CHINESE JOURNAL OF POLYMER SCIENCE
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2025
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IF 4
Zhang Hou-Li,Sun Yu-Quan,Xu Yao,Wang Lu,Li Ying,Zhang Jie,Geng Bing,Li Shu-Sheng,Zong Chuan-Yong
The advancement of functional adhesives featuring recyclable and repairable properties is of great significance in interfacial science and engineering. Herein, a series of high-strength, recyclable fluorine-containing adhesives (ESO x -FPF) were designed and synthesized by crosslinking two prepolymers, FPF-B (derived from side-chain fluorinated diol, isocyanate, and aminoboric acid) and ESO-B (synthesized from biobased epoxy soybean oil and aminoboric acid), through dynamic boro-oxygen bonds. The resulting adhesive exhibited an optimal tensile strength of 42 MPa and the shear strength on steel plates reached as high as 3.89 MPa. More importantly, benefiting from the dynamic reversibility of the boron-oxygen bonds along with the hydrogen bonds interaction, ESO x -FPF can be welded with the assistance of solvents and recycled for multiple cycles. The outstanding healing efficiency and excellent reprocessability of these functional adhesives were confirmed by mechanical testing. Moreover, the as-prepared adhesives demonstrated universal and remarkable adhesion to various substrates, such as aromatic polyamide, aluminum plates and polycarbonate, meanwhile, they could be easily disassembled and recycled using ethanol without damaging the substrates surface. This study not only provides a simple strategy for the synthesis of eco-friendly adhesives with weldable and recyclable properties, but also sheds light on the development of other functional materials utilizing dynamic covalent chemistry.
研究领域:
界面科学
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材料工程
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化学工程
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产品关联
DOI
高影响因子
POLYMER INTERNATIONAL
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2024
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IF 2.9
Shilong Zhang,Youhao Xiong,Yangwei Wang,Yuqi Ma,Jialiang Li,Chaobo Jiang,Ce Wang,Yanling Zhu,Yongsheng Zhao,Guangcheng Zhang
Polyurea (PU) elastomers have attracted considerable attention in the field of protective polymeric coatings. In this work, a dithiol-terminated boronic ester was synthesized and used to incorporate dynamic boron–oxygen (B–O) bonds in the PU main chain based on thiol isocyanate while amino-terminated polydimethylsiloxane (PDMS) was introduced to retain good chain flexibility. The modified PU elastomer was found to have a microphase-separated structure in which the hard blocks served as physical crosslinks. The glass transition temperature ( T g ) slightly increases when dynamic B–O bonds exist while further introduction of PDMS soft segment can lower T g to −55.63 °C. The introduction of dynamic B–O bonds and diminished hydrogen bonding led to a decrease in mechanical strength and elongation at break. Interestingly, the simultaneous incorporation of PDMS and dynamic B–O bonds is favorable for strain rate dependence and suppressing stress relaxation. The potential for bond-exchange interactions between the dynamic B–O bonds and hydroxyl groups on metal surfaces substantially improved the adhesion of the PU elastomer to metal substrates. Therefore, our work can offer valuable insights for the structural design of functional PU coatings tailored for anti-impact applications. © 2024 Society of Chemical Industry.
研究领域:
材料科学
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聚合物化学
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DOI
高影响因子
ACS Applied Polymer Materials
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2024
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IF 4.4
Haiyan Mao,Yiyang Zhang,Lixiang Zhao,Han Li,Huanling Wu,Ling Lin
Fabric coatings, offering a range of benefits to personal health and the environment and addressing other specific needs, present a promising application in various fields. However, ensuring their long-term reliability, durability, and recyclability remains crucial to meet the demands of practical applications and sustainable development. To address this problem, we have developed a self-healing polyurethane (BPU) that integrates phenylboronic acid groups into the polyurethane chains and cross-links them to form dynamic boroxine bonds. This unique structure endows the BPU with a healing efficiency of 94%, a recycling efficiency of 93%, and an adhesion strength to cotton fabric of 1.42 MPa due to the high mobility of polymer chains and dynamic boroxine bonds. Leveraging these exceptional properties, we successfully prepared a multifunctional coating fabric (BPU/APD) by incorporating an azobenzene–polyurethane polymeric dye (APD) with BPU as a binder. This BPU/APD-coated fabric shows reversible photoisomeric behavior, remarkable ultraviolet protection function (UPF = 85.8), and excellent durability against washing and adhesion. Notably, the coated fabric can fully heal tiny scratches at 60 °C under 3 MPa for 5 min. After undergoing four healing cycles, the fractured coating fabric retains over 85% of its initial strength following the first healing, indicating its multiple healing capabilities. Moreover, the BPU/APD coatings on the waste fabrics can be recycled and reused repeatedly, maintaining a similar color strength and adhesion strength. This research paves the way for the development of multifunctional coating fabrics through the creation of self-healing polyurethane coatings, proving its great potential in smart textiles.
研究领域:
材料科学
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纺织工程
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环境科学
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产品关联
DOI
高影响因子
POLYMER
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2023
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IF 4.6
Yongsheng Zhao,Jialiang Li,Yuqi Ma,Yangwei Wang,Chaobo Jiang,Haonan Yan,Ruosong Hao,Jianbin Qin,Xuetao Shi,Guangcheng Zhang
Chemically crosslinking can enhance mechanical strength , dimensional stability and heat-resistance of thermoplastic polyolefin elastomers . However, chemically crosslinked elastomers suffer from reduction of flowability and strong shrinkage after reprocessing. In this work, inspired by vitrimer concept, olefin block copolymer (OBC) elastomer was chemically modified with dynamic boronic ester bond through one-step reactive processing. Based on the swelling test, FT-IR sperctra and DMA investigation, OBC vitrimer with tunable composition of dynamic Boron–Oxygen(B–O) bonds has been successfully prepared. Based on classical Arrhenius theory, the calculated activation energy (E a ) of OBC vitrimers ranges from 7.838 kJ/mol to 46.851 kJ/mol due to combined effect of chemical and dyanmic crosslinks. The prepared OBC vitrimers shows good creep-resistance, great reprocessability and good mechanical properties including tensile strength up to 15 MPa, elongation at break of 2300%, and elastic recovery of 90% at 300% strain. Interestingly, OBC vitrimers show significantly improved high-temperature mechancial property, i.e., tensile strength of ∼0.12 MPa and elongation excess 1200% at 120 °C where both OBC and OBC-DCP samples break instantly. Therefore, our work shows a promising industrial-scale strategy to prepare vitrimer elastomers via reactive processing, and provides guidance for molecular design of high-performance vitrimeric polyolefin elastomers.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
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2021
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IF 6.986
Zekun Zhang,Rui Tian,Daolei Lin,Dezhen Wu,Chao Lu,Xue Duan
It is of great significance to disclose the diverse aging pathways for polymers under multiple factors, so as to predict and control the potential aging evolution. However, the current methods fail to distinguish multiple pathways (multi-paths) of polymer aging due to the lack of spatiotemporal resolution. In this work, using polyimide as a model polymer, the hydroxyl, carboxyl, and amino groups from the polyimide aging process were labeled using specific fluorescent probes through boron-oxygen, imine, and thiourea linkages, respectively. When the excitation and emission wavelengths of each fluorescent probe were controlled, the multi-paths in polyimide aging can be visualized individually and simultaneously in three-dimensional fluorescent images. The overall aging process under hydrothermal treatment was destructured into the pyrolysis and hydrolysis pathways. Three-dimensional dynamic studies discovered that the increased humidity, along with the decreased oxygen content, could hamper the pyrolysis reaction and accelerate the hydrolysis reaction, leading to severe degradation of the overall polyimide aging. More importantly, the oxygen showed a higher regulation coefficient in accelerating the pyrolysis reaction, than the water vapor in motivating the hydrolysis reactions. Such a multidimensional identification methodology is able to guide the long-term use of polymers and control their aging process to a harmless direction in advance by tuning the contents of oxygen and water vapor.
研究领域:
材料科学
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高分子化学
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分析化学
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 34
·2504456
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IF 19
Lei Liu,Shifan Yu,Yijing Xu,Hongyu Chen,Huasen Wang,Wansheng Lin,Yu Hu,Zijian Huang,Chao Wei,Yuchen Lin,Ziquan Guo,Tingzhu Wu,Jianghui Zheng,Zhong Chen,Yuanjin Zheng,Xinqin Liao
Embodied intelligent tactile systems represent a groundbreaking paradigm for autonomous agents, facilitating dynamic perception and adaptation in unstructured environments. Traditional von Neumann architectures suffer from inefficiencies due to the separation of sensing and memory units, where mechanical relaxation is often overlooked as non-informative noise rather than utilized as a computational resource. The transition dynamics from mechanical stimulation to memory encoding and their potential in neuromorphic interactions remain largely unexplored. Here, we present a transformative breakthrough in the seamless integration of sensing and memory (SMI) within a single device through programmable tactile memory. Utilizing polyborosiloxane (PBS) filament networks with dynamically reversible boron-oxygen and hydrogen bonds, the design enhances adhesion and energy dissipation. It enables pressure-induced electrically readable memory states with tunable retention times (260 ms to 63.9 s) and 99.6% linearity, supporting applications, such as threshold triggering, biomimetic pain perception, and motion recognition. The SMI sensor's in-sensor memory and logic functions facilitate intelligent control, while its memory retention capabilities enable pain visualization and action-driven modulation. Additionally, the spatiotemporal tactile memory achieves high-precision motion recognition (98.33%) without relying on continuous time-series data. This work introduces a novel mechanism for constructing SMI devices, advancing the development of intelligent neuromorphic tactile systems.
研究领域:
类脑工程
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触觉传感
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柔性电子
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人工智能
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软体机器人
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材料科学
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传感器内计算
✓ 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）