ACS Applied Polymer Materials
·
2024
·
IF 4.4
Wanqin Gong,Jun Cheng,Dandan Pi,Chao Gao,Hantao Zou,Xueting Liu,Jincai Rao,Fushan Nie
The self-warning and thermal-induced self-healing microcapsules were fabricated by the interfacial in situ polymerization process, which consists of SiO2 as the shell material and epoxy resin, a thermal initiator, and a fluorescent agent as the core materials. The squeegee coating method was used to prepare the self-healing self-warning PVC-coated fabric. The microcapsules have a core–shell structure with an average particle size of 1.5 μm and a high sphericity with a coverage rate of 77% and excellent thermal stability below 320 °C. The PVC coating agent has good wettability with the microcapsules with a contact angle of 34.6 ± 0.9°. When cracks appear on the surface of the coated fabric containing microcapsules, the fluorescent agent and repair agent (epoxy resin and thermal initiator) will then flow out from the broken microcapsules and fill the cracks owing to the great wettability of the PVC coating agent with a contact angle of 44.2 ± 1.1°. Under UV light, the cut displays a yellow fluorescence line, indicating the location of the damage. After filling the cracks, the epoxy resin polymerizes with the thermal initiator at 120 °C. When the heating time reaches 6 h, the cuts in the fabric are healed, and the strength of the coated fabric reaches 699 N, thereby matching the original strength of 713 N before cutting.
研究领域:
材料科学
·
纺织工程
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产品关联
DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Ruitong Liu,Jing Yi,Shouhai Li,Jianling Xia,Mei Li,Haiyang Ding,Lina Xu,Xiaohua Yang,Na Yao
To fully utilize the forestry bioresources, a novel dual-cross-linkable resin monomer of MAHSWAGMA was prepared from Swida wilsoniana oil (SWO). FT-IR and 1H-NMR analysis demonstrated the successful synthesis of the target product. Five different cross-linking copolymers, including a polymerized vinyl ester/single-cross-linking (PVESC) polymer, a polymerized epoxy/single-cross-linking (PESC) copolymer, a thermal-photo-initiated/dual-cross-linking (TPIDC) copolymer, a photo-thermal-initiated/dual-cross-linking copolymer (PTIDC), and a thermal-initiated/dual-cross-linking copolymer (TIDC), were obtained with different preparation technologies by different initiated cross-linking processes. Thermal and mechanical properties of the five copolymers were all tested, and the effects of different preparation technologies on the properties of prepared copolymers were investigated. The prepared three dual-cross-linking copolymers had higher hardness, relative cross-linking density, glass transition temperature, and more excellent mechanical property than the other two single-cross-linking copolymers. The PTIDC copolymerized system obtained with photo first and thermal latter initiated dual-cross-linking preparation technology had the most excellent comprehensive properties. This study can provide an ideal idea for the design and preparation of dual-cross-linking copolymers based on forestry vegetable oil.
研究领域:
材料科学
·
林产化学加工工程
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 17
·11530-11536
·
IF 3.9
Bin Li,Aolin Wu,Wenrui Hao,Jizhen Liu,Zhigang Hu,Ying Wang
Deep eutectic solvent (DES) was synthesized from urea (U), acrylamide (AM) and choline chloride (ChCl), sodium alginate (SA) was selected as filler, and SA/P(U-AM-ChCl) composite hydrogel was prepared by thermal initiation frontal polymerization (FP). The hydrogels were characterised by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The effects of SA on the swelling properties, mechanical properties and self-healing properties of the composite hydrogels were investigated. The results show that the swelling properties of the composite hydrogel with the addition of SA are greatly enhanced due to the large number of hydroxyl groups contained in the SA chain. The tensile strength of the hydrogel gradually increased with increasing SA content, with the maximum tensile strength increasing by a factor of 2.89. The self-healing efficiency of the composite hydrogel gradually increased with the increase of SA, and the healing rate of FP5 reached 94.4% after 48 h of healing. This study provides a simple and rapid method for the preparation of composite hydrogels with good mechanical properties and self-healing properties.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 26
·16015-16021
·
IF 3.108
Chang Huang,Yifan Li,Lijie Duan,Linhui Wang,Xiuyan Ren,Guanghui Gao
In this investigation, a tough hydrogel was reinforced by macromolecular microspheres (MMs) as hydrophobic association centers via free radical polymerization with different initiation systems. The thermal initiator is potassium persulfate and the redox initiators include potassium persulfate and N,N,N′,N′-tetramethylethylenediamine (TMEDA). The mechanical measurements showed that the hydrogel with a redox initiation system possesses a tensile strength of 1.55 MPa, which is much higher than the hydrogel with a thermal initiator. Moreover, the hydrogel with redox initiators exhibited rapid self-recovery to its 90% original dimension in several seconds and low swelling property. The large difference in the morphology of hydrogels before and after swelling was due to the tight entanglement of molecular chains in the internal structure of hydrogels with redox initiators. As a result, the hydrophobic association hydrogels toughened by MMs with excellent mechanical properties would be useful for biomedical applications of tough tissue engineering, such as tendon, muscle, and blood vessel.
研究领域:
生物材料学
·
组织工程学
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产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Zhikang He,Rulin Shen,Taizhi Liu,Shuqi He,Yanling Gong
Manufacturing high-performance glass fiber epoxy composites (GFRP) through radical-induced cationic frontal polymerization (RICFP) is challenging. Achieving high fiber content is difficult due to low resin levels and inadequate chemical reactivity. This study systematically investigates the effects of ultraviolet (UV) light and local thermal initiation on RICFP using bisphenol A diglycidyl ether (BADGE) epoxy resin as the substrate. The preferred initiation method was identified, and the enthalpy change and thermal equilibrium of the resin's RICFP reaction were effectively controlled by optimizing preheating conditions, resin composition, and the initiator ratio. A method for preparing high-fiber-volume GFRP via RICFP was also proposed. Experimental results revealed that GFRP prepared by UV-initiated RICFP exhibited a 13.8 % increase in flexural strength, alongside an 11.8 % reduction in frontal temperature compared to local thermal initiation. By optimizing the resin composition for the RICFP process, a fiber volume fraction of up to 52 % was achieved. The frontal polymerization specimen's flexural strength increased by 27.7 % and 28.7 %, while its interlaminar fracture toughness improved by 11.9 % and 50.9 %, respectively, compared to the two thermal curing specimens (SEP-Heat Cured and BADGE-Heat Cured). Furthermore, dynamic thermomechanical analysis (DMA) demonstrated significant enhancements in the glass transition temperature, with increases of 69.14 % and 139.53 %, respectively. This study provides both a theoretical foundation and technical guidelines for the RICFP process, aiming to produce high-performance GFRP with a high fiber volume fraction.
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 RESEARCH
·
2024
·Vol. 31
·期 4
·1-12
·
IF 2.6
Liu Yunhe,Fang Xiya,Feng Zongze,Zhang Xiaotao,Wang Honggen,Shi Yan
Herein, we developed a reversible complexation mediated polymerization (RCMP) starting with a complex of iodine and organic salt as a deactivator and a thermal initiator for continuous regeneration of the organic salt activator. This novel polymerization method can be called as initiators for continuous activator regeneration (ICAR) RCMP, as inspired by the denomination of ICAR ATRP. The synthesis of poly (methyl methacrylate) (PMMA) ( M w / M n < 1.3) with good controllability was achieved via this technique when the concentration of the deactivator complex was as low as dozens of ppm. The studied three kinds of iodine complexes showed high control on the polymerization of MMA. The effects of initiator and deactivator complex concentration on the polymerization process were researched in detail. Furthermore, the accessibility of PMMA prepared by ICAR RCMP to chain extension and block copolymerization confirmed that this novel polymerization approach afforded polymers with high chain-end fidelity. The substantial decrease in the concentration of deactivator complex or activator plays a critical role for the production and application of well-defined polymer prepared by this method.
研究领域:
高分子化学
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材料科学
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高分子科学
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DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 52
·32988-32995
·
IF 3.361
Yinlei Lin,Shuoqi Wang,Sheng Sun,Yaoheng Liang,Yisheng Xu,Huawen Hu,Jie Luo,Haichen Zhang,Guangji Li
Introducing double physical crosslinking reagents (i.e., a hydrophobic monomer micelle and the LAPONITE® XLG nano-clay) into the copolymerization reaction of hydrophilic monomers of N,N-dimethylacrylamide (DMAA) and acrylamide (AM) is reported here by a thermally induced free-radical polymerization method, resulting in a highly tough and rapid self-healing dual-physical crosslinking poly(DMAA-co-AM) hydrogel. The mechanical and self-healing properties can be finely tuned by varying the weight ratio of nanoclay to DMAA. The tensile strength and elongation at break of the resulting nanocomposite hydrogel can be modulated in the range of 7.5–60 kPa and 1630–3000%, respectively. Notably, such a tough hydrogel also exhibits fast self-healing properties, e.g., its self-healing rate reaches 48% and 80% within 2 and 24 h, respectively.
研究领域:
材料科学
·
高分子化学
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
Sustainable Materials and Technologies
·
2025
·
IF 9.2
Juan Lei,Kunlin Chen,Hua Qiu
Bio-based hydrogels have garnered significant attention in flexible sensing and biomedicine due to their exceptional biocompatibility and biodegradability. However, the developing flexible sensors capable of real-time biochemical monitoring during human activities remains a formidable challenge. In this study, we fabricated a novel pH-responsive poly(acrylic acid)/sodium alginate/starch hydrogels (PAA/SA/SH) with inherent antimicrobial properties through thermal polymerization. The hydrogel was synthesized by incorporating maize starch and sodium alginate with pH-sensitive itaconic acid and acrylic acid, while d -limonene was integrated to impart antimicrobial efficacy. The resulting PAA/SA/SH hydrogels exhibited remarkable pH-dependent swelling behavior, with an equilibrium swelling ratio increasing from 400 % at pH 2 to 9200 % at pH 12. This substantial swelling variation directly influenced the hydrogel's electrical conductivity, which was modulated by changes in volume and water content. Furthermore, the hydrogels demonstrated excellent biodegradability, adhesion, transparency, mechanical properties, stable sensing properties, and potent antimicrobial activity. Given these advantages, the pH-responsive behavior of PAA/SA/SH hydrogels holds significant promise for the development of wearable flexible sensors capable of monitoring pH fluctuations in human body fluids, offering potential applications in personalized healthcare and smart diagnostics.
研究领域:
材料科学
·
生物医学工程
·
高分子科学
·
传感器技术
·
柔性电子学
·
智能材料
·
生物降解材料
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产品关联
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Yinlei Lin,Yuhao Li,Jiashang Yin,Deqiang Liu,Guozhi Xu,Haichen Zhang,Zhipeng Yang,Huawen Hu
Double-physically crosslinked hydrogels are well-known for their exceptional self-healing and mechanical properties but often fall short in terms of biological functionality. Here, we introduce a novel betaine-based zwitterionic hydrogel designed to simultaneously enhance self-healing, mechanical strength, and biocompatibility. The hydrogel is synthesized via thermally initiated free-radical polymerization and utilizes dual physical crosslinking through hydrophobic monomer-based micelles and nanoscale Laponite XLG. The incorporation of betaine monomers further boosts the biological performance of the material. The resulting hydrogel exhibits excellent swelling behavior, achieving equilibrium within 48 h, with a water absorption capacity up to 5000 % and an equilibrium water content exceeding 98 %. Mechanically, the hydrogel exhibits a remarkable elongation at break of 1228 % under tensile testing. Furthermore, it shows exceptional self-healing properties, with fracture elongation recovery of 542.72 % after 2 h and 746.88 % after 24 h. Microscopic observations confirm near-complete healing within just 3 min. Cell viability assays reveal over 95 % cell survival in the presence of hydrogel extracts, confirming its excellent biocompatibility, high water retention, and mechanical resilience.
研究领域:
材料科学
·
高分子化学
·
生物医学工程
·
软物质物理
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Hao Ouyang,Shan Min,Jin Yi,Xiaoyu Liu,Fanghua Ning,Yi Xu,Yong Jiang,Bing Zhao,Jiujun Zhang
A composite solid-state electrolyte (SSE) with acceptable safety and durability is considered as a potential candidate for high-performance lithium–oxygen (Li–O2) batteries. Herein, to address the safety issues and improve the electrochemical performance of Li–O2 batteries, a solvent-free composite SSE is prepared based on the thermal initiation of poly(ethylene glycol) diacrylate radical polymerization, and an integrated battery is achieved by injecting an electrolyte precursor between electrodes during the assembly process through a simple heat treatment. The Li-metal symmetric cells based on this composite SSE achieve a critical current density of 0.8 mA cm–2 and a stable cycle life of over 900 h at a current density of 0.2 mA cm–2. This composite SSE effectively inhibits the erosion of O2 on the Li metal anode, optimizes the interface between the electrolyte and cathode, and provides abundant reaction sites for the electrochemical reactions during cycling. The integrated solid-state Li–O2 battery prepared in this work achieves stable long cycling (118 cycles) at a current density of 500 mA g–1 at room temperature, showing the promising future application prospects.
研究领域:
材料科学
·
电化学
·
能源存储
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）