纳米原纤化纤维素物化特性表征
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摘要
纳米原纤化纤维素(Nanofibrillated Cellulose,NFC)是一种新型纳米纤维素材料,应用前景极为广阔.分析表征了国产NFC产品的微观形貌、比表面积、保水值、聚合度、表面电荷性能、分散稳定性、化学结构、结晶结构、热稳定性等物化特性,并与常规纤维素纤维进行对比.结果表明:NFC为细丝状和带状共混网络状结构,柔顺性好,绝大部分细丝或带状物直径为10~60nm,形态和尺寸与普通纤维素纤维有很大区别.NFC表面带负电荷,在水介质中分散稳定性极好,阳电荷需求量为31.6μmol·g~(-1),Zeta为-45mV;比表面积为35.79m2/g;保水值为637.36%;聚合度为693;结晶度为59.87%.红外光谱、XRD和热重等分析表明NFC仍保留天然纤维素的化学结构和结晶结构特点.
Nanofibrillated Cellulose(NFC),a new kind of nano-cellulose material exhibits good application prospects in many fields.In the present work,microstructure,specific surface area,water retention value,degree of polymerization,surface charge characteristics,dispersion stability,chemical structure,crystalline structure and thermogravimetric stability of industrialized NFC were characterized.Results showed that NFC exhibited flexible filaments and ribbon shape,the mean diameter of NFC was 10~60nm,which differ from conventional cellulose fiber.The specific surface area,water retention value,charge quantity,Zeta potential,degree of polymerization and crystallinity of NFC were 35.79 m2/g,637.36%,31.6μmol·g-1,-45 mV,693and 59.87%,respectively.NFC has an excellent dispersion stability in aqueous suspension with negatively charged.XRD,FT-IR and TG results indicated that NFC had the same chemical and crystalline structures with respect to conventional cellulose.
Nanofibrillated Cellulose(NFC),a new kind of nano-cellulose material exhibits good application prospects in many fields.In the present work,microstructure,specific surface area,water retention value,degree of polymerization,surface charge characteristics,dispersion stability,chemical structure,crystalline structure and thermogravimetric stability of industrialized NFC were characterized.Results showed that NFC exhibited flexible filaments and ribbon shape,the mean diameter of NFC was 10~60nm,which differ from conventional cellulose fiber.The specific surface area,water retention value,charge quantity,Zeta potential,degree of polymerization and crystallinity of NFC were 35.79 m2/g,637.36%,31.6μmol·g-1,-45 mV,693and 59.87%,respectively.NFC has an excellent dispersion stability in aqueous suspension with negatively charged.XRD,FT-IR and TG results indicated that NFC had the same chemical and crystalline structures with respect to conventional cellulose.
引文
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[3]Andresen M,Stenstad P,Moretro T,et al.Nonleaching antimicrobial films prepared from surface-modified microfibrillated cellulose[J].Biomacromolecules,2007,8(7):2 149-2 155.
[4]Lavoine N G,C Tabary,N Desloges,et al.Elaboration of a new antibacterial bio-nano-material for food-packaging by synergistic action of cyclodextrin and microfibrillated cellulose[J].Innovative Food Science&Emerging Technologies,2014,26(12):330-340.
[5]Rodionova G L,M Eriksen,O Gregersen.Surface chemical modification of microfibrillated cellulose:Improvement of barrier properties for packaging applications[J].Cellulose,2011,18(1):127-134.
[6]Siqueira G,Bras J,Dufresne A.New process of chemical grafting of cellulose nanoparticles with a long chain isocyanate[J].Langmuir,2010,26(1):402-411.
[7]Nathalie Lavoine,Clara Givord,Nicolas Tabary,et al.Elaboration of a new antibacterial bio-nano-material for food-packaging by synergistic action of cyclodextrin and microfibrillated cellulose[J].Innovative Food Science and Emerging Technologies,2014,26:330-340.
[8]Martin Andresen,Per Stenstad,Trond Mretr.Nonleaching antimicrobial films prepared from surfacemodified microfibrillated cellulose[J].Biomacromolecules,2007,8:2 149-2 155.
[9]A Lpez Rubio,J M Lagaron,M Ankerfors.Enhanced film forming and film properties of amylopectin using micro-fibrillated cellulose[J].Carbohydrate Polymers,2007,68:718-727.
[10]Jue Lu,Tao Wang,Lawrence T Drzal.Preparation and properties of microfibrillated cellulose polyvinyl alcohol composite materials[J].Composites,2008,39:738-746.
[11]《材料科学技术百科全书》编辑委员会.材料科学技术百科全书[M].北京:中国大百科全书出版社,1995.
[12]江泽慧,王汉坤,余雁,等.植物源微纤化纤维素的制备及性能研究进展[J].世界林业研究,2012,25(2):46-50.
[13]赵娜,李倩,Chul B.Park.超临界scCO2制备微纤化纤维素/聚乙烯醇复合微发泡材料[J].化工学报,2014,65(9):221-225.
[14]杨国鑫.微纤化纤维素造纸增强与助留技术的研究[D].西安:陕西科技大学,2014.
[15]杨淑蕙.植物纤维化学[M].3版.北京:中国轻工业出版社,2011.
[16]Zimmermann T,Bordeanu N,Strub E.Properties of nanofibrillated cellulose from different raw materials and its reinforcement potential[J].Carbohydrate Polymers,2010,79(4):1 086-1 093.
[17]周素坤,毛健贞,许凤.微纤化纤维素的制备及应用[J].化学进展,2014,26(10):1 752-1 762.
[18]Alemdar A,Sain M.Biocomposites form wheat straw nanofibers:Morphology,thermal and mechanical properties[J].Compos.Sci.Technol.,2008,68(2):557-565.
[19]Siqueira G,Bras J,Dufresne A.Luffa cylindrica as a lignocellulosic source of fiber,microfibrillated cellulose and cellulose nanocrystals[J].Bioresources,2010,5(2):727-740.
[20]Heux L,Dinand E,Vignon M.R.Structural aspects in ultrathin cellulose microfibrils followed by 13C CP-MAS NMR[J].Carbohydrate Polymers,1999,40(2):115-124.