲基羟丙基纤维素(CMHPC)结构和溶解性能的关系。结果表明:CMHPC的溶解性能归因于纤维素在醚化过程中的消晶作用,以及在纤维素中导入了羧甲基和羟丙基两种亲水基团。CMHPC不仅能溶于饱和的NaCl溶液,而且能溶于二价碱土金属盐溶液。
The structure and solubility of carboxymethylhydroxypropyl cellulose (CMHPC) were studied by X-ray diffraction and infrared absorption spectroscopy. The results show that the solubility of CMHPC can be attributed to the de-crystallization of cellulose during etherification and the introduction of two hydrophilic groups, carboxymethyl and hydroxypropyl, into cellulose. CMHPC not only soluble in saturated NaCl solution, but also soluble in divalent alkaline earth metal salt solution.