为提升热致型复合纤维的力学性能,以聚对苯二甲酸乙二醇酯(PETG)和改性聚酰胺粉(记作PA6)为原料,采用熔融共混法和熔融纺丝技术分别制备了具有形状记忆功能的热致型PETG/PA6聚合物和热致型PETG/PA6复合纤维。通过差示扫描量热仪、热重分析仪、傅里叶变换红外光谱仪、单纤维强力机对复合纤维的热性能、热稳定性、官能团及力学性能进行分析和测试,研究了PA6含量对复合纤维结构和性能的影响。结果表明:PA6质量分数为10%时,热致型PETG/PA6复合纤维力学性能较好,抗拉强度为69.5MPa,相较于纯PETG纤维抗拉强度提高了44.1%;热致型复合纤维的形状记忆固定率和形状记忆回复率分别为91.7%和88.9%,具有良好的形状记忆功能。
To enhance the mechanical properties of thermally induced composite fibers,polyethylene terephthalate (PETG) and modified polyamide powder (PA6) were used as raw materials to prepare thermally induced PETG/PA6 polymers and thermally induced PETG/PA6 composite fibers with shape memory function by melt blending and melt spinning.The thermal performance,thermal stability,functional groups,and mechanical properties of the composite fibers were analyzed and tested using differential scanning calorimetry,thermogravimetric analysis,Fourier transform infrared spectroscopy,and single-fiber tensile strength testing.The study investigated the effect of PA6 content on the structure and performance of thermally induced shape memory composite fibers.The results showed that when the mass fraction of PA6 was 10%,the mechanical properties of the thermally induced PETG/PA6 composite fibers were better,with a tensile strength of 69.5MPa,which increased by 44.1% compared to pure PETG fibers.The shape fixation rate and shape recovery rate of the thermally induced composite fibers were 91.7% and 88.9%,respectively,indicating excellent shape memory performance.
[1] 朱光明,魏堃,王坤,等.形状记忆聚合物及其在航空航天领域中的应用[J].高分子材料科学与工程,2010,26(8):169-171.
[2] Qi X D,Shao Y W,Wu H Y,et al.Flexible phase change composite materials with simultaneous light energy storage and lightactuated shape memory capability[J].Composites Science and Technology,2019,181:107714.
[3] Gong X,Liu L,Fabrizio Scarpa,et al.Variable stiffness corrugated composite structure with shape memory polymer for morphing skin applications[J].Smart Materials and Structures,2017,26(3):35052.
[4] Liu Y,Du H,Liu L W,et al.Shape memory polymers and their composites in aerospace applications:a review[J].Smart Materials and Structures,2014,23(2):23001.
[5] 郑威,王亚立,张风华,等.形状记忆聚合物微纳米纤维膜在生物医学中的应用进展[J].中国科学:技术科学,2018,48(8):811-826.
[6] Liu X,Chang M,He B,et al.A one-pot strategy for preparation of high-strength carboxymethyl xylan-g-poly(acrylic acid) hydrogels with shape memory property[J].J Colloid Interface Sci,2019,538:507-518.
[7] Wang J,Luo J,Liu Y,et al.Development of shape memory polymer nanocomposite foam for treatment of intracranial aneurysms[J].Materials Letters,2019,250:38-41.
[8] 任正鹤,何圳,陈少军,等.形状记忆聚合物在4D打印技术中的应用进展[J].高分子材料科学与工程,2023,39(11):182-190.
[9] 张静,刘秀军,王瑞晨,等.聚酯丙烯酸酯／环氧丙烯酸酯4D打印形状记忆聚合物的研究[J].功能材料,2022,10(53):10157-10161.
[10] 王林林,冷劲松,杜善义,等.4D打印形状记忆聚合物及其复合材料的研究现状和应用进展[J].哈尔滨工业大学学报,2020,52(6):227-244.
[11] 胡金莲,金关秀,吕静,等.温敏形状记忆织物的开发及其起拱回复性研究[J].棉纺织技术,2010,38(7):409-411.
[12] 张静.形状记忆聚合物及其在智能纺织品中的应用[J].上海纺织科技,2004,32(2):1-5.
[13] 胡金莲,刘晓霞.纺织用形状记忆聚合物研究进展[J].纺织学报,2006,27(1):114-120.
[14] Cao S,Tong X,Dai K,et al.A super-stretchable and tough functionalized boron nitride/PEDOT∶PSS/poly hydrogel with self-healing,adhesion,conducive and photothermal activity[J].Journal of Material Chemistry A,2019,7:8204-209.
[15] 罗红林,盛京,沈宁祥,等.改性PET的合成与表征[J].天津化工,2001(1):4-6.
[16] 行春丽,成战胜.啤酒瓶用共缩聚PET/PEN的研究[J].塑料工业,2005,33(6):67-69.
[17] 贾宏涛,赵蕴慧,盛京,等.PET-PTMG聚醚酯的合成与表征[J].化学工业与工程,2003,20(3):139-149.
[18] 吴唯,刘国松,钱琦,等.PET/PEN共混聚酯的结晶和热稳定性能研究[J].中国塑料,2003,17(6):43-47.
[19] 刘伯林,金志成,武荣瑞,等.PET/ECDP/PEG共混改性聚酯纤维的研究[J].合成纤维,2002,31(4):7-11.
[20] 周俊峰,王小娟,王振峰,等.PET/EN-MFMB共混体系力学性能的研究[J].塑料工业,2005,33(6):23-27.
[21] 张闯,张静,王娜,等.聚多巴胺改性纳米二氧化硅增强反式-1,4-聚异戊二烯形状记忆聚合物的制备与性能[J].复合材料学报,2023,40(5):2772-2782.
[22] Wang E,Dong Y,Yu L,et al.Technology,effect of graphene oxide-carbon nanotube hybrid filler on themechanical property and thermal response speed of shapememory epoxy composites[J].Composites Science and Technology,2019,169(5):209-216.
[23] Liu Y,Guo Y,Zhao J,et al.Technology,carbon fiber rein-forced shape memory epoxy composites with superior mechanical performances[J].Composites Science and Technology,2019,177(16):49-56.
[24] Wei J,Wang X,Lu H,et al.Molecular dynamics simulations of thermodynamics and shape memory effect in CNT epoxy nanocomposites[J].Composites Science and Technology,2021,211(4):108849.
基金资助
西安市科技计划项目(2023GXFW0021);中国纺织工业联合会科技指导性计划项目(2021006);陕西省技术创新引导计划(2024QCY—KXJ—021);陕西省科技厅三项改革项目(2024ZC—YYDP—17);中国纺织工业联合会科技指导性项目(2024030)
PDF
