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【答案】应助回帖
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明胶(Gelatin)能和羧甲基纤维素钠(CMC)形成共凝聚物,这一特性也在我们的实验中得到了验证。可能的机理如下:
CMC能在水中电离,生成大量的—COO-,从而形成带负电的大分子(图A),pH约为7.0~7.8。明胶主体成分为蛋白质,在该pH条件下主要发生酸式电离,能生成大量的—NH3+,从而形成带正电的大分子。正负电荷相互作用,互相吸引,共同凝聚,形成稳定的分散体系。
Gelatin and CMC can form gel copolymer, which has been validated in our experiment. The possible mechanism is as follows:
CMC may be electronionized in water to form quantities of -COO-, thus further forming macromolecules with electronegative charge whose pH value is about 7.0-8.0. The main component of gelatin is protein that can be acidically electroionized to produce many —NH3+, thus forming macromolecules with electropositive charge. Interaction and abstract of electronegative and elctropositive charges cause gelation to form stable dipersing system. |
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