REN Dongyin1 ， WANG Qibao1 ， GAI Guosheng2
（1. School of Chemical and Environmental Engineering， China University of Mining and Technology（Beijing）， Beijing 100083， China； 2. School of Materials Science and Engineering， Tsinghua University， Beijing 100084， China）
Abstract：The emulsion stabilized by natural chitosan can not be demulsified completely by the effect of CO2 when chitosan is used as a CO2-switchable emulsifier. In order to resolve this problem, the magnetic Fe3O4 nanoparticles have been grafted in chitosan.The FT-IR and SEM tests confirm that the magnetic Fe3O4 nanoparticles are grafted in the chitosan structure successfully, and the product aggregate in water with a shape of chitosan coat magnetic Fe3O4 nanoparticles. The conductivity experiments confirm that the grafting of Fe3O4 nanoparticles does not affect the CO2-responsive capability of chitosan, while the emulsification experiments confirm that the grafting does not affect the emulsification capability of chitosan. The CO2-magnetic experiments illustrate that the emulsion stabilize by the Fe3O4 nanoparticles-graft chitosan can be demulsified completely in the synergistic reaction of CO2 and magnetic.
Keywords：magnetic Fe3O4 nanoparticles; modification; chitosan; CO2-switchable emulsifier; magnetic synergistic demulsification
文章编号：1008-5548（2018）0４-0006-07
DOI：10.13732/j.issn.1008-5548.2018.04.002
收稿日期：2017-12-28， 修回日期：2018-05-10，在线出版时间：2018-07-04。
第一作者简介：任冬寅（1986—），女，博士研究生，研究方向为表面活性剂、开关型乳化剂及稠油的乳化降黏。E-mail：rendongyin@126.com。
通信作者简介：王启宝（1966—），男，博士，教授，博士生导师，研究方向为有机化工及界面化学、无机非金属材料、精细化学品化学等。E-mail：wqb@cumtb.edu.cn。
