改性芳纶纤维增强木粉/高密度聚乙烯复合材料的力学性能
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摘要
采用螺杆挤出机研究了添加连续芳纶纤维增强木粉/高密度聚乙烯(CAF-WF/HDPE)复合材料,为改善CAF与WF/HDPE复合材料界面相容性,分别采用磷酸和硅烷偶联剂处理纤维。对比表面处理前后的CAF形态分析显示,经过处理的CAF表面粗糙度增加;采用磷酸和硅烷偶联剂处理,纤维束从基体中的拔出强度分别提高了94.9%和77.6%,表明处理后的CAF与WF/HDPE复合材料的界面结合强度有所提高。对比WF/HDPE复合材料,在挤出成型过程中加入未处理CAF,CAF-WF/HDPE复合材料拉伸强度、弯曲强度和冲击强度分别提高了32.1%、35.1%、515.1%;CAF采用硅烷偶联剂处理后,CAF-WF/HDPE复合材料对应的力学性能分别提高了42.0%、37.4%、550.2%。动态力学分析表明:表面处理后CAF与WF/HDPE复合材料的界面相容性得到改善。
The continuous aramid fiber(CAF)was added to wood flour/high density polyethylene(WF/HDPE)composites by screw extruder.Surface treatment of CAF with phosphoric acid and silane coupling agent was used to improve the interfacial compatibility between CAF and the WF/HDPE composites.The morphological analysis showed that the surface roughness of CAF increased after the surface treatment.Either the treatment of CAF with phosphoric acid or silane coupling agent,the pull-out strength of CAF bundle increases up to 94.9% and 77.6%,respectively.It shows that the interfacial bonding strength of the treated CAF and the WF/HDPE composites is enhanced.Compared with WF/HDPE composite without CAF,the composite with the untreated CAF results in that the tensile strength,flexural strength and impact strength of CAF-WF/HDPE composite increases by 32.1%,35.1% and 515.1%,respectively.After CAF treated with silane coupling agent,the mechanical properties of CAFWF/HDPE composite increase by 42.0%,37.4% and 550.2%.The dynamic mechanical analysis shows that the interfacial compatibility of the CAF and WF/HDPE composite is improved after surface treatment.
The continuous aramid fiber(CAF)was added to wood flour/high density polyethylene(WF/HDPE)composites by screw extruder.Surface treatment of CAF with phosphoric acid and silane coupling agent was used to improve the interfacial compatibility between CAF and the WF/HDPE composites.The morphological analysis showed that the surface roughness of CAF increased after the surface treatment.Either the treatment of CAF with phosphoric acid or silane coupling agent,the pull-out strength of CAF bundle increases up to 94.9% and 77.6%,respectively.It shows that the interfacial bonding strength of the treated CAF and the WF/HDPE composites is enhanced.Compared with WF/HDPE composite without CAF,the composite with the untreated CAF results in that the tensile strength,flexural strength and impact strength of CAF-WF/HDPE composite increases by 32.1%,35.1% and 515.1%,respectively.After CAF treated with silane coupling agent,the mechanical properties of CAFWF/HDPE composite increase by 42.0%,37.4% and 550.2%.The dynamic mechanical analysis shows that the interfacial compatibility of the CAF and WF/HDPE composite is improved after surface treatment.
引文
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[30]朱礼智.木粉/聚丙烯复合界面分子运动弛豫过程解析[D].北京:北京林业大学,2013.ZHU L Z.Analyses of the relaxation processes of molecular movement on wood flour/polypropylene composite interface[D].Beijing:Beijing Forestry University,2013(in Chinese).
[31]李东方.聚乙烯木塑复合材料性能影响因子与界面特性研究[D].北京:北京林业大学,2013.LI D F.Study on performance influence factors and interfacial characteristic of PE wood plastic composites[D].Beijing:Beijing Forestry University,2013(in Chinese).
[2]王海刚,张京发,王伟宏,等.纤维增强木塑复合材料研究进展[J].林业科学,2016,52(6):130-139.WANG H G,ZHANG J F,WANG W H,et al.Research of fiber reinforced wood-plastic composites:A review[J].Scientia Silvae Sinicae,2016,52(6):130-139(in Chinese).
[3]崔益华,BAHMAN N,STEPHEN L,等.玻璃纤维/木塑混杂复合材料及其协同增强效应[J].高分子材料科学与工程,2006,22(3):231-234.CUI Y H,BAHMAN N,STEPHEN L,et al.Glass fiber/wood plastic hybrid composites and their synergistic reinforcing effects[J].Polymer Materials Science&Engineering,2006,22(3):231-234(in Chinese).
[4]ZHOU Z,XU M,YANG Z,et al.Effect of maleic anhydride grafted polyethylene on the properties of chopped carbon fiber/wood plastic composites[J].Journal of Reinforced Plastics&Composites,2014,33(13):1216-1225.
[5]ZHANG S H,HE G Q,LIANG G Z,et al.Comparison of F-12aramid fiber with domestic armid fiberⅢon surface feature[J].Applied Surface Science,2010,256(7):2104-2109.
[6]欧荣贤,赵辉,王清文,等.Kevlar纤维-木粉/HDPE混杂复合材料的制备与性能[J].高分子材料科学与工程,2010,26(10):144-147+151.OU R X,ZHAO H,WANG Q W,et al.Preparation and properties of Kevlar fiber-wood flour/HDPE hybrid composites[J].Polymer Materials Science&Engineering,2010,26(10):144-147+151(in Chinese).
[7]OU R,ZHAO H,SUI S,et al.Reinforcing effects of Kevlar fiber on the mechanical properties of wood-flour/high-densitypolyethylene composites[J].Composites Part A:Applied Science and Manufacturing,2010,41(9):1272-1278.
[8]LU Z,HU W,XIE F,et al.Argon low-temperature plasma modification of chopped aramid fiber and its effect on paper performance of aramid sheets[J].Journal of Applied Polymer Science,2017,134(34):45215.
[9]XING L,LIU L,HUANG Y,et al.Enhanced interfacial properties of domestic aramid fiber-12via high energy gamma ray irradiation[J].Composites Part B:Engineering,2015,69:50-57.
[10]厉世能.芳纶纤维的老化及表面处理的研究[D].苏州:苏州大学,2012.LI S N.Research on ageing and surface modification of aramid fibers[D].Suzhou:Soochow University,2012(in Chinese).
[11]LIU T M,ZHENG Y S,HU J.Retracted article:Surface modification of aramid fibers with novel chemical approach[J].Polymer Bulletin,2011,66(2):259-275.
[12]CAO K,SIEPERMANN C P,YANG M,et al.Reactive aramid nanostructures as high-performance polymeric building blocks for advanced composites[J].Advanced Functional Materials,2013,23(16):2072-2080.
[13]SA R,YAN Y,WEI Z,et al.Surface modification of aramid fibers by bio-inspired poly(dopamine)and epoxy functionalized silane grafting[J].ACS Applied Materials&Interfaces,2014,6(23):21730.
[14]凌新龙,郭立富,林海涛.芳纶纤维的改性研究新进展[J].天津工业大学学报,2016,35(4):10-27.LING X L,GUO L F,LIN H T.New research progress in modification of aramid fibers[J].Journal of Tianjin Polytechnic University,2016,35(4):10-27(in Chinese).
[15]CHENG Z,LI B,HUANG J,et al.Covalent modification of aramid fibers’surface via direct fluorination to enhance composite interfacial properties[J].Materials&Design,2016,106:216-225.
[16]TIAN Y,ZHANG H,ZHANG Z.Influence of nanoparticles on the interfacial properties of fiber-reinforced-epoxy composites[J].Composites Part A:Applied Science and Manufacturing,2017,98:1-8.
[17]DENG T,ZHANG G,DAI F,et al.Mild surface modification of para-aramid fiber by dilute sulfuric acid under microwave irradiation[J].Textile Research Journal,2016,87(7):799-806.
[18]ZOLFAGHARI A,BEHRAVESH A H,ADLI A,et al.Continuous glass fiber reinforced wood plastic composite in extrusion process:Feasibility and processing[J].Journal of Reinforced Plastics and Composites,2012,32(1):52-60.
[19]方立.连续纤维增强热塑性复合材料制备及其性能的研究[D].上海:华东理工大学,2012.FANG L.Study om preparation and characters of continuous fiber reinforced thermoplastic composites[D].Shanghai:East China University of Science and Technology,2012(in Chinese).
[20]董庆亮.多巴胺改性芳纶纤维及其复合材料界面性能研究[D].哈尔滨:哈尔滨工业大学,2014.DONG Q L.Study on dopamine-modified aramid fiber and the interfacial properties of the composites[D].Harbin:Harbin Institute of Technology,2014(in Chinese).
[21]WANG L,SHI Y,SA R,et al.Surface modification of aramid fibers by catechol/polyamine codeposition followed by silane grafting for enhanced interfacial adhesion to rubber matrix[J].Industrial&Engineering Chemistry Research,2016,55(49):12547-12556.
[22]American Society for Testing and Materials International.Standard test method for tensile properties of plastics:ASTMD638-03[S].West Conshohocken:ASTM International,2003.
[23]American Society for Testing and Materials International.Standard test method for flexural properties of unreinforced and reinforced plastics and electrical insulating materials:ASTM D790-03[S].West Conshohocken:ASTM International,2003.
[24]中国国家标准化管理委员会.塑料悬臂梁冲击强度的测定:GB/T 1843-2008[S].北京:中国标准出版社,2008.Standardization Administration of the People’s Republic of China.Plastics:Determination of izod impact strength:GB/T 1843-2008[S].Beijing:China Standards Press,2008(in Chinese).
[25]ZHAO J.Effect of surface treatment on the structure and properties of para-aramid fibers by phosphoric acid[J].Fibers and Polymers,2013,14(1):59-64.
[26]LU X H,LIU C,TIAN J,et al.Study of applying aramid fiber treated insurface to EPDM rubber composite materials[J].Applied Mechanics and Materials,2013,446-447:18-21.
[27]XIE Y,HILL C A S,XIAO Z,et al.Silane coupling agents used for natural fiber/polymer composites:A review[J].Composites Part A:Applied Science and Manufacturing,2010,41(7):806-819.
[28]唐欣磊,谭洪生,谭浩,等.长芳纶纤维增强抗冲共聚聚丙烯复合材料的研究[J].工程塑料应用,2013,41(2):5-9.TANG X L,TAN H S,TAN H,et al.Long aramid fiber reinforced impact polypropylene copolymer composites[J].Engineering Plastics Application,2013,41(2):5-9(in Chinese).
[29]郝建秀,杜凤,王伟宏.短切碳纤维表面处理对木粉/HDPE复合材料性能的影响[J].复合材料学报,2018,35(2):298-303.HAO J X,DU F,WANG W H.Surface treatment of short carbon fibers for improving the properties of wood flour/high density polyethylene composite[J].Acta Materiae Compositae Sinica,2018,35(2):298-303(in Chinese).
[30]朱礼智.木粉/聚丙烯复合界面分子运动弛豫过程解析[D].北京:北京林业大学,2013.ZHU L Z.Analyses of the relaxation processes of molecular movement on wood flour/polypropylene composite interface[D].Beijing:Beijing Forestry University,2013(in Chinese).
[31]李东方.聚乙烯木塑复合材料性能影响因子与界面特性研究[D].北京:北京林业大学,2013.LI D F.Study on performance influence factors and interfacial characteristic of PE wood plastic composites[D].Beijing:Beijing Forestry University,2013(in Chinese).
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