基于MIS改性的WPU/GO纳米复合乳液的研究
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摘要
以2-氨基-4-羟基-6-甲基嘧啶(MIS)为改性剂,通过1-乙基-(3-二甲基氨基丙基)碳二亚胺盐酸盐(EDC·HCL)活化羧基制得MIS改性氧化石墨烯(MGO)分散液;并在水性聚氨酯乳化过程中引入MGO分散液制备水性聚氨酯/MIS改性氧化石墨烯(WPU/MGO)纳米复合乳液。通过红外光谱、热重分析、纳米粒度分析、扫描电子显微镜和力学分析对MGO,复合乳液和复合膜的结构与性能进行了表征。结果表明,当MGO的添加量为1%时,MGO在水性聚氨酯中均匀分散,纳米复合膜的杨氏模量、拉伸强度、断裂伸长率和热稳定性均有明显提高。
Taking 2-Amino-4-hydroxy-6-methylpyrimidine( MIS) as modifier, the MIS modified graphene oxide( MGO) dispersion liquid was prepared by 1-ethyl-( 3-dimethyl aminopropyl) carbodiimine hydrochloride( EDC · HCL) activation of carboxyl. The MIS modified graphene oxide( MGO) was introduced into the emulsifying process of waterborne polyurethane to prepare the waterborne polyurethane/MIS modified graphene oxide( WPU/MGO) nanocomposite emulsion. The structure and properties of MGO,composite emulsion and composite film were characterized by fourier transform infrared spectroscopy( FITR),thermogravimetric analysis( TGA), particle size analyzer, scanning electron microscope( SEM) and mechanical test. The results show when the addition of MGO is 1%,it could be dispersed in the waterborne polyurethane uniformly and Young modulus,tensile strength,elongation at break and thermal properties of the nanocomposite film are significantly increased.
Taking 2-Amino-4-hydroxy-6-methylpyrimidine( MIS) as modifier, the MIS modified graphene oxide( MGO) dispersion liquid was prepared by 1-ethyl-( 3-dimethyl aminopropyl) carbodiimine hydrochloride( EDC · HCL) activation of carboxyl. The MIS modified graphene oxide( MGO) was introduced into the emulsifying process of waterborne polyurethane to prepare the waterborne polyurethane/MIS modified graphene oxide( WPU/MGO) nanocomposite emulsion. The structure and properties of MGO,composite emulsion and composite film were characterized by fourier transform infrared spectroscopy( FITR),thermogravimetric analysis( TGA), particle size analyzer, scanning electron microscope( SEM) and mechanical test. The results show when the addition of MGO is 1%,it could be dispersed in the waterborne polyurethane uniformly and Young modulus,tensile strength,elongation at break and thermal properties of the nanocomposite film are significantly increased.
引文
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[2]KANG S Y,JI Z,TSENG L F,et al.Design and synthesis of waterborne polyurethanes[J].Adv Mater,2018:1706237.
[3]陈子栋,张胜文,郭盟,等.聚硅氧烷与纳米Si O2复合改性光固化水性聚氨酯的制备与性能[J].功能高分子学报,2014,27(2):178-183,218.
[4]KIM B K,SEO J W,JEONG H M.Morphology and properties of waterborne polyurethane/clay nanocomposites[J].Eur Polym J,2003,39(1):85-91.
[5]陈涛,李晓萱,伍胜利.水性聚氨酯-石墨烯纳米复合材料的等温结晶动力学[J].功能高分子学报,2015,28(3):313-318.
[6]ISABEL F,LORENA U,FILOMENA B,et al.Waterborne polyurethane-urea dispersion with chain extension step in homogeneous medium reinforced with cellulose nanocrystals[J].Composites Part B,2018,137:31-38.
[7]LEE H T,LIN L H.Waterborne polyurethane/clay nanocomposites:Novel effects of the clay and its interlayer ions on the morphology and physical and electrical properties[J].Macromolecules,2006,39(18):6133-6141.
[8]LIAO L,LI X,WANG Y,et al.Effects of surface structure and morphology of nanoclays on the properties of jatrophacurcas oil base waterborne polyurethane/clay nanocomposites[J].Industrial Eng Chem Res,2016,55(45):11689-11699.
[9]SARDON H,IRUSTA L,AGUIRRESAROBE R H,et al.Polymer/silica nanohybrids by means of tetraethoxysilane solgel condensation onto waterborne polyurethane particles[J].Prog Org Coat,2014,77(9):1436-1442.
[10]SUN D X,MIAO X,ZHANG K J,et al.Triazole-forming waterborne polyurethane composites fabricated with silane coupling agent functionalized nano-silica[J].J Colloid Interface Sci,2011,361(2):483-490.
[11]WU Z F,WANG H,XUE M,et al.Preparation of carbon nanotubes/waterborne polyurethane composites with the emulsion particles assisted dispersion of carbon nanotubes[J].Compos Sci Technol,2015,114:50-56.
[12]ZENG Z H,CHEN M J,JIN H,et al.Thin and flexible multi-walled carbon nanotube/waterborne polyurethane composites with high-performance electromagnetic interference shielding[J].Carbon,2016,96:768-777.
[13]NGUYEN T T,BANDYOPADHYAY P,LI X,et al.Effects of grafting methods for functionalization of graphene oxide by dodecylamine on the physical properties of its polyurethane nanocomposites[J].J Membr Sci,2017,540:108-119.
[14]KRL P,KRL B,PIELICHOWSKA K,et al.Composites prepared from the waterborne polyurethane cationomers-modified graphene.Part I.Synthesis,structure,and physicochemical properties[J].Colloid Polym Sci,2015,293(2):421-431.
[15]LI D,MULLER M B,GILJE S,et al.Processable aqueous dispersions of graphene nanosheets[J].Nature Nanotechnol,2008,3(2):101-105.
[16]SINGH V,JOUNG D,ZHAI L,et al.Graphene based materials:Past,present and future[J].Prog Mater Sci,2011,56(8):1178-1271.
[17]赵昭,马兴元,张铭芮,等.功能化石墨烯和有机硅双重改性水性聚氨酯的结构与性能研究[J].现代化工,2018,38(10):99-103.
[18]冯见艳,王学川.环氧改性氧化石墨烯/水性聚氨酯复合膜的制备及其增强作用[J].精细化工,2018,35(10):1653-1658.
[19]张玉,杨建军,吴庆云,等.硅烷化还原氧化石墨烯/水性聚氨酯复合物的合成与性能[J].精细化工,2016,33(3):241-246.
[20]FOLMER B J B,SIJBESMA R P,VERSTEEGEN R M,et al.Supramolecular polymer materials:Chain extension of telechelic polymers using a reactive hydrogen-bonding synthon[J].Adv Mater,2000,12(12):874-878.
[21]唐黎明,王宇,邱义鹏,等.以四重氢键结合的超支化聚合物及其涂层材料[J].高分子学报,2009(1):93-96.
[22]COMPTON O C,DIKIN D A,PUTZ K W,et al.Electrically conductive“Alkylated”graphene paper via chemical reduction of amine-functionalized graphene oxide paper[J].Adv Mater,2010,22(8):892-896.