ACS Applied Polymer Materials
·
2020
·
IF 0
Min Xu,Bo Cheng,Yeming Sheng,Jiahui Zhou,Minhui Wang,Xiaolin Jiang,Xun Lu
There is a trade-off between mechanical and self-healing performance for cross-linked self-healing materials. Herein, we design a polyurethane material containing triple synergy dynamic bonds to address the dilemma. The as-prepared polyurethane exhibits a maximum stress of 27.3 MPa and excellent self-healing performance. Specifically, boric acid is used as a cross-linker and the network cross-linked with boronic ester bonds under alkaline conditions is highly beneficial in terms of mechanical properties. Meanwhile, disulfide bonds and reversible boronic ester bonds located at the cross-linked point and main chain are successively broken upon being damaged, which is conducive to better fluidity of chains and endows the material with superior healing efficiency and multiple cycles of healing. Consequently, the high-performance self-healing material is of great potential in the fields of high-performance coating, aerospace, and load-bearing rubber.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
CHEMISTRY-A EUROPEAN JOURNAL
·
2023
·Vol. 29
·期 38
·e202300969
·
IF 4.3
Huaqiang Ju,Qing Li Zhu,Min Zuo,Songmiao Liang,Miao Du,Qiang Zheng,Zi Liang Wu
Graphical Tough hydrogels were developed by forming robust hydrazide-Zn 2+ coordination complexes. The mechanical properties of the resultant gels exhibited a notable temperature dependence and thus a good shape-memory ability due to the dynamic nature of coordination bonds. The reactive amine group of the hydrazide enables facile surface modification and functionalization based on Schiff's base reactions. Energy dissipation based on dynamic fracture of metal ligands is an effective way to toughen hydrogels for specific applications in biomedical and engineering fields. Exploration of new kinds of metal-ligand coordinates with robust bonding strength is crucial for the facile synthesis of tough gels. Here a hydrogel toughening strategy based on the formation of robust coordination complexes between the hydrazide ligands and zinc ions is reported. The resultant hydrogels exhibit high strength and toughness at room temperature. Their mechanical properties show temperature dependence due to the dynamic nature of coordination bonds. In addition, the amine group of hydrazides in the gel matrix provides a reactive site for Schiff's base reaction, enabling surface modification without influence on overall mechanical performances of the gel. The hydrazide ligands are easy to synthesize and can coordinate very well with several transition metals. Such a metal-ligand coordination should be suitable to develop tough soft materials with versatile applications.
研究领域:
材料科学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2021
·
IF 3.882
Shengping Dai,Meng Li,Hao Yan,Hao Zhu,Hongwei Hu,Yixing Zhang,Guanggui Cheng,Ningyi Yuan,Jianning Ding
Adhesive and self-healing elastomers are urgently needed for their convenience and intelligence in biological medicine, flexible electronics, intelligent residential systems, etc. However, their inevitable use in harsh environments results in further enhancement requirements of the structure and performance of adhesive and self-healing elastomers. Herein, a novel self-healing and high-adhesion silicone elastomer was designed by the synergistic effect of multiple dynamic bonds. It revealed excellent stretchability (368%) and self-healing properties at room temperature (98.1%, 5 h) and in a water environment (96.4% for 5 h). Meanwhile, the resultant silicone elastomer exhibited high adhesion to metal and nonmetal and showed stable adhesion in harsh environments, such as under acidic (pH 1) and alkaline (pH 12) environments, salt water, petroleum ether, water, etc. Furthermore, it was applied as a shatter-proof protective layer and a rust-proof coating, proving its significant potential in intelligent residential system applications.
研究领域:
材料科学
·
生物医学工程
·
柔性电子
✓ 已验证
DOI
高影响因子
Science China-Chemistry
·
2021
·Vol. 65
·期 2
·363-372
·
IF 9.445
Zhang Luzhi,Guan Qingbao,Shen Ao,Neisiany Rasoul Esmaeely,You Zhengwei,Zhu Meifang
The development of spontaneously self-healing materials with excellent mechanical properties remains a formidable challenge despite the extensive interest in such materials. This is because the self-healing and mechanical properties of a material are usually optimized via contradictory routes. The present study demonstrated a supertough spontaneously self-healing polymer, Fe-(2,6-diacetylpyridine dioxime)-urethane-based polyurethane (Fe-PPOU) based on septuple dynamic bonds integrated in one chemical group. A synergistic effect was induced by the presence of multiple dynamic crosslinking points, which comprised the integrated dynamic interactions, and the hidden lengths of the folded polymeric chains in Fe-PPOU. Thus, the mechanical and self-healing properties of the polymer were simultaneously optimized. Fe-PPOU demonstrated the highest reported toughness (139.8 MJm −3 ) among all the room-temperature spontaneously self-healing polymers with a nearly 100% healing rate. Fe-PPOU exhibited instant (30 s) self-healing to reach a strength of 1.6 MPa that was higher than the original strength of numerous recently reported self-healing polymers.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Weixiang Xu,Hao Liu,Jianmin He,Bingtao Bao,Jia Jiang,HanZhong Ren,Yiting Xu,Birong Zeng,Conghui Yuan,Lizong Dai
Polyurethanes (PUs) containing multiple dynamically have been extensively studied, however combining their mechanical, self-healing and anti-corrosion ability remains a significant challenge. Therefore, this paper successfully prepared PU coating (PU-SS-Salen-Ni) by introducing Ni 2+ coordinated Salen and bis(4-hydroxyphenyl) disulfide chain extenders . PU-SS-Salen-Ni with quadruple dynamic bonding exhibited excellent tensile strength (15.4 MPa), toughness (72 MJ·m −3 ) and superior self-healing efficiency (86.8 %) after being held at 80 °C for 4 h. Meantime, the |Z| f=0.01Hz of PU-SS-Salen-Ni coating reached at 9.35 × 10 6 Ω·cm 2 at the beginning of immersion, and even maintained at 6.99 × 10 6 Ω·cm 2 after 28 days immersion due to the synergistic effect of multiple dynamic bonds. This study provides insight into the design of PU elastomers with sustainable self-healing, excellent mechanical properties and corrosion protection .
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2024
·Vol. 62
·期 15
·3381-3398
·
IF 3.9
Ming Chen,Mengqing Ren,Jiaming Chen,Yajun Lu,Qingsong Shi,Lili Wu
As a functional material, polyurethane elastomers have found different applications in a variety of fields such as flexible electronics and smart coatings, but due to the damage during use, they are often endowed with self-healing properties. However, conventional intrinsically self-healing polyurethanes often don't balance excellent mechanical and self-healing properties, so it has become crucial to prepare polyurethane elastomers with excellent self-healing properties and high mechanical properties. In this study, a self-healing waterborne polyurethane elastomers (IP-DTDAx-BAy-WPU-n) was synthesized based on 4, 4-diaminodiphenyl sulfide (DTDA) boronic acid (BA). The disulfide bond has high motility at low temperatures and induces molecular-level healing at the damaged interface, contributing to good repair under mild conditions. The borate ester bond limits intermolecular chain slippage and improves the mechanical properties as a dynamic cross-linking point, while its dynamic reversible effect can synergistically improve the self-healing ability. The results show that the synthesized elastomer films have good mechanical properties (strength 23.21 MPa, elongation at break 1259.08%, toughness 83.28 MJ m −3 ), good elastic recovery and self-healing properties (93%). Furthermore, a composite conductors (IP-DTDAx-BAy-WPU/AgNWs) with self-healing properties was prepared by compositing AgNWs nanowires with polyurethane elastomers, which laid the foundation for its application in flexible electronic devices and wearable sensing devices. Graphical
研究领域:
材料科学
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柔性电子
·
智能涂层
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Xiaoyu Rong,Xinhai He,Lu Jiang,Rui Yu,Weifang Xu,Caiyun Zhang,Huanhuan Liu
Exploring new dynamic bonds for multifunctional hydrogel in fabricating wound dressing materials has received great attention recently. This paper introduces a multifunctional hydrogel designed for wound healing using a novel dual-dynamic-bond cross-linking of Ag–Se coordination bonds and Se–Se diselenide bonds. These dynamic bonds give the hydrogel excellent mechanical and multistimulus self-healing capabilities. The redox sensitivity of the Se–Se bonds allows for adjustable adhesion capacity and easy removal of the hydrogel when exposed to stimuli like hydrogen peroxide (H2O2), addressing a common challenge in wound dressing. Moreover, the hydrogels also demonstrated antibacterial and hemostatic properties. Furthermore, the dual-dynamic cross-linked hydrogel dressings showed enhanced wound healing in mice with full-thickness skin wounds compared to the 3 M Tegaderm dressing. The hydrogel’s versatility, stemming from its robust structural characteristics, renders it appropriate for addressing acute wound care.
研究领域:
生物材料学
·
医学工程
·
组织工程
✓ 已验证
DOI
高影响因子
Polymer Chemistry
·
2020
·Vol. 12
·期 5
·660-669
·
IF 5.342
Lun Zhang,Dong Wang,Liqiang Xu,Aimin Zhang
Supramolecular elastomers, possessing excellent mechanical, reusable adhesivity, and rapid self-healing properties, are essential for use in various applications. Herein, we developed a novel polyamide-urea elastomer with metal–ligand interactions and hydrogen bonds forming synergetic double dynamic bonds. Physical crosslinking endows the polyamide-urea elastomer with extreme stretchability and rapid self-healing ability at room temperature. The representative polyamide-urea elastomer, DPPy1–Fe2, can be stretched to 40× its original length without breaking, and has extraordinary notch-insensitive elongation of up to 3500%. Meanwhile, DPPy1–Fe2 can fully restore its elasticity modulus within 5 min at room temperature, and the elongation also reaches 3000% after 30 min of healing. In addition, the unique dynamic bonds of the supramolecule enable it to repeatedly and firmly adhere to different surfaces. The shear strength of DPPy1–Fe2 is restored to an appreciable 80% after the first detachment–reattachment cycle, with it still possessing excellent adhesive strength after multiple cycles. As a result, the supramolecular elastomer shows outstanding stretchability, tear-resistance, quick self-repairing, and reusable adhesivity, which will facilitate the progress of intelligent adhesivity and flexible electronics.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 23
·期 13
·7342
·
IF 6.208
Fenghui Qiao,Zhiqi Jiang,Wen Fang,Jingzhi Sun,Qiaoling Hu
In this work, we report the fabrication and functional demonstration of a kind of dually responsive nanoparticles (NPs) as a potential drug delivery vector. The pH value, corresponding to the acidic microenvironment at the tumor site, and mannitol, to the extracellular trigger agent, were employed as the dually responsive factors. The function of dual responses was achieved by breaking the dynamic covalent bonds between phenylboronic acid (PBA) groups and diols at low pH value (pH 5.0) and/or under the administration of mannitol, which triggered the decomposition of the complex NPs and the concomitant release of anticancer drug of doxorubicin (DOX) loaded inside the NPs. The NPs were composed of modified chitosan (PQCS) with quaternary ammonium and PBA groups on the side chains, heparin (Hep), and poly(vinyl alcohol) (PVA), in which quaternary ammonium groups offer the positive charge for the cell-internalization of NPs, PBA groups serve for the formation of dynamic bonds in responding to pH change and mannitol addition, PVA furnishes the NPs with diol groups for the interaction with PBA groups and the formation of dynamic NPS, and Hep plays the roles of reducing the cytotoxicity of highly positively-charged chitosan and forming of complex NPs for DOX up-loading. A three-step fabrication process of drug-loaded NPs was described, and the characterization results were comprehensively demonstrated. The sustained drug release from the drug-loaded NPs displayed obvious pH and mannitol dependence. More specifically, the cumulative DOX release was increased more than 1.5-fold at pH 5.0 with 20 mg mL−1mannitol. Furthermore, the nanoparticles were manifested with effective antitumor efficient and apparently enhanced cytotoxicity in response to the acidic pH value and/or mannitol.Keywords:chitosan;drug delivery;nanoparticle;dual response;dynamic bond
研究领域:
生物材料学
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药剂学
·
肿瘤学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
·
2022
·
IF 5.582
Hang Yang,Xi Chen,Bonan Sun,Jingda Tang,Joost J. Vlassak
Among soft materials, hydrogels with dynamic bonds that can be activated by a range of stimuli including temperature, pH, and infrared or ultraviolet light, constitute a special class of materials with unusual properties such as self-healing, actuation , and controlled degradation. Here, we take a hydrogel with reconfigurable disulfide crosslinks as an example and investigate its mechanical behavior. We demonstrate that this material has excellent fracture and fatigue resistance when the disulfide crosslinks are activated by ultraviolet illumination. We propose a simple constitutive model that describes the mechanical behavior of the material under a broad range of conditions.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Shuntian Huang,Zhaojun Wang,Qichang Zhou,Shujuan Yang,Riting Huang,Keyang Mai,Wenqi Qin,Junhao Huang,Gaobo Yu,Yuhong Feng,Jiacheng Li
Polysaccharide-based soft colloidal particles mediated by the dynamic bonding-engineered interfacial self-assembly can regulate the properties of oil-water interfacial films, availing the stability of emulsions under a wide pH range. The amphiphilic phenylboronic alginate soft colloidal particles (Alg-PBA) were designed to stabilize pH-responsive Pickering emulsions (PEs). Combining stability analysis with quartz crystal microbalance and dissipation monitoring (QCM-D), the microstructure and viscoelasticity of Alg-PBA at the oil-water interface were determined. The results showed that PEs stabilized by Alg-PBA due to a thicker and stronger viscoelastic interface film induced by B O bonds and hydrogen bonds . The structure-function relationship of the Alg-PBA emulsifier driven by dynamic bonds was further elaborated at multiple scales by laser scanning microscopy (CLSM) and scanning electron microscopy (SEM). Meanwhile, the microstructure of aerogels templated by emulsion could be tuned by adjusting dynamic bonds, which provides a new idea for polysaccharide soft material engineering.
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULES
·
2020
·
IF 5.918
Cheng-Jie Fan,Zhi-Bin Wen,Zhi-Yuan Xu,Yi Xiao,Di Wu,Ke-Ke Yang,Yu-Zhong Wang
Currently, a variety of elastomers with a self-healing capacity and reprocessability have been developed by dynamic chemistry to extend the service life, increase the reliability of polymeric materials, and reduce the waste. However, it is still a large challenge to seek an appropriate dynamic interaction that may perfectly match the general performance of the target polymeric materials such as polyurethane. Herein, we report a poly(thiourethane-urethane) (PTUU–Nx) elastomer containing dynamic thiourethane bonds prepared via a thiol–isocyanate click reaction, which is stable at room temperature, healable at moderate temperature, and reprocessable at high temperature. Importantly, it exhibits a mechanical strength similar to the polyurethane because of a very similar structure. The dynamic feature of PTUU–Nx is demonstrated theoretically and experimentally to originate from the exchange of thiourethane bonds via the reversible generation of isocyanates and thiols. Most importantly, the thiourethane bond possesses a much lower bond dissociation energy than the urethane bond, which not only makes PTUU–Nx elastomers easier to be reprocessed but also endows them with a desirable self-healing ability under moderate conditions. In addition, the optimized sample PTUU–N2 is utilized to fabricate a conductive device by coating Ag glue on the elastomer surface and inserting the coated elastomer into a circuit, which displays a high self-healing efficiency, as the material recovers to its original mechanical property and conductivity. Therefore, these results not only indicate that the PTUU–Nx elastomers have considerable potential for applications in intelligent electronic devices but also provide new ideas for developing new self-healing materials by applying the adaptable dynamic bond to the target polymers.
研究领域:
材料科学
·
高分子化学
·
智能材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）