CAJ | 학술논문

以松香与甲基丙烯酸-2-羟乙酯反应得到酯化物( RH)为聚合单体,代替部分苯乙烯( St),二乙烯基苯( DVB)为交联剂,明胶作分散剂,偶氮二异丁腈为引发剂,采用悬浮聚合法在油酸改性Fe3 O4的存在下制备了磁性聚合物微球,并研究了油酸改性Fe3 O4的用量对微球性能的影响。采用红外光谱、热重分析、X射线衍射分析、光学显微镜、扫描电镜、透射电镜、X射线光电子能谱等方法对微球进行结构表征,通过磁性测量系统测试了微球的磁滞回线。结果表明：在单体配比m(RH)∶m(St)∶m(DVB)=1∶1.5∶0.4,引发剂和分散剂用量分别为单体总量的1%和6%,制备的含松香的磁性聚合物微球球形好、磁性强,微球具有顺磁性。当油酸改性Fe3 O4的用量增大时,微球颗粒粒径逐渐增大,粒径分布变宽,饱和磁强度增大。
이송향여갑기병희산-2-간을지반응득도지화물( RH)위취합단체,대체부분분을희( St),이을희기분( DVB)위교련제,명효작분산제,우담이이정정위인발제,채용현부취합법재유산개성Fe3 O4적존재하제비료자성취합물미구,병연구료유산개성Fe3 O4적용량대미구성능적영향。채용홍외광보、열중분석、X사선연사분석、광학현미경、소묘전경、투사전경、X사선광전자능보등방법대미구진행결구표정,통과자성측량계통측시료미구적자체회선。결과표명：재단체배비m(RH)∶m(St)∶m(DVB)=1∶1.5∶0.4,인발제화분산제용량분별위단체총량적1%화6%,제비적함송향적자성취합물미구구형호、자성강,미구구유순자성。당유산개성Fe3 O4적용량증대시,미구과립립경축점증대,립경분포변관,포화자강도증대。
Rosin was reacted with 2-hydroxyethyl methacrylate and an ester ( denoted as RH) was formed. Then polymerization was carried out in the presence of oleic acid-modified Fe3 O4 magnetic fluid, with RH and styrene (St) as monomers, divinylbenzene (DVB) as cross-linking monomer, gelatin as dispersant, 2, 2-azobisiso-butyronitrile ( AIBN) as initiator. The magnetic polymer microspheres with rosin moiety were prepared by suspension polymerization and the effect of the magnetic fluid content on the magnetic polymer microspheres was investigated. The structures and properties of the magnetic polymer microspheres were characterized by Fourier transform-infrared spectroscopy, thermogravimetry, X-ray powder diffraction, optical microscopy, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectrometer. Hysteresis loops of the microspheres were tested by magnetic measuring system. The results indicated that at a monomer ratio of m(RH)∶m(St)∶m(DVB) =1∶1. 5∶0. 4, and the amounts of AIBN and gelatin about 1% and 6% of the total monomers, respectively, the products were spherical with high superparamagnetism. When the amount of oleic acid-modified Fe3 O4 increased, the particle sizes of microspheres were gradually increased, the particle size distribution was broadened, and the saturation magnetic intensity increased.