[1]童永仲,潘绍武,朱美芳.氢键/二硫键协同的室温修复聚氨酯的制备及性能研究[J].中国材料进展,2024,43(07):658-665.[doi:10.7502/j.issn.1674-3962.202303011]
TONG Yongzhong,PAN Shaowu,ZHU Meifang.Preparation of Room-Temperature Healable Polyurethanes Based on Synergistic Hydrogen Bonds/Disulfide Bonds and Study on Their Properties[J].MATERIALS CHINA,2024,43(07):658-665.[doi:10.7502/j.issn.1674-3962.202303011]
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氢键/二硫键协同的室温修复聚氨酯的制备及性能研究()
中国材料进展[ISSN:1674-3962/CN:61-1473/TG]
- 卷:
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43
- 期数:
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2024年第07期
- 页码:
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658-665
- 栏目:
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- 出版日期:
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2024-07-30
文章信息/Info
- Title:
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Preparation of Room-Temperature Healable Polyurethanes Based on Synergistic Hydrogen Bonds/Disulfide Bonds and Study on Their Properties
- 文章编号:
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1674-3962(2024)07-0658-08
- 作者:
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童永仲; 潘绍武; 朱美芳
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东华大学材料科学与工程学院 纤维材料改性国家重点实验室,上海 201620
- Author(s):
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TONG Yongzhong; PAN Shaowu; ZHU Meifang
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State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Material Science and Engineering,Donghua University,Shanghai 201620,China
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- 关键词:
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室温自修复; 聚氨酯; 硬段; 力学性能; 氢键; 二硫键
- Keywords:
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room-temperature self-healing; polyure-thanes; hard segments; mechanical properties; hydrogen bonds; disulfide bonds
- 分类号:
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TQ317
- DOI:
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10.7502/j.issn.1674-3962.202303011
- 文献标志码:
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A
- 摘要:
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自修复材料作为一类新兴的智能材料,具有广泛的应用前景,然而此类材料难以兼具良好的力学性能与自修复能力。以聚四氢呋喃(PTMEG)为软段、异佛尔酮二异氰酸酯(IPDI)和双(4-羟苯基)二硫醚(4-HD)为扩链剂共同构成硬段,通过两步扩链反应制备了室温自修复聚氨酯(PUHD),并分别研究了单体配比与扩链剂的分子结构对PUHD的力学与自修复性能的影响。结果表明:当R值(R=\[IPDI\]/\[PTMEG\])为1.5时,PUHD的综合性能最佳,拉伸强度、断裂伸长率与韧性分别为7.53 MPa、1447.80%与31.98 MJ/m3。PUHD-1.5具有良好的流变性能,在25与60 ℃下的特征弛豫时间分别为23.45与7.10 min,在25 ℃下修复6 h,断裂伸长率与拉伸强度的修复效率分别为95.29%和89.95%。扩链剂的分子结构对PUHD的自修复性能有显著影响,弱氢键作用与松散堆积的硬段有利于提高PUHD的自修复性能。
- Abstract:
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As a new kind of intelligent material,self-healing materials have a widespread application prospect.However,it is difficult to have both good mechanical properties and selfhealing ability.Here,using polytetrahydrofuran(PTMEG)as soft segments,isophorone diisocyanate(IPDI)and bis(4-hydroxyphenyl)disulfide(4-HD)as chain extenders constructing hard segments together,a room-temperature selfhealing polyurethane(PUHD)was prepared by two-step chain extension reaction.The effects of monomer ratio and molecular structures of chain extenders on the mechanical and selfhealing properties of PUHD were studied.The results showed that PUHD had the best comprehensive performance when the R value(R=\[IPDI\]/\[PTMEG\])is 1.5.The tensile strength,elongation at break and toughness reached 7.53 MPa,1447.80% and 31.98 MJ/m3,respectively.PUHD-1.5 had good rheological properties with characteristic relaxation time of 23.45 and 7.10 min at 25 and 60 ℃,respectively.The self-healing efficiency of elongation at break and tensile strength were 95.29% and 89.95% at 25 ℃ for 6 h,respectively.The molecular structures of chain extenders have a significant effect on the self-healing ability of PUHD.Weak interaction of hydrogen bonds and loosely-packed hard segments are beneficial to improve the self-healing properties of PUHD.
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备注/Memo
- 备注/Memo:
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收稿日期:2023-03-20修回日期:2023-05-03
基金项目:国家自然科学基金资助项目(52103252,52090033)
第一作者:童永仲,男,1996年生,硕士研究生
通讯作者:潘绍武,男,1987年生,研究员,博士生导师,
Email:pansw@dhu.edu.cn
更新日期/Last Update:
2024-06-26