磁性材料及器件
磁性材料及器件
자성재료급기건
JOURNAL OF MAGNETIC MATERIALS AND DEVICES
2013年
5期
1-5,11
,共6页
乔秀颖%卢秀首%龚兴龙%杨涛%李伟%孙康%陈晓东
喬秀穎%盧秀首%龔興龍%楊濤%李偉%孫康%陳曉東
교수영%로수수%공흥룡%양도%리위%손강%진효동
磁流变弹性体%热塑性弹性体%羰基铁%SEEPS%性能
磁流變彈性體%熱塑性彈性體%羰基鐵%SEEPS%性能
자류변탄성체%열소성탄성체%탄기철%SEEPS%성능
magnetorheological elastomer%thermoplastic elastomer%carbonyl iron%SEEPS%properties
选用性能优良的聚(苯乙烯-b-乙烯-b-乙烯-丙烯-b-苯乙烯)(SEEPS)热塑性弹性体代替传统橡胶为基体、软磁性羰基铁粉为磁性填料,采用熔融共混技术制备得到弹性好、磁流变效应高的新型各向同性和各向异性SEEPS基热塑性磁流变弹性体(MRE)复合材料。详细地介绍了两类材料的制备方法,系统地研究了基体分子量、羰基铁含量和外加磁场强度等因素对材料结构和性能的影响。羰基铁粉在各向同性MRE复合材料中呈现无规均匀分散,在各向异性MRE复合材料中呈现明显链状定向有序结构。高分子量基体吸油性优于低分子量基体,柔软度更高,加工性能更好,强度和韧性受高填充羰基铁的影响小,磁流变效应也更高。各向异性MRE比各向同性MRE具有更高的储能模量和磁流变效应。
選用性能優良的聚(苯乙烯-b-乙烯-b-乙烯-丙烯-b-苯乙烯)(SEEPS)熱塑性彈性體代替傳統橡膠為基體、軟磁性羰基鐵粉為磁性填料,採用鎔融共混技術製備得到彈性好、磁流變效應高的新型各嚮同性和各嚮異性SEEPS基熱塑性磁流變彈性體(MRE)複閤材料。詳細地介紹瞭兩類材料的製備方法,繫統地研究瞭基體分子量、羰基鐵含量和外加磁場彊度等因素對材料結構和性能的影響。羰基鐵粉在各嚮同性MRE複閤材料中呈現無規均勻分散,在各嚮異性MRE複閤材料中呈現明顯鏈狀定嚮有序結構。高分子量基體吸油性優于低分子量基體,柔軟度更高,加工性能更好,彊度和韌性受高填充羰基鐵的影響小,磁流變效應也更高。各嚮異性MRE比各嚮同性MRE具有更高的儲能模量和磁流變效應。
선용성능우량적취(분을희-b-을희-b-을희-병희-b-분을희)(SEEPS)열소성탄성체대체전통상효위기체、연자성탄기철분위자성전료,채용용융공혼기술제비득도탄성호、자류변효응고적신형각향동성화각향이성SEEPS기열소성자류변탄성체(MRE)복합재료。상세지개소료량류재료적제비방법,계통지연구료기체분자량、탄기철함량화외가자장강도등인소대재료결구화성능적영향。탄기철분재각향동성MRE복합재료중정현무규균균분산,재각향이성MRE복합재료중정현명현련상정향유서결구。고분자량기체흡유성우우저분자량기체,유연도경고,가공성능경호,강도화인성수고전충탄기철적영향소,자류변효응야경고。각향이성MRE비각향동성MRE구유경고적저능모량화자류변효응。
Novel isotropic and anisotropic SEEPS-based thermoplastic magnetorheological elastomers (MRE) composites possessing good elasticity and high magnetorheological effect were prepared by melting blending technique with the poly(styrene-b-ethylene-ethylene-propylene-b-styrene) (SEEPS) as matrix substituting traditional rubber and carbonyl iron powders as magnetic fillers. In this paper, the preparation method of SEEPS-based MRE composites was described in detail, and effects of matrix molecular weight, carbonyl iron concentration and external magnetic field intensity on the structure and properties of the SEEPS based MRE composites were investigated systemically. Carbonyl iron powders exhibit random and uniform dispersion in isotropic MRE composites, and obvious oriented and ordered chain-like structures in anisotropic MRE composites. Compared with lower molecular weight matrix, the higher molecular weight matrix possesses better oil adsorbility, softness and processibility, higher magnetorheological effect, and less influence on the strength and toughness by higher filling of carbonyl iron. Isotropic MRE composite shows higher storage modulus and magnetorheological effect than the anisotropic MRE composite does.