GNPs/PEG对聚乳酸材料结晶及力学性能的影响
|
摘要
采用超声辅助真空装置制备石墨烯纳米片(GNPs)/聚乙二醇(PEG)复配改性剂,通过熔融共混法制备了一系列聚乳酸(PLA)/GNPs、PLA/GNPs/PEG复合材料,利用扫描电子显微镜(SEM)、X-射线衍射仪(XRD)、差示扫描量热仪(DSC)、偏光显微镜(POM)和万能试验机对其断面形貌、结晶行为和力学性能进行研究。结果表明,添加复配改性剂GNPs/PEG后,PLA基复合材料的断面出现明显的PLA纤维,呈现韧性断裂; GNPs或GNPs/PEG的添加未改变PLA的晶型,当GNPs/PEG为0. 1%时,PLA基复合材料的结晶度达到38. 50%,比纯PLA提高了27. 99%; GNPs/PEG的添加也有效地改善了PLA的拉伸强度和缺口冲击强度,分别比纯PLA的提高了13. 32%和51. 9%。
Graphene nanoplatelets( GNPs)/polyethylene glycol( PEG) compounding modifiers were prepared by the ultrasonic oscillation with vacuum infusion device,a series of polylactic acid( PLA)/GNPs and PLA/GNPs/PEG composite were prepared by melt blending. The morphology,crystallization behavior and mechanical properties of PLA-based composite were studied by scanning electron microscopy( SEM),X-ray diffraction( XRD),differential scanning calorimeter( DSC),polarizing microscope( POM) and universal testing machine,respectively. Results indicated that the fracture surface of PLAbased composite appeared obvious fiber after addition of the GNPs/PEG modifier. The addition of GNPs and/or GNPs/PEG did not change the crystalline form of PLA. The crystallinity of PLA-based composite reached 38. 50% when the content of GNPs/PEG was 0. 1%,compared to pure PLA,which increased by 27. 99%. Additionally,with the addition of GNPs/PEG,the tensile strength and elongation at break of PLA increased by 13. 32% and 51. 9%,respectively.
Graphene nanoplatelets( GNPs)/polyethylene glycol( PEG) compounding modifiers were prepared by the ultrasonic oscillation with vacuum infusion device,a series of polylactic acid( PLA)/GNPs and PLA/GNPs/PEG composite were prepared by melt blending. The morphology,crystallization behavior and mechanical properties of PLA-based composite were studied by scanning electron microscopy( SEM),X-ray diffraction( XRD),differential scanning calorimeter( DSC),polarizing microscope( POM) and universal testing machine,respectively. Results indicated that the fracture surface of PLAbased composite appeared obvious fiber after addition of the GNPs/PEG modifier. The addition of GNPs and/or GNPs/PEG did not change the crystalline form of PLA. The crystallinity of PLA-based composite reached 38. 50% when the content of GNPs/PEG was 0. 1%,compared to pure PLA,which increased by 27. 99%. Additionally,with the addition of GNPs/PEG,the tensile strength and elongation at break of PLA increased by 13. 32% and 51. 9%,respectively.
引文
[1] ANDERSON J M,SHIVE M S. Biodegradation and biocompatibility of PLA and PLGA microspheres[J]. Advanced Drug Delivery Reviews,2012,64(s1):72-82.
[2] SCAFFARO R,LOPRESTI F,BOTTA L,et al. Preparation of threelayered porous PLA/PEG scaffold:relationship between morphology,mechanical behavior and cell permeability[J]. Journal of the Mechanical Behavior of Biomedical Materials,2016,54:8-17.
[3]王劭妤,石坚,郑来云.碳纳米管/PLA复合材料制备及性能[J].复合材料学报,2012,29(6):50-54.
[4] DOGAN S K,REYES E A,RASTOGI S,et al. Reactive compatibilization of PLA/TPU blends with a diisocyanate[J/OL]. Journal of Applied Polymer Science,2014,131(10)[2013-12-18]. https://doi. org/10. 1002/app. 40251.
[5] HOMKLIN R,HONGSRIPHAN N. Mechanical and thermal properties of PLA/PBS co-continuous blends adding nucleating agent[J].Energy Procedia,2013,34:871-879.
[6]李杨,周琴,孙鑫,等.石墨烯/聚乳酸复合材料的研究进展[J].塑料工业,2017,45(9):9-11.
[7]李俊起,朱爱臣,马丽霞,等.聚乳酸在3D打印医疗器械产品中的研究进展[J].生物医学工程研究,2016,35(4):309-312.
[8]白琼琼,文美莲,李增俊,等.聚乳酸纤维的国内外研发现状及发展方向[J].毛纺科技,2017,45(2):64-68.
[9]许民,毕永豹,宋永明.杨木木粉/聚乳酸复合材料的制备及其在3D打印上的应用[J].科技导报,2016,34(19):132-137.
[10]吕培,马丕明,东为富,等.聚乳酸改性及其在包装材料中的应用[J].塑料包装,2017,27(3):24-33.
[11]王明强,熊鑫,范倩,等.生物医用聚乳酸材料的改性研究进展[J].化工新型材料,2017,45(6):34-36.
[12]葛正浩,魏悦涵,司丹鸽,等. PLA/PBS/秸秆粉可生物降解木塑复合材料制备及性能[J].塑料,2017,46(3):18-22.
[13]贾仕奎,王忠,朱艳,等.改性云母对PLA/TPU共混物结晶和热性能的影响[J].塑料,2017,46(5):103-106.
[14]颜克福,何继敏,李珊珊,等.聚乙二醇/滑石粉共混改性聚乳酸及吹塑薄膜性能的研究[J].塑料工业,2015,43(5):98-101.
[15] LIU C,YE S,FENG J. Promoting the dispersion of graphene and crystallization of poly(lactic acid)with a freezing-dried graphene/PEG masterbatch[J]. Composites Science and Technology,2017,144:215-222.
[16] LI D,MLLER M B,GILJE S,et al. Processable aqueous dispersions of graphene nanosheets[J]. Nature Nanotechnology,2008,3(2):101-105.
[17] GEIM A K. Graphene:status and prospects[J]. Science,2009,324(5934):1530-1534.
[18]甄卫军,王文涛,李进.聚乳酸/氧化石墨烯纳米复合材料的结构与性能[J].高分子材料科学工程,2015,31(4):152-157.
[19] REN Q,WANG J,ZHAI W,et al. Fundamental influences of induced crystallization and phase separation on the foaming behavior of PLA/PEG blends blown with compressed CO2[J]. Industrial&Engineering Chemistry Research,2016,55(49):12557-12568.
[20] KODAL M,SIRIN H,OZKOC G. Non-Isothermal crystallization kinetics of PEG plasticized PLA/G-POSS nanocomposites[J].Polymer Composites,2017,38(7):1378-1389.
[21] TONCHEVA A,MINCHEVA R,KANCHEVA M,et al. Antibacterial PLA/PEG electrospun fibers:comparative study between grafting and blending PEG[J]. European Polymer Journal,2016,75:223-233.
[22]贾仕奎,王忠,陈立贵,等.高定形聚乙二醇/剑麻纤维素/膨胀石墨相变储能材料的研制及热性能[J].高分子材料科学与工程,2017,33(1):137-141.
[23] JIA S,YU D,ZHU Y,et al. Morphology,crystallization and thermal behaviors of PLA-based composites:wonderful effects of hybrid GO/PEG via dynamic impregnating[J]. Polymers,2017,9(10):528.
[2] SCAFFARO R,LOPRESTI F,BOTTA L,et al. Preparation of threelayered porous PLA/PEG scaffold:relationship between morphology,mechanical behavior and cell permeability[J]. Journal of the Mechanical Behavior of Biomedical Materials,2016,54:8-17.
[3]王劭妤,石坚,郑来云.碳纳米管/PLA复合材料制备及性能[J].复合材料学报,2012,29(6):50-54.
[4] DOGAN S K,REYES E A,RASTOGI S,et al. Reactive compatibilization of PLA/TPU blends with a diisocyanate[J/OL]. Journal of Applied Polymer Science,2014,131(10)[2013-12-18]. https://doi. org/10. 1002/app. 40251.
[5] HOMKLIN R,HONGSRIPHAN N. Mechanical and thermal properties of PLA/PBS co-continuous blends adding nucleating agent[J].Energy Procedia,2013,34:871-879.
[6]李杨,周琴,孙鑫,等.石墨烯/聚乳酸复合材料的研究进展[J].塑料工业,2017,45(9):9-11.
[7]李俊起,朱爱臣,马丽霞,等.聚乳酸在3D打印医疗器械产品中的研究进展[J].生物医学工程研究,2016,35(4):309-312.
[8]白琼琼,文美莲,李增俊,等.聚乳酸纤维的国内外研发现状及发展方向[J].毛纺科技,2017,45(2):64-68.
[9]许民,毕永豹,宋永明.杨木木粉/聚乳酸复合材料的制备及其在3D打印上的应用[J].科技导报,2016,34(19):132-137.
[10]吕培,马丕明,东为富,等.聚乳酸改性及其在包装材料中的应用[J].塑料包装,2017,27(3):24-33.
[11]王明强,熊鑫,范倩,等.生物医用聚乳酸材料的改性研究进展[J].化工新型材料,2017,45(6):34-36.
[12]葛正浩,魏悦涵,司丹鸽,等. PLA/PBS/秸秆粉可生物降解木塑复合材料制备及性能[J].塑料,2017,46(3):18-22.
[13]贾仕奎,王忠,朱艳,等.改性云母对PLA/TPU共混物结晶和热性能的影响[J].塑料,2017,46(5):103-106.
[14]颜克福,何继敏,李珊珊,等.聚乙二醇/滑石粉共混改性聚乳酸及吹塑薄膜性能的研究[J].塑料工业,2015,43(5):98-101.
[15] LIU C,YE S,FENG J. Promoting the dispersion of graphene and crystallization of poly(lactic acid)with a freezing-dried graphene/PEG masterbatch[J]. Composites Science and Technology,2017,144:215-222.
[16] LI D,MLLER M B,GILJE S,et al. Processable aqueous dispersions of graphene nanosheets[J]. Nature Nanotechnology,2008,3(2):101-105.
[17] GEIM A K. Graphene:status and prospects[J]. Science,2009,324(5934):1530-1534.
[18]甄卫军,王文涛,李进.聚乳酸/氧化石墨烯纳米复合材料的结构与性能[J].高分子材料科学工程,2015,31(4):152-157.
[19] REN Q,WANG J,ZHAI W,et al. Fundamental influences of induced crystallization and phase separation on the foaming behavior of PLA/PEG blends blown with compressed CO2[J]. Industrial&Engineering Chemistry Research,2016,55(49):12557-12568.
[20] KODAL M,SIRIN H,OZKOC G. Non-Isothermal crystallization kinetics of PEG plasticized PLA/G-POSS nanocomposites[J].Polymer Composites,2017,38(7):1378-1389.
[21] TONCHEVA A,MINCHEVA R,KANCHEVA M,et al. Antibacterial PLA/PEG electrospun fibers:comparative study between grafting and blending PEG[J]. European Polymer Journal,2016,75:223-233.
[22]贾仕奎,王忠,陈立贵,等.高定形聚乙二醇/剑麻纤维素/膨胀石墨相变储能材料的研制及热性能[J].高分子材料科学与工程,2017,33(1):137-141.
[23] JIA S,YU D,ZHU Y,et al. Morphology,crystallization and thermal behaviors of PLA-based composites:wonderful effects of hybrid GO/PEG via dynamic impregnating[J]. Polymers,2017,9(10):528.