竹纤维素分子聚合度的粘度测定法及其应用-蒋应梯

竹纤维素分子聚合度的粘度测定法及其应用*蒋应梯,许炯(,310023):,Lyocell:;;Lyocell;:TQ91;S789:A:1005-3433(2005)03-0024-04,/,040,400421hm2,4300,,21)))Lyocell,Lyocell,Lyocell,,;,,))),,,Lyocell,,;,Lyocell,11.1竹纤维素样品纯化原理,,,NaOH,,,,EDTA,1.2纤维素分子聚合度测定原理,,()#24#2005393*:():(1962-),,,,,,,,,,,(25?1)e,(G),(G)[G]#C[G]#C,[G],:DP0.905=0.75[G]22.1竹纤维素样品的制备和纯化,10%NaOH,;1%EDTA,,,40g/m2,(),,2.2测定装置:(0.57?0.02)mm;:(0.80?0.05)mm;:(25?1)e,;:52mL2.3测定方法,:FZ/T50010.3-19985)))(A)6(G),G=G/G0=h#t5:h),-1;t5),GG/G0[G]#C[G]#C,[G][G],mL/g;C,g/mLDP[G]:DP0.905=0.75[G]DP2.3.1铜乙二胺溶液的配制250g2000mL,,,,20e,,:M2=(1.00?0.02)mol/L;R=2.00?0.04,2.3.2铜乙二胺溶液的标定25mL250mL,25mL500mL,250mL1mol/L30mL10%,0.1mol/LNa2S2O3,1g,,Na2S2O3V25Na2S2O3,200mL,,1mol/LNaOH:M1=(N1V1-2N2V2-N3V3)/(2V4@25/250):M2=N1V1/(V4@25/250):R=M1/M2#25#2005393:N1),mol/L;V1),mL;N2),mol/L;V2),mL;N3)NaOH,mol/L;V3)NaOH,mL;V4),mL2.3.3毛细管粘度计的校准(25?1)e,65%,,hh=0.86331212,0.9%~2.0%,3.1试样溶解瓶的选择,,,50mL,52mL3.2竹纤维素溶液浓度的选择,,[G]#C=3.0?0.5,[G],C,g/mL,,[G]#C3.5,,;,[G]#C2.5,,230~250mg/50mL表1竹纤维素分子聚合度粘度法测定结果DPDP(%)9469351.29749571.89869671.99249141.19349532.09589411.8101910051.4110610891.5111510951.89589670.99949770.7109510732.04Lyocell,,/Lyocell03Lyocell,850~1000Lyocell,958Lyocell,2.02dtex,1.22CN/dtex,,;,,,,850~1000,,,Lyocell,#26#2005393:[1]FZ/T50010.3-1998.[S].[2].[J].,2003,(1):13-14.[3],,,.[J].,1999,(2):38-39.[4].()[J].,1997,(1):25-27.[5],,.[J].,1993,(2):10-11,34.[6],,.Lyocell[J].,2000,(1):5-8.[7].[M].:,1997.[8]SAYEDU.().Lyocell[J].#,2002,(12):15-21.VISCOSIMETRICMETHODANDITSAPPLICATIONTOPOLYMERIZATIONDEGREEMEASUREMENTOFBAMBOOCELLULOSEJIANGYing-t,iXUJiong(ResearchInstitutesofForestryScienceofZhejiangProvince,Hangzhou310023,China)Abstract:Principle,significance,operationformeasuringpolymerizationdegreeofbamboocellulosewithaviscosim-etricmethod,anditsapplicationinthedevelopmentoftheLyocellcellulosefrombamboowereintroduced.Keywords:bamboocellulose;polymerizationdegree;Lyocellcellulose;viscosimetricmethod(:2005-01-27)pp562005228,56,200611568,,,;,,,,()#27#2005393