ACS Applied Polymer Materials
·
2024
·
IF 4.4
Fenglong Li,Xiaolin Wang,Jiyang Zuo,Chao Chen,Jing Chen,Jin Zhu,Wu Bin Ying
3D printing has emerged as a highly accurate, highly customizable, and low-cost fabrication method to realize structures with designed geometry. However, the integral printing of complex structures, such as suspended structures, still poses significant challenges in the most commonly used 3D printing technology-fused filament fabrication (FFF). Therefore, designing a self-healing material, segmenting the printing of complex structures, and finally assembling them into a whole by the self-healing capability are expected to resolve this issue. In this research, we successfully synthesized a self-healing polyurethane (LNPU-3) with the introduction of dynamic oxime-urethane bonds. Specifically, we employed polycaprolactone diol as the soft segment, 2,4-pentanedione dioxime as the chain extender, and 4,4′-methylenebis(phenyl isocyanate) as the hard segment. LNPU-3 exhibited outstanding mechanical properties, with a tensile stress of 8.5 MPa and a fracture toughness of 20.1 MJ/m3. Even after cyclic stretching five times at a strain of 30%, the specimen could still recover 95% of its original value. Furthermore, LNPU-3 could be fully self-healed at room temperature (25 °C) within 8 h, with a healing efficiency of 92.9%. Finally, LNPU-3 was successfully printed by using FFF and the self-healing capability of the printed samples was tested. The printing components were then assembled into a complex structure that was difficult to print as a whole. In summary, LNPU-3 is an ideal self-healing 3D printing material, demonstrating significant potential for the application of self-healing materials and the advancement of 3D printing technology.
研究领域:
材料科学
·
化学工程
·
3D打印技术
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2018
·
IF 3.485
Libang Feng,Zhengyang Yu,Yaohui Bian,Yanping Wang,Yanhua Zhao,Liuxiaohui Gou
Materials can suffer from different damages in actual application. Consequently, diversified failure modes can be caused, while different failures may have unalike repairing effect. Thereupon, it is quite important of exploring the effect of failure modes on the repairing behavior of self-healing materials. Herein, a kind of thermoplastic polyurethane containing Diels-Alder bonds (PU-DA) has been synthesized successfully. Based on the dual actions of thermo-reversible Diels-Alder reaction and molecular movement, the as-prepared polyurethane exhibits excellent self-healing performance. The repairing behavior of polyurethanes with different failure modes has been investigated both qualitatively and quantitatively. Results show that polyurethanes with various cracks can be repaired. However, PU-DA film with shallower crack exhibits a high healing efficiency as compared to that with deeper crack at the similar heat treatment. Meanwhile, polyurethane has multiple healing capability and cracks can be caused and repaired repeatedly. Additionally, PU-DA fragments can recombine together as a whole even after destroyed by tearing, indicating PU-DA also exhibits outstanding reprocessing capability. The research can lay foundation for realizing the favorable repairing of various failure modes, and further promote self-healing materials and technology applied into practice.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2023
·Vol. 44
·期 19
·2300286
·
IF 4.6
Jia-Hui Zhong,Yan Zhou,Xin-Xin Tian,Ying-Lu Sun,Bi-Ru Shi,Zhen-Yu Zhang,Wen-Hua Zhang,Xiang-Dong Liu,Yu-Ming Yang
This study explores new applications of black phosphorus quantum dots (BPQDs) by adding them to self-healing material systems for the first time. Self-healing polyurethane with an ultra-small amount of BPQDs has biomimetic intelligent responsiveness and achieves balance between its mechanical and self-healing properties. By adding 0.0001 wt% BPQDs to self-healing polyurethane, the fracture strength of the material increases from 3.0 to 12.3 MPa, and the elongation at break also increases from 750% to 860%. Meanwhile, the self-healing efficiency remains at 98%. The addition of BPQDs significantly improves the deformation recovery ability of the composite materials and transforms the surface of self-healing polyurethane from hydrophilic to hydrophobic, making it suitable for applications in fields such as electronic skin and flexible wearable devices. This study provides a simple and feasible strategy for endowing self-healing materials with biomimetic intelligent responsiveness using a small amount of BPQDs.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Kaizhen Wan,Yue Cai,Qihui Chen,Maochun Hong,Zhao-Xi Zhou,Heqing Fu
Widely employed as polymers, polyurethanes also struggle to strike a balance between mechanical and self-healing qualities. Extrinsic self-healing can readily result in the production of material defects and stress concentration, which can result in the loss of mechanical property. In this study, self-healing and mechanical properties were combined to create a self-healing polyurethane nanocomposite film (PUHN) with good fatigue resistance. Reversible hydrogen and disulfide bonds were introduced to the polyurethane film, meanwhile, carbon-coated nickel nanoparticles were dispersed into the matrix as fillers during the early stage of polymerization. The results showed that PUHN combines outstanding mechanical properties with excellent self-healing properties, while the tensile strength of PUHN was increased by 38 % to 2.32 MPa due to the small-size effect caused by the introduction of nanoparticles. The introduction of reversible disulfide bonding and the presence of abundant hydrogen bonding give PUHN excellent self-healing properties, which can reach 91.2 % self-healing efficiency after 3 h in an oven at 80℃. Meanwhile, the fatigue resistance of the composite material also shows considerable application potential for use in packaging.
研究领域:
材料科学
·
纳米技术
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-13
·
IF 14.919
Jiang Chenyu,Zhang Luzhi,Yang Qi,Huang Shixing,Shi Hongpeng,Long Qiang,Qian Bei,Liu Zenghe,Guan Qingbao,Liu Mingjian,Yang Renhao,Zhao Qiang,You Zhengwei,Ye Xiaofeng
The unique properties of self-healing materials hold great potential in the field of biomedical engineering. Although previous studies have focused on the design and synthesis of self-healing materials, their application in in vivo settings remains limited. Here, we design a series of biodegradable and biocompatible self-healing elastomers (SHEs) with tunable mechanical properties, and apply them to various disease models in vivo, in order to test their reparative potential in multiple tissues and at physiological conditions. We validate the effectiveness of SHEs as promising therapies for aortic aneurysm, nerve coaptation and bone immobilization in three animal models. The data presented here support the translation potential of SHEs in diverse settings, and pave the way for the development of self-healing materials in clinical contexts.
研究领域:
生物医学工程
·
材料科学
·
组织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Carbon Letters
·
2022
·Vol. 33
·期 1
·163-175
·
IF 3.117
Liu Shouxiang,Chen Yu,Qiao Yang,Li Zhiqiang,Wei Yanyan
Cracks are an inevitable problem during the use of materials, and flexible sensors with self-healing capability are of great importance for applications in wearable devices and skin-like electronic devices. This paper prepared self-healing flexible strain sensors by compounding self-healing polyurethane with carbon nanotubes. First, by changing the ratio of disulfide bonds, a good balance between mechanical properties and self-healing efficiency was achieved in the prepared self-healing polyurethane. The most balanced sample reached 12.28 MPa in tensile strength, after 24 h of self-repair at 30 °C, the tensile strength was 7.75 MPa, and the self-repair efficiency was 63.11%; after 24 h of self-repair at 80 °C, the tensile strength was 11.64 MPa, and the self-repair efficiency reached 94.79%. Then the sensors prepared by compounding with carbon nanotubes showed a good electrochemical response, and both slow and fast repeated bending of the finger wearing the sensors yielded significantly different electrical signal changes, and the sensors were cut off and still had the same function after self-repair at 30 °C, demonstrating their excellent potential for applications in soft robots, wearable devices, etc.
研究领域:
材料科学
·
纳米技术
·
可穿戴技术
·
软体机器人
✓ 已验证
DOI
高影响因子
Soft Matter
·
2020
·Vol. 17
·期 8
·2191-2204
·
IF 3.14
Yanlong Luo,Xianling Chen,Jialiang Chen,Zhipeng Wu,Hongming Ma,Xuejing Liu,Bo Xiang,Xiaofeng Ma,Zhenyang Luo
An intrinsic self-healing polyurethane (PU) elastomer with excellent self-healing efficiency was prepared. The self-healing properties of this elastomer as well as the temperature dependence of self-healing can be tailored by regulating the molar ratio of hard to soft segments. The self-healing efficiency of 92.5% is the highest when the molar ratio of 4,4-methylenedicyclohexyl diisocyanate (HMDI) to polypropylene carbonate polyol (PPC) is 1.3 and the temperature is 25 °C. In situ temperature swing infrared spectra and low-field nuclear magnetic resonance reveal that the soft segment, PPC, endows PU with a dense dynamic hydrogen bond network, and the dissociation and reconstruction of the hydrogen bond network enable the PU to heal. To date, the exchange of hydrogen bonds has not been observed intuitively through experimental means. Therefore, the number, type, strength, lifetime, and the exchange of hydrogen bonds in the self-healing process at different temperatures were investigated by molecular dynamics (MD) simulation. The simulated results show that the type of hydrogen bond exchange between functional groups will be affected by temperature. The hydrogen bonds between urethane and urea groups play a leading role in the self-healing properties due to the high strength and a large number of hydrogen bonds at both 25 and 50 °C. The stronger strength, longer lifetime, and greater number of effective hydrogen bonds at 25 °C make the self-healing efficiency of PU higher than at 50 °C.
研究领域:
材料科学
·
聚合物化学
·
计算化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Kang Chen,Haoxin Zhu,Zhiyi Zhang,Yingqing Shao,Qianhui Yu,Xinlei Cao,Siyan Pan,Xin Mu,Zhenhua Gao,Di Wang,Shuangying Wei,Shuaiyuan Han
Self-healing coatings represent a promising advancement in intelligent materials, as they possess the ability to autonomously heal damage through a self-regeneration mechanism. However, a significant challenge is to strike a balance between the self-healing capability and mechanical performance under specific healing conditions, such as heat or light. This limitation hinders the application of self-healing coatings. This study describes a series of syntheses of a waterborne polyurethane (WPU) based on a vanillin-derived aromatic Schiff base (VASB). The VASB-WPU was created by incorporating dynamic reversible covalent bonds into the backbone chain and introducing supramolecular interactions (hydrogen bonds and ionic bonds) into the side chain. The VASB-WPU exhibits self-healing properties and vitrimer characteristics. By implementing a healing process that involves light and heat stimulation, the VASB-WPU exhibits an impressive healing efficiency of 92.43% in thin films while maintaining exceptional mechanical performance, with a tensile stress of 10.59 MPa and a toughness of 16.56 MJ/m 3 . Furthermore, the VASB-WPU coatings exhibit exceptional multiple shape memory capabilities and self-healing effects. When applied to wooden surfaces, the VASB-WPU coatings can achieve 100% self-healing of a 5 μm scratch at the interface in just 3 min of irradiation. A new method has been introduced for developing intelligent self-healing coatings for wood.
研究领域:
材料科学
·
聚合物化学
·
涂层技术
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2021
·Vol. 12
·期 31
·4532-4545
·
IF 5.582
Tu Jing,Xu Heng,Xiang Guifeng,Chen Ling,Li Pingyun,Guo Xiaode
The formation and expansion of cracks in a propellant would induce debonding at the interface between different constituents and may even cause explosion of the propellant during launch. One way to prohibit debonding is the employment of self-healing polyurethane adhesives, which can heal cracks in the early stage. In this work, polypropylene glycol and isophorone diamine were used to prepare polyurethane adhesive with high-efficiency self-healing ability. The differences between the mechanical and self-healing properties of polyurethanes with a hard segment structure composed of different isocyanates were studied. The experimental results showed that PPG-IP-PA (polyurethane synthesized using polypropylene glycol, isophorone isocyanate and isophorone diamine) has excellent mechanical properties and high-efficiency room temperature self-healing ability. When compared with other polyurethanes, PPG-IP-PA has a strong molecular chain motion ability, and its continuous ring hard segment structure ensures the overall mechanical properties. Its maximum tensile strength can be up to 3.85 MPa and elongation at break almost reached 3000%. After placing at room temperature for 12 h, the mechanical properties of PPG-IP-PA can be fully restored. When PPG-IP-PA was applied to a propellant, it can restore 70% of the tensile strength of the completely broken grain after being placed at room temperature for 12 h, and there was no obvious interference to the thermal decomposition of AP-Al components. Our results provide a new designing concept in dealing with the debonding of components in propellants.
研究领域:
材料科学
·
化学工程
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
R. Longfang,L. Congcong,Q. Taotao
Based on the hydrolysis and dehydration of boroxine and boric acid, a boroxine was prepared from 3-Aminobenzeneboronic acid (3-ABBA). Then a novel boroxine-based self-healing polyurethane (BPU) which has a repeatable adhesive property under mild conditions was synthesized by using boroxine and polyurethane prepolymer . The chemical structure and thermal property were confirmed by Fourier transform infrared spectroscopy (FTIR) and thermal gravimetric analysis (TGA). When the mole ratio of isophorone diisocyanate (IPDI) and polypropylene glycol 2000 (PPG 2000) was 3:0, the mechanical strength and elongation at break of BPU film reached 1.63 MPa and 1577.79%. Meantime, BPU could be healed under the action of a water molecule and the self-healing rate was up to 92.02%. BPU film took on excellent self-healing property under mild conditions. In addition, BPU film could easily dissolve in N, N-dimethylacetamide (DMAC) to become an adhesive. The bonding strength of BPU adhesive to leather substrate reached 1.73 MPa, which was nearly the same as the standard value of adhesive used for shoes and bags. Interestingly, after the bonded leather was separated into two parts, they can adhere together again by spraying water on the bonding part. Through healing the bonding strength of BPU adhesive was still 1.65 MPa. Therefore, BPU is characterized by excellent repeatable adhesive property which has great potential application.
研究领域:
材料科学
·
高分子化学
·
粘合技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）