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-  2017 

纤维素纳米晶4种巯基化改性方法的对比研究 Comparative Study of Four Thiolation Modification Methods of Cellulose Nanocrystals

Keywords: 纤维素纳米晶,巯基功能化,酯化,酰胺化,Schiff碱反应,硅烷化反应

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Abstract:

通过4种不同的改性方法:酯化、酰胺化、Schiff碱反应、硅烷化反应,对纤维素纳米晶(CNCs)进行巯基化改性,通过傅里叶变换红外光谱(FT-IR)和X射线光电子能谱(XPS)对其表面进行表征,采用透射电子显微镜(TEM)和X射线衍射(XRD)评价其物理性能,通过与Ellman’s试剂反应确定其巯基含量,依据元素分析中硫元素含量确定CNCs的取代度.由于具有:1)反应条件温和,如反应温度较低、反应时间较短以及用水作溶剂;2)能较好地保持CNCs棒状形貌和结晶度指数(巯基化CNCs 80.3%);3)较高的巯基含量(0.348 mmol/g)和取代度(0.224),Schiff碱反应是4种改性方法中较优的方法

References

[1]  SIQUEIRA G,TAPIN-LINGUA S,BRAS J,et al.Morphological investigation of nanoparticles obtained from combined mechanical shearing,and enzymatic and acid hydrolysis of sisal fibers[J].Cellulose,2010,17(6):1147-1158.DOI:10.1007/s10570-010-9449-z.
[2]  KIM J,MONTERO G,HABIBI Y,et al.Dispersion of cellulose crystallites by nonionic surfactants in a hydrophobic polymer matrix[J].Polymer Engineering&Science,2009,49(10):2054-2061.DOI:10.1002/pen.21417.
[3]  HEUX L,CHAUVE G,BONINI C.Nonflocculating and chiral-nematic self-ordering of cellulose microcrystals suspensions in nonpolar solvents[J].Langmuir,2000,16(21):8210-8212.DOI:10.1021/la9913957.
[4]  CHEN J,LIN N,HUANG J,et al.Highly alkynylfunctionalization of cellulose nanocrystals and advanced nanocomposites thereof via click chemistry[J].Polym Chem,2015,6(24):4385-4395.DOI:10.1039/C5PY00367A.
[5]  BOUJEMAOUI A,MONGKHONTREERAT S,MALMSTROM E,et al.Preparation and characterization of functionalized cellulose nanocrystals[J].Carbohydr Polym,2015,115(4):457-464.DOI:10.1016/j.carbpol.2014.08.110.
[6]  BRAUN B,DORGAN J R,CHANDLER J P.Cellulosic nanowhiskers.Theory and application of light scattering from polydisperse spheroids in the RayleighGans-Debye regime[J].Biomacromolecules,2008,9(4):1255-1263.DOI:10.1021/bm7013137.
[7]  GARDEBJER S,BERGSTRAND A,IDSTR M A,et al.Solid-state NMR to quantify surface coverage and chain length of lactic acid modified cellulose nanocrystals,used as fillers in biodegradable composites[J].Composites Science and Technology,2015,107:1-9.DOI:10.1016/j.compscitech.2014.11.014.
[8]  YANG R,AUBRECHT K B,MA H,et al.Thiolmodified cellulose nanofibrous composite membranes for chromium(Ⅵ)and lead(Ⅱ)adsorption[J].Polymer,2014,55(5):1167-1176.DOI:10.1016/j.polymer.2014.01.043.
[9]  ODHIAMBO R,MUTHAKIA G,KAGWANJA S.Synthesis,characterization and electrochemistry of heterobimetallic complexes containing molybdenum(Ⅱ)nitrosyl and manganese(Ⅱ)-Schiff base centers[J].Bulletin of the Chemical Society of Ethiopia,2010,24(1):47-58.DOI:10.4314/bcse.v24i1.52960.
[10]  KUMARI S,CHAUHAN G S.New cellulose-lysine Schiff-base-based sensor-adsorbent for mercury ions[J].ACS Appl Mater Interfaces,2014,6(8):5908-5917.DOI:10.1021/am500820n.
[11]  LOKANATHAN A R,NYKANEN A,SEITSONEN J,et al.Cilia-mimetic hairy surfaces based on end-immobilized nanocellulose colloidal rods[J].Biomacromolecules,2013,14(8):2807-2813.DOI:10.1021/bm400633r.
[12]  YANG J,HAN C R,DUAN J F,et al.Studies on the properties and formation mechanism of flexible nanocomposite hydrogels from cellulose nanocrystals and poly(acrylic acid)[J].Journal of Materials Chemistry,2012,22(42):22467-22480.DOI:10.1039/C2JM35498E.
[13]  LIN N,DUFRESNE A.Surface chemistry,morphological analysis and properties of cellulose nanocrystals with gradiented sulfation degrees[J].Nanoscale,2014,6(10):5384-5393.DOI:10.1039/C3NR06761K.
[14]  HABIBI Y,LUCIA L A,ROJAS O J.Cellulose nanocrystals:Chemistry,self-assembly,and applications[J].Chemical Reviews,2010,110(6):3479-3500.DOI:10.1021/cr900339w.
[15]  BONDESON D,OKSMAN K.Dispersion and characteristics of surfactant modified cellulose whiskers nanocomposites[J].Composite Interfaces,2007,14(7-9):617-630.DOI:10.1163/156855407782106519.
[16]  PENG S X,CHANG H,KUMAR S,et al.A comparative guide to controlled hydrophobization of cellulose nanocrystals via surface esterification[J].Cellulose,2016,23(3):1825-1846.DOI:10.1007/s10570-016-0912-3.
[17]  YANG X,CRANSTON E D.Chemically cross-linked cellulose nanocrystal aerogels with shape recovery and superabsorbent properties[J].Chemistry of Materials,2014,26(20):6016-6025.DOI:10.1021/cm502873c.
[18]  BENDAHOU A,HAJLANE A,DUFRESNE A,et al.Esterification and amidation for grafting long aliphatic chains on to cellulose nanocrystals:A comparative study[J].Research on Chemical Intermediates,2014,41(7):4293-4310.DOI:10.1007/s11164-014-1530-z.
[19]  MARIANO M,EL KISSI N,DUFRESNE A.Cellulose nanocrystals and related nanocomposites:Review of some properties and challenges[J].Journal of Polymer Science Part B:Polymer Physics,2014,52(12):791-806.DOI:10.1002/polb.23490.
[20]  RANBY B.Cellulose and muscle-the colloidal properties of cellulose micelles[J].Discussions of the Faraday Society,1951(11):158-164.DOI:10.1039/DF9511100158.
[21]  LIN N,HUANG J,CHANG P R,et al.Surface acetylation of cellulose nanocrystal and its reinforcing function in poly(lactic acid)[J].Carbohydrate Polymers,2011,83(4):1834-1842.DOI:10.1016/j.carbpol.2010.10.047.
[22]  LIN N,DUFRESNE A.Physical and/or chemical compatibilization of extruded cellulose nanocrystal reinforced polystyrene nanocomposites[J].Macromolecules,2013,46(14):5570-5583.DOI:10.1021/ma4010154.
[23]  ZAMAN M,XIAO H,CHIBANTE F,et al.Synthesis and characterization of cationically modified nanocrystalline cellulose[J].Carbohydr Polym,2012,89(1):163-170.DOI:10.1016/j.carbpol.2012.02.066.
[24]  PELTZER M,PEI A,ZHOU Q,et al.Surface modification of cellulose nanocrystals by grafting with poly(lactic acid)[J].Polymer International,2014,63(6):1056-1062.DOI:10.1002/pi.4610.
[25]  HUANG J L,LI C J,GRAY D G.Functionalization of cellulose nanocrystal films via“thiol-ene”click reaction[J].RSC Advances,2014,4(14):6965-6969.DOI:10.1039/C3RA47041E.
[26]  LARSSON E,SANCHEZ C C,PORSCH C,et al.Thermo-responsive nanofibrillated cellulose by polyelectrolyte adsorption[J].European Polymer Journal,2013,49(9):2689-2696.DOI:10.1016/j.eurpolymj.2013.05.023.
[27]  CAMARERO ESPINOSA S,KUHNT T,FOSTER E J,et al.Isolation of thermally stable cellulose nanocrystals by phosphoric acid hydrolysis[J].Biomacromolecules,2013,14(4):1223-1230.DOI:10.1021/bm400219u.
[28]  SADEGHIFAR H,FILPPONEN I,CLARKE S P,et al.Production of cellulose nanocrystals using hydrobromic acid and click reactions on their surface[J].Journal of Materials Science,2011,46(22):7344-7355.DOI:10.1007/s10853-011-5696-0.
[29]  AZIZI SAMIR M A S,ALLOIN F,DUFRESNE A.Review of recent research into cellulosic whiskers,their properties and their application in nanocomposite field[J].Biomacromolecules,2005,6(2):612-626.DOI:10.1021/bm0493685.
[30]  HABIBI Y.Key advances in the chemical modification of nanocelluloses[J].Chem Soc Rev,2014,43(5):1519-1542.DOI:10.1039/C3CS60204D.
[31]  WANG H,HE J,ZHANG M,et al.A new pathway towards polymer modified cellulose nanocrystals via a“grafting onto”process for drug delivery[J].Polym Chem,2015,6(23):4206-4209.DOI:10.1039/C5PY00466G.
[32]  LIN N,HUANG J,CHANG P R,et al.Surface acetylation of cellulose nanocrystal and its reinforcing function in poly(lactic acid)[J].Carbohydrate Polymers,2011,83(4):1834-1842.DOI:10.1016/j.carbpol.2010.10.047.
[33]  MAN Z,MUHAMMAD N,SARWONO A,et al.Preparation of cellulose nanocrystals using an ionic liquid[J].Journal of Polymers and the Environment,2011,19(3):726-731.DOI:10.1007/s10924-011-0323-3.
[34]  DUFRESNE A.Processing of polymer nanocomposites reinforced with cellulose nanocrystals:A challenge[J].International Polymer Processing,2012,27(5):557-564.DOI:10.3139/217.2603.
[35]  HUANG J L,LI C J,GRAY D G.Cellulose nanocrystals incorporating fluorescent methylcoumarin groups[J].ACS Sustainable Chemistry&Engineering,2013,1(9):1160-1164.DOI:10.1021/sc400074e.

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