改性纳米SiO2磺化聚苯乙烯马来酸酐降粘剂的研究

SiO2/231,2,2,1,1,1(1.,100044;2.,100029):,,/2,,,,0.5%()7.5%()83.3%,18016h90%:;;2;:TE254:A:100129731(2009)03204982031,,,(FCLS),,2(SSMA),260,,[1,2],SSMA,[3]/[4],22.1,AR,;,AR,;,CP,;,AR,;,AR,2.2/2,20N29095,2.53h20,,2[5,6],20,2h30%40%pH67,,,,22,,,,46h,,60653h,4800r/min30min,,/22.3[7]30,[],MW:[]=0.770410-4M0.72522.4BrukerEQUINOX55,KBrLEO21450TA25200DSC2TGA,N2,700,20/min2.57.5%,89420093(40)3:(50674006):2008211224:2009202203::(1978-),,,,,24h,18016h,ZNN2D6,(%):DI1=100-1001100100DI1,%;100100;100110033.11/(A)/(B)SiO2//(C)1,(A)18561777cm-1,(B)15041451709cm-115011456694cm-1,(B)11291044cm-1(C),1103cm-1SiO,473cm-1SiOSi,952cm-1SiOH,1633cm-11//SiO2//Fig1FTIRspectraofsamplesofPS/maleican2hydridecopolymerandsulfonatedpolysty2rene/maleicanhydridecopolymerandnano2modifiedSiO2/sulfonatedpolystyrene/maleicanhydridecopolymer3.2SEM2SiO2//2,200nm3.3TGA3/SiO2//3,/350,450,88.4%,350450,SiO2//(b)45030%,3.411,90,3h,SMA(4)4Fig4Effectofinitiatoronmolecularweightandper2formanceofcopolymer,,,994:SiO2/21000100004,,SMA,SMA3.5,,,,5,,,21,5Fig5Theeffectofthemolarratioofsulfonationa2gentandstyreneonviscosityreductionrate3.6,6,,,,,,0.8,,,,,,6Fig6TheeffectofthemolarratioofTEOSandsty2reneonviscosityreductionrate3.77,2(B)SiO2/2(A)7,,SiO2/22,0.5%(),7SiO2/22Fig7ContrastoffreshwatermudviscosityreductionratebetweenmodifiedSiO2/sulfonatedpolysty2rene2maleicanhydrideandsulfonatedpolysty2rene2maleicanhydride4SiO2/2,90%,180,,,:[1]ChesserBG.[J].SPE,1980,8244:4142421.[2],.[J].,1989,4:54256.[3]NgomsikAF,BeeA,DrayeM,etal.[J].ComptesRendusChimie,2005,8:9632970.[4],,,.[J].,2007,38(9):149621498,1506.[5],,,.[J].,2005,22(3):1952198.[6],,.[J].,2000,17(2):1222l25.[7],,,.[J].,2001,15:18.(504)00520093(40)[3],.[J].,2006,25(4):16219.[4],,,.[J].,2007,22(1):59264.[5].[M].:,2006.11220.[6],,.[J].,2004,17(1):10214.[7],,,.[J].,2002,29(5):6032606.[8]SchwillePO,SchmiedlA,HerrmannU,etal.[J].UrolRes,1999,27:1172126.[9],,.[J].,2000,9(10):7472748.[10]MckeeMD,NanciA,khanSR.[J].JBoneMinerRes,1995,10(12):191321929.ResearchonnanocrystallitesinurinesofhealthypersonsandlithogenicpatientsbynanoparticlesizeanalyzerHUANGZhi2jie,XUXiao2jing,KUANGLi,OUYANGJian2ming(InstituteofBiomineralizationandLithiasisResearch,JinanUniversity,Guangzhou510632,China)Abstract:TheZetapotential,intensity2autocorrelationcurve,meansizeanddistributionofnanocrystalliteswithasizelessthan1000nminurinesoflithogenicpatientsandhealthypeoplewereinvestigatedbynanoparticlesizeanalyzerandtransmissionelectronmicroscope(TEM).ItindicatedthattheZetapotentialofnanocrystallitesinlithogenicurines(withanaveragevalueof-3.62mV)wasmuchlargerthanthatinhealthyurines(meanvalue-10.1mV)underthesimilarurinepH(about6.0).Comparingwithhealthyurines,thescatteringintensityofnanocrystallitesinlithogenicurineshadmuchlongercorrelation.Itrevealedthatthesizeofnanocrystallitesinlithogenicurineswaslargerthanthatinhealthyurines.Sizedistributionmeasurementfurtherindicatedthatmostofthenanocrystallitesinhealthyurineshadasizeoflessthan350nm,whilethesizeofmostofthenano2crystallitesinlithogenicurineswaslargerthan600nm.Theexperimentalresultsinthisarticlemayhelpustounderstandthedifferencebetweenhealthyurinesandlithogenicurines,whichcouldprovidecluesfortheearlydiagnoseofurolithiasis.Keywords:nanoparticlesizeanalyzer;intensity2autocorrelationfunction;TEM;sizedistribution;zetapotential(500)Studyonnano2modifiedSiO2/sulfonatedpolystyrene2maleicanhydrideviscosityreducerZHANGYong2ming1,ZHUHong2,WANGFang2hui2,HUANGYi1,WEIYong2sheng1,ZHANGLan1(1.SchoolofScience,BeijingJiaotongUniversity,Beijing100044,China;2.SchoolofScience,BeijingUniversityofChemicalTechnology,Beijing100029,China)Abstract:Theviscosityreducerofnano2modifiedSiO2/sulfonatedpolystyrene2maleicanhydridewaspreparedandthestyreneandmaleicanhydridearemonomers,oleumisthesulfonatingagent,tetraethyoxysilaneisnanometerSiO2precursor.Theeffectionofinitiatorconcentration,theamountofoleumadditionandtetraethyoxysilaneoncopolymeryield,weightmolecularandpropertiesoftheviscosityreducerwereinvestigated.ThenanocompositematerialwascharacterizedbyFTIR,SEMandThermalanalysisanditsperformancewastested.Resultsshowedthenanocompositematerialhadhighthermalstabilityandtheviscosityreducersynthesizedundertheoptimumreactionconditionshadtherateofviscosityreducingof7.5wt%water2basedmudupto83.3%atambienttem2peratureandupto90%afteraged16hat180attheconcentrationof0.5wt%.Keywords:nano2modifiedSiO2;sulfonate;polystyrene2maleicanhydride;viscosityreducer40520093(40)