The present invention relates to a kind of nonionic fluorocarbon surfactant, the chemical formula is C9F19COXCOC9F19, where X is NHC2H5OC2H5NH or (C2H5) 2NCH3 or N (C2H5) 3. The preparation method is as follows: the perfluorodecanoic acid and amine flexible connecting groups are added into the solvent according to the molar ratio of 1:2-3, and the nitrogen is circulated back to the reaction temperature for 24h to 48h; after the reaction is completed, the reaction is cooled to room temperature; the solvent and water are removed by rotating evaporator at 70 ~C, and dichloromethane or dichloromethane and ethyl are used. The mixture of alcohols is recrystallized, filtered under vacuum, and finally dried in vacuum. The non-ionic fluorocarbon surfactant of the present invention has remarkable surface tension reduction, small critical micelle concentration, large surface surplus, small average area of Amin molecule, very compact molecule and good wettability, low toxicity of both amide and ester surfactants, and can be widely used in industrial production. It also has excellent foaming properties, foaming and high foam stability. It can be used as foaming agent.
【技术实现步骤摘要】
一类非离子氟碳表面活性剂及其制备
本专利技术属于表面活性剂的科学与应用领域,尤其涉及一类非离子氟碳表面活性剂及其制备。
技术介绍
氟碳型表面活性剂特指将传统表面活性剂中碳氢链里的氢原子完全或者部分被氟原子取代的一类新型特种表面活性剂。相比于传统的表面活性剂,由于氟原子的特殊性使得氟碳型表面活性剂具有显著的“三高”以及“两憎”(憎水和憎油)的特性,即高化学稳定性、高表面活性和高热稳定性,使得它在工业领域上有着广泛的应用,尤其是在消防、涂料、纺织、杀菌等领域,其作用不是其它表面活性剂可以匹敌的。氟碳表面活性剂包括离子型氟碳表面活性剂、非离子型氟碳表面活性剂和两性氟碳表面活性剂。非离子氟碳表面活性剂因为在水中不能电离,不以离子形式存在,因而在一些方面具有离子型表面活性剂所不具有的优越性能,具体表现在以下几个方面:(1)比较稳定,不易受酸碱影响;(2)物态主要以浆状或者液态的形式存在,易于运输和携带,便于使用;(3)不会受到水中含量较高镁离子、钙离子等的影响,在硬水中性能良好;(4)不会受到无机盐类以及强电解质的影响,具有离子型氟碳表面活性剂所不具有的良好稳定性;(5)与 ...
【技术保护点】
1.一类非离子氟碳表面活性剂,其特征在于,化学式为C9F19COXCOC9F19,其中X为NHC2H5OC2H5NH或者(C2H5)2NCH3或者N(C2H5)3;结构式分别为:
【技术特征摘要】
1.一类非离子氟碳表面活性剂,其特征在于,化学式为C9F19COXCOC9F19,其中X为NHC2H5OC2H5NH或者(C2H5)2NCH3或者N(C2H5)3;结构式分别为:2.根据权利要求1所述非离子氟碳表面活性剂的制备,其特征在于,主要包括以下步骤:(1)全氟癸酸和胺类柔性连接基团按照1:2~3的摩尔比加入溶剂中,回流通氮气,升高到80到100℃,反应24h-48h;反应完毕后,静置冷却至室温;(2)在70℃用旋转蒸发仪旋蒸除去溶剂和水,利用二氯...
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