采用聚碳酸酯二醇(PCDL1000)与异佛尔酮二异氰酸酯(IPDI)制备水性聚氨酯乳液,球磨分散氧化螺旋炭黑,制备形状记忆聚氨酯,表征并测试其形貌特征、热学、电学、力学及形状记忆性能。结果表明:填充炭黑与聚氨酯链段存在氢键作用;炭黑填充不改变薄膜的晶型结构和表面亲疏水性,但热稳定性和导电性均有增强;炭黑最佳填充量为0.8%,在实验范围内,薄膜内炭黑含量增加,玻璃化转变温度升高约9℃,拉伸强度减小约14MPa、断裂伸长率增大到523.2%,但炭黑含量过多则发生团聚。填充薄膜的形状固定率约99%,形状回复率约70%,有良好的形状记忆性能。
polycarbonate glycol (PCDL1000) and isophorone diisocyanate (IPDI) were adopted to prepare waterborne polyurethane emulsion,which was filled with oxidation-modified helical carbon black (MH) through the ball-milling dispersion.Waterborne polyurethane films (WPU) with shape memory were obtained,and their properties were then characterized and tested,including morphological structure,thermal,electrical,mechanical,and shape memory properties.The results showed that hydrogen binding interactions existed between MH surfaces and WPU chains.MH filling didn't change the crystalline structure and surface hydrophobicity of WPU films,while their thermal stability and conductivity properties were slightly enhanced.The optimal filling amount of MH was 0.8wt.%.Within a certain range,the glass transition temperature increased by 9℃ with the increase of MH,the tensile strength decreased by 14MPa,and the elongation at break increased to 523.2%.However,excessive MH filling caused the agglomeration within WPU films.The shape fixing rate of the MH-filled WPU films was about 99%,and the shape recovery rate was about 70%,with good shape memory performance.
[1] Lu H X,Wang G Y,Chun-Pu H U.Study on shape memory waterborne polyurethaneurea/SiO2 nano-composite[J].China Plastics Industry,2008,36:14-18.
[2] 任文惠,夏宇凡,孙一新,等.形状记忆聚氨酯丙烯酸酯的制备及性能[J].高分子材料科学与过程,2019,35(12):8-15.
[3] Gunes I S,Jimenez G A,Jana S C.Carbonaceous fillers for shape memory actuation of polyurethane composites by resistive heating[J].Carbon,2009,47:981-997.
[4] 宋莹,李琳,陈建.改性炭黑填充形状记忆水性聚氨酯材料的制备及性能[J].炭素技术,2023,42(4):9-13,38.
[5] Wang W,Liu Y,Leng J.Recent developments in shape memory polymer nano-composites:actuation methods and mechanisms[J].Coordination Chemistry Reviews,2016,320:38-52.
[6] Raghubanshi H,Dikio E D,Naidoo E B.The properties and applications of helical carbon fibers and related materials:a review[J].Journal of Industrial and Engineering Chemistry,2016,44:23-42.
[7] Yoshimura K,Nakano K,Miyake T,et al.Effectiveness of carbon microcoils as a reinforcing material for a polymer matrix[J].Carbon,2006,44:2833-2838.
[8] Jin Y,Chen J,Fu Q,et al.Low-temperature synthesis and characterization of helical carbon fibers by one-step chemical vapour deposition[J].Applied Surface Science,2015,324:438-442.
[9] Liu X,Yang Q S,Liew K M,et al.Superstretchability and stability of helical structures of carbon nanotube/polymer composite fibers:coarse-grained molecular dynamics modeling and simulation[J].Carbon,2017,115:220-228.
[10] Motojima S,Chen X,Yang S,et al.Properties and potential applications of carbon microcoils/nanocoils[J].Diamond & Related Materials,2004,13:1989-1992.
[11] 罗少伶,陈建,代祖洋,等.SiO2-螺旋纳米碳纤维双相炭黑的制备及结合胶性能研究[J].化工新型材料,2018,46(1):133-135,139.
[12] 李琳,龚勇,刘平,等.硝酸氧化法改善炭黑表面活性的研究[J].炭素技术,2018,37(4):56-60.
[13] 胡林清.聚碳酸酯型水性聚氨酯的合成及其荧光性能研究[D].自贡:四川轻化工大学,2020.
[14] 王陈鹏,刘佳伟,马跃,等.泡沫陶瓷/聚氨酯复合材料的制备及性能研究[J].化工新型材料,2023,51(5):266-269.
[15] 毕红杰.3D打印生物质/热塑性聚氨酯形状记忆复合材料功能研究[D].哈尔滨:东北林业大学,2022.
[16] Fernandez Arlas Borja,Corcuera M,Runt J,et al.Block architecture influence on the structure and mechanical performance of drawn polyurethane elastomers[J].Polymer International,2014,63(7):1278-1287.
[17] 杜卫宁,黄凯,李正军.改性纳米炭黑水性色浆/聚氨酯质量比对涂膜性能的影响[J].西部皮革,2015,37(12):8-11,19.
[18] Yao W,Xu F,Chen L,et al.Shape memory properties of TPI/acetylene black composites[J].Journal of Qingdao University of Science and Technology(Natural Science Edition),2010,31(1):67-70,102.
[19] Mai V,Nguyen D,Vu V,et al.Fast healing conductive polymer composite based on carbon black and polyurethane containing disulfide bonds[J].Journal of Vinyl and Additive Technology,2022,28(1):115-124.
基金资助
国家自然科学基金(52272042);钒钛资源综合利用四川省重点实验室项目(2022FTSZ15)
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