材料导报
材料導報
재료도보
MATERIALS REVIEW
2012年
4期
5-8
,共4页
赵慎强%郑鑫%李杰%严彪
趙慎彊%鄭鑫%李傑%嚴彪
조신강%정흠%리걸%엄표
磁性%四氧化三铁%纳米颗粒%接枝聚合%表面修饰%苯乙烯%甲基丙烯酸甲酯
磁性%四氧化三鐵%納米顆粒%接枝聚閤%錶麵脩飾%苯乙烯%甲基丙烯痠甲酯
자성%사양화삼철%납미과립%접지취합%표면수식%분을희%갑기병희산갑지
magnetic%Fe3O4%nanoparticles%graft polymerization%surface modification%styrene%methylmethacrylate
以氨水作为沉淀剂并控制溶液的pH值,采用Fe3+和Fe2+共沉淀法制得了磁性四氧化三铁纳米颗粒.合成的磁性纳米颗粒通过高分辨透射电镜、X射线衍射仪、傅里叶变换红外光谱仪进行了表征.四氧化三铁纳米颗粒的粒径约为10nm,其表面含有丰富的羟基.为了增强磁性四氧化三铁纳米颗粒和聚合物基质之间的相互作用,在纳米颗粒的表面接枝上乙烯基单体.傅里叶变换红外光谱仪和热重分析仪的测试结果显示,聚合物链共价结合在纳米颗粒表面.表面接枝聚合后,四氧化三铁纳米颗粒由极性转变为非极性.
以氨水作為沉澱劑併控製溶液的pH值,採用Fe3+和Fe2+共沉澱法製得瞭磁性四氧化三鐵納米顆粒.閤成的磁性納米顆粒通過高分辨透射電鏡、X射線衍射儀、傅裏葉變換紅外光譜儀進行瞭錶徵.四氧化三鐵納米顆粒的粒徑約為10nm,其錶麵含有豐富的羥基.為瞭增彊磁性四氧化三鐵納米顆粒和聚閤物基質之間的相互作用,在納米顆粒的錶麵接枝上乙烯基單體.傅裏葉變換紅外光譜儀和熱重分析儀的測試結果顯示,聚閤物鏈共價結閤在納米顆粒錶麵.錶麵接枝聚閤後,四氧化三鐵納米顆粒由極性轉變為非極性.
이안수작위침정제병공제용액적pH치,채용Fe3+화Fe2+공침정법제득료자성사양화삼철납미과립.합성적자성납미과립통과고분변투사전경、X사선연사의、부리협변환홍외광보의진행료표정.사양화삼철납미과립적립경약위10nm,기표면함유봉부적간기.위료증강자성사양화삼철납미과립화취합물기질지간적상호작용,재납미과립적표면접지상을희기단체.부리협변환홍외광보의화열중분석의적측시결과현시,취합물련공개결합재납미과립표면.표면접지취합후,사양화삼철납미과립유겁성전변위비겁성.
Magnetic Fe3O4 nanoparticles were prepared by the co-precipitation of Fe3+ and Fe2+.NH3 · H2O was used as the precipitating agent to control the pH value.The synthesized magnetic nanoparticles were characterized by HRTEM,XRD and FT-IR.The primary size of Fe3O4 nanoparticles is around 10nm and the surface of nanoparticles has plenty of hydroxyl groups.Afterwards,to enhance the interfacial interaction between the magnetic Fe3O4 nanoparticles and polymer matrix,an effective surface modification method was developed by grafting vinyl monomers onto the nanoparticles surface.That was,the surface of magnetic Fe3O4 nanoparticles was firstly treated with the coupling agent,KH570,which introduced reactive groups onto the surface of Fe3O4 particles,followed by radical graft polymerization in non-aqueous system.The testing results of FTIR and TG indicate that the polymer chains have been covalently bonded to the surface of the magnetic Fe3O4 nanoparticles.After the surface graft polymerization,Fe3O4 nanoparticles are varied from polarity to non-polarity.