磁性高分子微球的合成研究─—带醛基磁性高分子微球的合成及表征  

STUDY ON PREPARATION OF MAGNETIC POLYMER MICROSPHERES ──THE PREPARATION AND CHARACTERIZATION OF MAGNETIC POLYMER MICROSPHERES CONTAINING SURFACE-CHO GROUPS

作　　者：李孝红[1] 孙宗华[1] 

机构地区：[1]中国科学院成都有机化学研究所

出　　处：《离子交换与吸附》1996年第6期486-492,共7页Ion Exchange and Adsorption

基　　金：国家自然科学基金

摘　　要：用超声波分散处理Ｆｅ３Ｏ４粉末同稳定剂溶液的分散体系，使Ｆｅ３Ｏ４粉末能稳定地分散成细微粒子，同时增强了Ｆｅ３Ｏ４细微粒子同单体、引发剂的亲合性。苯乙烯—丙烯醛共聚物为高分子壳层，包裹Ｆｅ３Ｏ４得到了带醛基的磁性高分子复合微球。微球粒径可控制在５０～２００μｍ，微球中Ｆｅ３Ｏ４含量在０．４～１．５％之间，通过电导滴定法测定微球表面醛基含量在０．０４～０．１ｍｍｏＬ·ｇ－１范围内。着重考察了引发剂体系、稳定剂体系、分散介质等对微球粒径、表面醛基含量的影响。The core- shell magnetic polymer microspheres containing - CHO groups have been prepared by dispersion copolymerization of styrene, acrolein in the presence of magnetic oxide modified by polyethylene glycol by ultrasonic dispersion. The diameter of microspheres can be controlled between 50 ￣ 200μm, and the content of Fe3O4 in microspheres is 0. 4￣1. 5 %, the content of- CHO groups of microspheres varies between 0. 04 ￣ 0. 1 mmol·g-1 determined by electrical conductance titration. The effects of initiator system, stabilizer system, dispersion medium on the diameter and the -CHO content of microshperes were investigated.

关 键 词：磁性 高分子 微球 复合微球 分散聚合 

分 类 号：O631.2[理学—高分子化学]