ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Jian Xu,Zheng Dai,Rongrong Chen,Zhongyi Wang,Qi Liu,Jingyuan Liu,Jing Yu,Jiahui Zhu,Jun Wang
Surface icing and corrosion considerably reduce the operational safety of offshore wind turbines and can be mitigated through the use of lubricant-infused surfaces, which, however, often suffer from severe performance degradation under real-world conditions and lack long-term durability. Herein, this work prepares polyurea coatings based on a dynamic crosslinked phase-locked network and show that the alternating arrangement of strong and weak hydrogen bonds between the urea units facilitates the capture and storage of the liquid phase (silicone oil), while the affinity and associative interactions between this phase and polydimethylsiloxane segments ensure strong adhesion and integration. The best-performing coating exhibits good dynamic/static anti-icing properties (freezing delay time = 331 s, temperature of first ice nucleatio n = −24.6 °C, ice shear strength = 19.9 ± 3.3 kPa) according to the results of ice crystal growth simulations and wind tunnel tests while showing an exceptional anti-corrosion performance (low-frequency modulus (|Z| 0.01 Hz ) = 4.22 × 10 10 Ω·cm 2 ) and durability. Thus, this study presents a strategy for enhancing the ability of offshore wind turbines to withstand extreme environments and extending their service lifetimes.
研究领域:
材料科学
·
表面工程
·
可再生能源
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产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Yujie Wang,Xili Yan,Kenan Li,Siqi Li,Tao Ai,Fengrong Shi
Conventional epoxy asphalt is difficult to reuse due to its thermosetting inability to heal and reprocess. In this study, using dimer acid (DA) and zinc acetate (Zn(OAC) 2 ) as curing agent and catalyst, respectively, and the hydroxyl-ester bonds were introduced into the dynamic crosslinking network system of the asphalt, a highly compatible epoxy asphalt DEA with heat recovery performance was designed. On this basis, the effects of different contents of capped hyperbranched polyester HP102 on the mechanical properties, low-temperature properties, and compatibility of DEA were investigated. The results showed that the base asphalt was successfully grafted with hydroxyl and ester groups, and this chemical modification effect reduced the polarity between the asphalt phase and the resin phase, resulting in a notable improvement in the compatibility of DEA compared with commercially available epoxy asphalt. The introduced HP102 improves not only the low-temperature ductility of the material but also its structural presence of -COO- groups, which can be further used to realize the dynamic exchange and reorganization of hydroxyl-ester bonds, which contributes to the modulus relaxation of the material and enhances its mechanical properties and self-healing ability. The highly branched structure of HP102 increases the unoccupied space and undergoes stress relaxation, which contributes to the improvement of the low-temperature ductility of the material. In addition, the cyclic tensile test results show that the mechanical property recovery rate can reach 86.7 % when hot-pressing processed at 180 °C for 5 h, which confirms that the epoxy asphalt under the reversible covalent crosslinking network possesses non-negligible recycling potential, and provides an engineering application reference for the hot-pressing recycling of epoxy asphalt.
研究领域:
材料科学
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化学工程
·
道路工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Yun Hu,Ye Sha,Lei Chen,Yufeng Ma,Qin Huang,Meng Zhang,Puyou Jia,Yonghong Zhou
Dynamically cross-linked networks combine the characteristics of thermoplastics and thermosets, enabling reprocessability while maintaining covalent cross-linking. However,it still faces multiple challenges in practical applications. Here, we present a strategy for the development of tung oil-based dynamically cross-linked networks (PNMETs) through the introduction of primary amine to disrupt the physical cross-linking and chain entanglements. This approach allows for the achievement of tunable mechanical strength and toughness, self-healing, solid-state plasticity, and topological transformation. The resulting PNMETs demonstrate multiple stimulus responses in light, heat, microwave, and infrared radiation, and exhibit excellent recycling and self-healing capabilities without catalyst. Furthermore, the incorporation of multiwalled carbon nanotubes (MWCNTs) and nano Fe3O4 into PNMETs leads to the fabrication of electromagnetic interference (EMI) shielding materials that possess dual characteristics of dynamically cross-linked networks and EMI shielding performance. The resulting PNMETs/MWCNT@Fe3O4 composite, utilizing the topological network rearrangement of PNMETs, demonstrates shape memory behavior, recycling and self-healing properties under infrared radiation and voltage application conditions, while also exhibiting an EMI shielding effectiveness of 20-35 dB with a thickness of less than 1 mm, meeting the standards for commercial and civilian applications. The bio-based adaptable dynamically cross-linked networks and their composites with multiple stimulus response produced via a simple strategy hold significant potential for next generation electromagnetic shielding materials, suitable for industrial scale production.
研究领域:
材料科学
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化学工程
·
纳米技术
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 32
·13584-13590
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IF 3.288
Haopu Xie,Dekun Sheng,Yan Zhou,Shaobin Xu,Haohao Wu,Xinxin Tian,Yinglu Sun,Xiangdong Liu,Yuming Yang
Materials with self-healing abilities have gained tremendous attention in recent years but combing excellent mechanical performance and splendid self-healing capacity into a single polymer material is still a great challenge. In this study, a self-healing polyurethane (SHP) material was prepared by constructing a dynamic cross-linked network via quadruple hydrogen bonds formed from 5-(2-hydroxyethyl)-6-methyl-2-aminouracil (UPy). The mechanical properties of the materials could be conveniently tuned by adjusting the dynamic cross-linked density. The optimal sample, SHP-75, has excellent mechanical performance, showing high tensile strength (27.02 MPa), excellent stretchability (1300%), and prominent toughness (111.37 MJ m−3). Despite such great mechanical properties, SHP-75 exhibited superior self-healing abilities and could fully obtain its initial mechanical strength after repairing at 80 °C for 24 h. A self-healing conductive electrode was further constructed to demonstrate its application prospects in the field of sensing.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Rongmei Su,Pu Huang,Lin Gan,Shuiping Zhou,Xiaoan Li,Wei Li,Jin Huang,Yi He
Self-healing polyurethane elastomers with dynamic crosslinking networks are promising candidates for intelligent next-generation coatings. However, their constitutive relation shows conflicts between high mechanical performance and room-temperature self-healing, as well as recyclability. Here, a regulation strategy of a dynamic triple-crosslinked network in the hard domain was proposed to achieve multifunction enhancement via covalent borate ester bonds coupling noncovalent. The distribution and ratio of borate ester bonds, boron-nitrogen coordination bonds, and multiple hydrogen bonds were meticulously designed to balance fracture and reconstruction of the molecular network. The introduced borate ester bonds enabled the basic room-temperature self-healing and mechanical performance of polyurethane elastomers through molecule-level topological evolution. The designed boron-nitrogen coordination bonds and abundant hydrogen bonds provided external noncovalent reversible crosslinking networks, thus improving tensile strength and toughness as physical crosslinking points. The obtained polyurethane elastomers exhibited impressive light transmittance of 93%, a tensile strength of 41.07 MPa, elongation at break of 1673.20%, toughness of 166.74 MJ m −3 , and almost entirely room-temperature self-healing in 48 h. These polyurethane elastomers even maintained 90% of their original mechanical properties after suffering three recycles. This strategy may promote the practical application of intelligent self-healing polyurethane coatings in the automobile and flexible electronic industry.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yijie Liu,Jichi Zhang,Yuan Ji,Jiawei Cao,Sen Xu,Peng Luo,Jianpeng Liu,Lina Ma,Guolin Gao,Yadong Wu,Zaixing Jiang
3D printed polyurethane elastomers (PUEs) have gained widespread application across diverse fields due to their versatility and adaptability. However, in comparison to traditional PUEs manufacturing, 3D printed variants often exhibit inferior mechanical properties, rendering them susceptible to physical and chemical damage during use. This vulnerability significantly impacts their service life and overall reliability. Herein, we designed self-healing PUEs with reversible boronic ester bonds covalent adaptive network (3DP-PUE-xA) as igital light processing three-dimensional (DLP 3D) printing materials. A novel photocurable functional monomer (ABDBA) with boronic ester bonds as a dynamic crosslinker was synthesized. Complex structure was divided into DLP printable simple parts, successfully acquired through self-healing assembly. The optimal 3DP-PUE-3A possessed excellent self-healing property of 107.73 ± 5.29 %. Simultaneously, the damaged 3D printed structures could be restored to their original structure and function by heat treatment, greatly extending their service life. This study provided a crucial research direction for advancing the applications of self-healing materials and enhancing 3D printing technologies within the realms of materials science and manufacturing engineering.
研究领域:
材料科学
·
制造工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2024
·
IF 4.1
Le An,Rui Xiang,Heshan Bai
Vitrimers behave like traditional thermosets with good thermal and mechanical properties at service temperature, combined with thermoplastic behaviors above a specific temperature due to their dynamic cross-linked networks. However, there is a lack of effort in studying the mechanical properties of existing vitrimers, which are important for applying them in practical applications. The objective of this work is to experimentally investigate the tensile, compressive, flexural, torsional, and impact properties of a widely studied epoxy-based vitrimer through the various tests: tensile test, compressive test, three-point bending test, torsional test, and pendulum impact test. Since the vitrimer has the same chemical composition as conventional epoxy, all the mechanical tests mentioned above are also conducted on the epoxy for comparison. The results show that the vitrimer is comparable to the epoxy in tensile, compressive, flexural, and torsional properties, while its impact strength is substantially improved. Finally, the thermoplastic behaviors (i.e., reprocessing, recycling, reshaping) of the vitrimer are also studied.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2020
·Vol. 60
·期 5
·1054-1065
·
IF 1.917
Hui Peng,Min Lu,Hao Wang,Zhongzhou Zhang,Fucheng Lv,Mingjun Niu,Wanjie Wang
The properties and structure of silane crosslinked polypropylene (PP)/ethylene propylene diene monomer (EPDM) elastomer blends had been carried out. Fourier transform infrared spectroscopy and gel content tests were employed to evaluate the crosslinking reaction of PP/EPDM blends. Crosslinking efficiency of PP/EPDM blends was investigated using thermogravimetric analysis, differential scanning calorimeter, dynamic mechanical analysis, dynamic rheology, and tensile testing. Tan δ curves of silane crosslinked PP/EPDM blends exhibited an obvious “gel point” originated from the formation of dynamic crosslinking network. The blend corresponding to the “gel point” presented comprehensively improved mechanical properties. These results demonstrated that characteristic rheological parameters showed close correlations with key mechanical properties of silane crosslinked PP/EPDM blends. Scanning electron microscopy images illustrated that crosslinking had remarkably changed the morphologies of PP/EPDM blends. The large deformation mechanism of these blends had been suggested.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 5
·49767
·
IF 2.52
Chengtian Xiong,Xiaoqing Li,Hezhi He,Bin Xue,Yi Wang,Jiqian Li,Zhiwen Zhu
Due to the disadvantages of lower tensile strength and fracture toughness, the widely application of Ethylene-propylene-diene-monomer rubber (EPDM) has been limited. In this study, a thermally reversible healing EPDM based elastomer with H-bonding and Zn-based-bonding dynamic cross-link network was prepared. The influence of mole ratio of ATA/MAH on tensile strength and fracture energy of mEPDM 0 -xATA was investigated. The results showed that increasing the content of ATA brings about a gradual improvement in tensile strength of the mEPDM 0 -xATA. Especially when the mole ratio of ATA/MAH is 1, the fracture energy of mEPDM 0 -ATA is dramatically enhanced to 33.9 MJ/m 3 , which is best among the ratios studied in our research. After curing, the effect of ZnCl 2 content on tensile strength and fracture energy of mEPDM-ATA-nZn was also studied. Meanwhile, the uniaxial cyclic loading-unloading tensile test was used to study the viscous damping properties of mEPDM-ATA-0.4Zn, which showed reversible repair properties after heat treatment. The results of dynamic rheological measurement showed that the damping properties were improved.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
Applied Materials Today
·
2025
·
IF 6.9
Weiqiang Han,Xia Liao
In this work, we reported a facile approach for fabricating external catalyst-free poly (ethylene 2,5-furandicarboxylate)/poly (trimethylene carbonate) (PEF/PTMC) blend vitrimer through two-step reactive blending by the addition of 2,2-bis(hydroxymethyl) 2,2′,2″-nitrilotriethanol (BIS-TRIS) and N, N′-tetraglycidyldiaminodiphenyl methane (TGDDM) for the first time. This method breaks through the difficulties of the traditional preparation method of vitrimer materials that must require the addition of metal catalyst, thus realizing the concept of green chemistry. At the same time, it also breaks through the difficulty of poor compatibility in the traditional blend preparation methods. Swelling and FTIR tests confirmed the presence of the dynamic cross-linking structure consisting of PEF and PTMC chains, while rheological analysis shows that the formed cross-linked network in PEF/PTMC blend can significantly improve its melt strength and make it could be foamed by supercritical carbon dioxide. An expansion ratio about 10-fold and microcellular foam with a uniform cell morphology can be obtained for PEF/PTMC composite vitrimer when the PTMC content and the gel content was less than 20% and 50%, respectively. Moreover, PEFMC foams possess greater compressive strength than that of commercial PET foams, exhibiting excellent mechanical properties. TGA and tensile experiments revealed that PEF/PTMC composite vitrimer exhibited excellent mechanical performance and thermal stability. Meanwhile, PEF/PTMC composite vitrimer still maintain the ability of excellent reprocessability. This work provides a practical green method to guide the design of novel polymer blends with improved miscibility, mechanical properties and sustainability by a dynamic cross-linking network.
研究领域:
材料科学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Yueshan Li,Da Li,Weihao Yuan,Yibo Shen,Zhen Hu
Conventional epoxy resins have high cross-linking density and rigid molecular structures, which make them difficult to develop into flexible elastomers. Here, inspired by the cuticle of the marine mussel byssi, we incorporate reversible Fe3+–carboxyl cross-links into a cross-linked epoxy network through a transformation between chemical cross-links and physical cross-links to realize the construction of a dynamic cross-linked network in traditional epoxy resins. Dynamic cross-linking networks and long flexible chain segments endow the epoxy system with excellent stretchable properties. Carbon nanotubes coated with ferric oxide (Fe3O4) nanoparticles were synthesized and added to the epoxy system, reinforcing the epoxy system. The synergistic combination of the modified molecular structure and nanohybrid endows the epoxy system with 550% elongation at break, a tensile strength of 1.4 MPa, and the ability to respond quickly to an applied magnetic field. An ultrasensitive strain sensor was constructed from synthetic epoxy hybrid materials; the GF (strain coefficient) of the strain sensor was up to 344.32. This research will be beneficial in expanding the application range of traditional epoxy polymer materials in the emerging sensor field.
研究领域:
材料科学
·
化学工程
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Jianzhen Wu,Yijie Liu,Shengming Hua,Fanjun Meng,Qinglin Ma,Shuliang Song,Yuju Che
Building stimulus-responsive units in the hydrogel coatings remains challenging for film sensors consisting of alternated layers of inert substrates and hydrogel coatings. An interesting film sensor with a carboxymethyl starch-based hydrogel coating was developed here. The cross-linking networks of carboxymethyl starch play the roles of structure-constructing units and stimulus-controlling units simultaneously, endowing the coatings with thermal sensing and strain sensing capabilities. The dynamic cross-links formed via the boronic ester bonds are temperature-sensitive, releasing or consuming additional acid ions with temperature alteration, and also as primary networks give the hydrogel strength and stretchability with the assistance of semi-penetrated polyacrylamide chains. Therefore, as-prepared flexible film sensors can be used to detect the periodic changes of human temperature and small-scale motion with multiple working modes, discriminating the physical states related to human health. Moreover, this kind of starch-based coating is degradable in a strongly alkaline solution and the inert substrate layer can protect the skin from erosion caused by direct hydrogel-skin contact, and thereby the film sensor is human- and environmentally friendly. This work also proposes a strategy of building temperature-sensitive units in the film sensor via regulating the chemical networks, instead of tuning physical structures.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
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）