煤油基Fe_3O_4磁性流体制备及表征.pdf

»36 »9ù2008M9Ä ý  ˜ ‹ NEW CHEM ICAL MATERIALSVol1 36 No19# 47#Á[":SE1– SÐÁ(I|: 20476065, 20736004);Ï SýVñîMQ‹Ð¯"dSE×ÄLiÁ(I|: 2006- 5);Ï Sý¿Äî¿ÄSE×ÄLiÁ(I|: 2006- 902);2ØD SvÐù?Á(NY0586)T€eº:©½<(1983 - ) ,3,«Vùî3,ùîZ_¹,ÜHŸ‹bó"¦: Ï:(1966 - ),3,ýÐpV,qb¿²Fe3O4HŸ@8Å!#V˜任志强1 洪若瑜1, 2* B. Xu3 李洪钟2( 1.苏州大学化学化工学院江苏省有机合成重点实验室, 苏州215123;2.中科院过程工程研究所多相反应国家重点实验室, 北京100080;3.Nanotec Inc. (Suzhou), SIP 苏州215123)K 1 以FeCl3 和FeSO4 为铁源,以煤油为载液,用油酸为表面改性剂,采用一步法制备煤油基Fe3O4 磁性流体b研究发现油酸可以成功地包覆在磁性颗粒表面, Fe3O4 磁性颗粒平均粒径为10~ 20nm,晶型为反尖晶石型;磁性流体磁化率为61 53@ 10- 4,磁化强度为201 9emu/g,可以长期稳定存在b1oM 磁性流体,纳米粒子,表面改性Preparation and characterization of kerosene-based magnetic fluidRen Zhiqiang1 Hong Ruoyu1, 2 Xu Bai3 Li Hongzhong2(11 Chem. Eng. Dept. & Key Lab. of Organic Synthesis of Jiangsu Prov. ,Soochow Univ. , SIP, Suzhou 215123;21State Key Lab. of Multiphase Reaction, Inst. of Proc. Eng. , Chinese Academy of Sciences,Beijing 100080;31Nanotec Inc. (Suzhou), SIP, Suzhou 215123)Abstract Using FeCl3 and FeSO4 as iron sources, keroseneas carrier liquid and oleicacid as surfacemodification a-gent, kerosene-based magnetic fluid was prepared by a one-step method. It was found that the nanoparticles were coatedsuccessfully by oleicacid. The mean size of the magnetic nanoparticles were about 10~ 20nm, and their morphology wasinverse spinel. The synthesized magneticfluid demonstrated excellent stability, and had susceptibility of 61 53@ 10- 4 andsaturation magnetization of 2019emu/ g.Key words magnetic fluid, nanoparticle, surface modificationHŸ@8,»ëH@8,ñ^¹ù¿VëŸ4¥T¨,|,Ü)¥HŸ,Ü ì0 (sÛAÏ7™î¥×ç‹88",× ïÆ<HÆT¨/ñ¯?Éùû×çbHŸ@8^BÕ¨o<W¥Äý‹,‹¨#žÈáa²B 7a3þD0abÄ48a]Ñù4aÊ €s ÖaÌa?÷#«?/Œ©Ú/Œ[1-2]bHŸ@8ô A¥‚],vÁ Vs£HŸ@8„²HŸ@8b£HŸ@8Eçµ·4Ìâ¥ê™,y7sž<W1ÿ[ 3-5] ,Œ^®¿£¥Ÿ1 v,µþ·³Ÿµ,yNBçñÅÿ‹¨b7²A V[EçÙ5,1 Èn¥²HŸ@8µ¿²að²a ÖaA²#YPQ©[6-9]b.dÅ!HŸ@8¥ZE¹„E,'5Å!,ÜHŸR ì,–ªÉB„sÛžAÏb.dZE„çNë,OÅ!VñÏ,Ü R ì¸^?3v ,ê™vb'ùeL¥B„EÅ![¿²¹AaVë­²Ö¥Fe3O4HŸ@8,¾ZE V[êÅ!HŸ@8¥„ç,¿ÿHŸ@8¥Ÿ?b1 L†s1. 1 ð„NFeCl3 # 6H2O( AR)aFeSO4 # 7H2O( AR) ,ÏSD0("v)ZÄÐk4³; NH3 # H2O( AR),~ÊñEgY½ÄýÌ;²Ö( CP) ,R–gZ¬Äýk4Ì;¿²,ý<);í£Y?( AR) ,ÏSZ’–ÄýBÌb1. 2 ¿²Fe3 O4HŸ@8¥Å!HŸ R ì¥Å!Vñ•nM1ÓD[3-4] ,[¿²¹A,–ª[²Ö¹¿Ÿ4,­,ÜFe3O4 R ì¥Vë,P,Ü R ìïT²Ÿ,¨B„E›î,ÜHŸ@8¥Å!,8{Në¥ÏW) ØVñ, V[hÅ!VñÏ,Ü ì0¥v,ihlA†bb1. 3 ©kNÄý˜‹»36 ÅSAvatar360˜° ë=MУ“;öN( KBrâË);D/Max-IIIC˜XLxN,°' Øг; TEM-2010˜ÚsOqiÈä,°'° ë³;‡SMALVERNHPPS5001; ìsN; FD-TX-FM-A˜®H?Ü,2Ø¥ùÈ0µK³; 2810˜,“- Vns;;9,°'°ë³;°' ØùBHV-55’î"ÖH<9b2 ²TÐ)‚2. 1 HŸ@8 R ì¥IRsm1( a)a(b)sY^,ÜFe3O4 ì0ܲÖVë) Ø-ª¥FT-IR;ömbm1(a)Ï, 58618cm- 1)¹Fe-Oo¥+˜l‚, 16371 0cm- 1)¹-OHl‚b7m1( b)Ï,2400cm- 1¸ÍCC= O+˜l‚, 14501 9cm- 1)CCOO-Fe%ê’îl‚b®¿¿Ÿª¥,ÜFe3O4 R ì^ÜV s!´¥,ƒVü²ÖÐ,Ü R ìVëiÄÐo†,²Ö¥ÆÐ,ÜFe3O4 ì0Vë¥Å?3 Ë»¿Öa?ê†3î
¥Q‹bQ‹TÂ/:Fe3O4(OH)x+ yHOOC- Ry Fe3O4( OH) x- y[ OOC- R]y+ yH2O, R = (CH2) 7CH = CH ( CH2)7CH3m1 ,ÜFe3O4 ì0¥FT-IRöm2. 2 HŸ@8 R ì¥TEMÈäsm2^Å!¥¿²HŸ@8 R ì¥TEMsb®m2 V[4³ž,¾ZEÅ!¥HŸ@8Ï,ÜFe3O4 R ì™·b ,sÛŸ“zbƒ^y¹B„E“vñ V[EçR ìv bm2 V[ A,¿Ÿª,Ü R ì“4ïCÍo™,Ü ( ìå¹10~ 20nmbm2 ,ÜFe3O4HŸ R ì¥TEMvË2. 3 HŸ@8¥HŸ?sHŸ‹K×1¥þ ØŸÉü^HŸ?bm3^P¨VSMN©ç¥¿Ÿª,ÜFe3O4¥HÌíLb®m3 V[ A,HŸ@8 R ìAUѨHŸ,,ÜFe3O4 R 쥄HÄ<¹581 3emu/g,ƒ1ÓD[ 3]¡´(651 98emu/ g){®bƒö1^y¹¾ZE¹†®î',Å!VñÏÀµ¨'Ÿ8¹,µFe3O4Ä,Œ„HÄ<¥†®‚^“üA,ªü¾ZE V[†îÚÉ¥HŸ@8bm3 ¿Ÿª,ÜFe3O4HŸ R ì¥VSMsmH9×^HŸ@8¥×1ŸÉbáÌ|Ť¥¿²HŸ@8YV®H?ÜH9×É›sbô L” ÂF- HÐF- H21"m,Âm4(a)a( b)b®m V©,¿²HŸ@8¥HÄq: V = 6153 @ 10- 4,HÄ<: M =2019emu/ gbªü¾ZEÅ!¥HŸ@8µ÷Ú¥„HÄ<, æ¨oEÅ!¥J&HŸ@8[7]¥„HÄ<ǹ1215emu/ gbm4 ¿²HŸ@8¥HÆ<ÐH9×¥1"m(a: F- H1"m, b: F- H21"m)2. 4 HŸ@8 R ì¥XRDsm5( a)a(b)^Å!¥,ÜFe3O4Ü¿Ÿ-ª¥XLxm, V[ A。