MEILESI®美乐仕®天禾®纤维素醚常见型号分类

MEILESI®Common classification of cellulose ethers 

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MEILESI®美乐仕®天禾®纤维素醚”RR”代表经过表面处理,属于速溶型产品。 

 

MEILESI®Cellulose ether "RR" stands for surface treatment and belongs to instant products.

MEILESI®美乐仕®纤维素醚”是由广泛分布的天然纤维素(木&棉)材料制得的非离子型水溶性纤维素醚。用氢氧化钠水溶液处理纤维素来制备碱纤维素,然后与醚化剂反应,如一 氯甲烷,环 氧乙烷或环氧丙烷,从而制得美乐仕产品。虽然纤维素含有许多亲水性的羟基,但它不会溶解于水。这是因为羟基间产生强的分子间作用,从而形成晶体结构,防止水进入纤维素分子的间隙。

在醚化阶段,一些纤维素上羟基的氢原子被甲 氧基(- OCH3),羟乙氧基(- OCH2CH2OH)或羟丙氧基(- OCH2CHOHCH3)所取代,这些取代基消除相应的分子间作用,使MEILESI®美乐仕®纤维素醚产品具有水溶性。

根据您的应用领域,MEILESI®美乐仕®天禾®纤维素醚作为一种选择,可替代瓜尔胶产品。

MEILESI® products is a nonionic water-soluble cellulose ether which is derived from natural cellulose (pulp & cotton).The cellulose reacts with Sodium hydroxide solution to produce an alkali cellulose , then alkali cellulose reacts with etherification agents such as methyl chloride, propylene oxide or ethylene oxide to get MEILESI® product . Although cellulose contains many hydrophilic hydroxyl groups, it will not dissolve in water. That is because hydroxyl groups can create strong intermolecular hydrogen bondings, and form crystal structures to prevent water flowing into the interval between cellulose molecules.

During the etherification phase, some hydrogen atoms of the hydroxyl groups of cellulose are substituted by methyl groups (-CH3), hydroxypropyl groups (-CH2CHOHCH3), or hydroxyethyl groups (-CH2CH2OH), and these substituents can eliminate intermolecular hydrogen bondings to makeMEILESI® product water-soluble.

Depending on your application,MEILESI® products would be a choice to replace Guar gum.


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