双电性β-甲壳素纳米纤维的制备及其在皮克林乳液中的应用  

Preparation of Zwitterionicβ-chitin Nanofibers and Its Application in Pickering Emulsion

作　　者：刘大营 徐凯 黄莎莎 张建明[1] LIU Daying;XU Kai;HUANG Shasha;ZHANG Jianming(College of Polymer Science and Engineering,Key Laboratory of Rubber-Plastics,Ministry of Education,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学高分子科学与工程学院,橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2024年第6期79-84,共6页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(21774068)。

摘　　要：开发了一种新型的双电性β-甲壳素纳米纤维。首先,以部分脱乙酰化的β-甲壳素为原料,经过TEMPO/NaClO2/NaClO氧化在其表面修饰上羧基官能团,然后再对其碱处理脱除乙酰氨基形成氨基,最后经过超声离心后获得了双电性β-甲壳素纳米纤维。该纳米纤维在酸性和碱性条件下良好的分散,具有广泛的pH稳定范围。通过调控双电性β-甲壳素纳米纤维表面电荷电离程度,纳米纤维在碱性条件下对环氧大豆油表现出了良好的乳化效果,展现了作为Pickering乳化剂的应用潜力。In this study,a novel zwitterionicβ-chitin nanofiber was developed.Firstly,the partially deacetylatedβ-chitin was subjected to TEMPO/NaClO2/NaClO oxidation and carboxyl groups were introduced into its surface,followed by alkali treatment to remove the acetylamino groups on chitin to form amino groups.Finally,after ultrasonic and centrifugal treatment,the zwitterionicβ-chitin nanofibers were obtained.The nanofibers can be stably dispersed under acidic and alkaline conditions,which indicates that it has a good stability in a wide pH range.By modulating the degree of charge ionization on the surface of the zwitterionicβ-chitin nanofibers,the nanofibers showed good emulsification of epoxidized soybean oil under alkaline conditions,demonstrating its potential application as Pickering emulsifier.The development of this novel zwitterionicβ-chitin nanofiber is helpful to promote the application of chitin nanomaterials.

关 键 词：甲壳素纳米纤维 β-甲壳素 TEMPO氧化 碱处理 双电性 

分 类 号：O636.1[理学—高分子化学]