EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Minhui Wang,Jiahui Zhou,Xiaolin Jiang,Yeming Sheng,Min Xu,Xun Lu
Self-healing materials have attracted considerable attention because of their sustainable property of prolonging service life and reducing resource consumption. However, as plenty of room-temperature self-healable materials have been studied, it still remains a great challenge to equip these materials with admirable mechanical strength since there is a compromise between intermolecular interactions and chain mobility. Herein, a novel strategy of integrating self-healing ability with robustness in polymeric elastomer at ambient condition was developed. The synthesized polyurethane was equipped with multiple reversible interactions including disulfide bonds, oxime urethane bonds, H-bonds and coordination interactions, and formed triple cross-linking network. What’s important is that Cu 2+ could not only act as the coordination center, but also serve as the catalyst to accelerate disulfide exchange and oxime urethane exchange reaction. XPS and stress relaxation tests revealed that the introduction of CuCl 2 reduced the relaxation activation energy of both the disulfide metathesis and oxime urethane exchange reaction. Thanks to the multiple interactions design and the effects of Cu 2+ , the elastomer was endowed with excellent mechanical strength of 19.5 MPa and self-healing efficiency of 83% at room temperature.
研究领域:
材料科学
·
聚合物化学
·
机械工程
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2025
·Vol. 27
·期 8
·2319-2330
·
IF 9.2
Yamei Zao,Muqiu You,Jieru Ma,Xiaoyu Du,Yongcan Jin,Dagang Li,Zhaoyang Xu,Chuchu Chen
Hydrogels are promising flexible substrates, yet their applications are always limited by their inferior mechanical robustness and lack of multifunctionality. Herein, inspired by flexible and robust molting crab shells, multifunctional ChMNF–PAA–ACC (CPA) hydrogels were developed by constructing a three-dimensional chitin micro-nanofiber (ChMNF) network with a layered structure, incorporated into an amorphous inorganic-based hybrid matrix of nano-segregated minerals (amorphous calcium carbonate, ACC) and protein-like acrylic acid (PAA) polymers. This preparation process enables a green and mild synthesis, employing sustainable ChMNF and ACC as biodegradable and biocompatible raw materials, with no need of complex treatments or costly functional agents. The resulting CPA hydrogels simultaneously feature high strength (∼28.6 MPa), optical clarity (high transmittance: ∼88.1%, low haze: ∼1.86%), good drying–swelling recycling properties, and intrinsic fluorescence and electrical conductivity, surpassing performances of most chitin fiber-reinforced gel materials. Owing to these merits, these CPA hydrogels can be assembled into multifunctional sensors to detect diverse external stimuli (such as strain, pressure, and temperature). Consequently, this dual bionic strategy provides an exciting idea for designing multifunctionally robust and transparent hydrogels, showing promising and sustainable potential in the application of flexible sensors.
研究领域:
材料科学
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生物医学工程
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化学工程
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2025
·
IF 7.3
Yanlin Zhu,Wen Zhou,Huimin Wu,Hanzhi Zhang,Xiangjian Meng,Xuehu Men
With the advancement of nuclear industry driving extensive applications of peelable decontamination coatings in nuclear facility decommissioning and emergency situations, current coatings face challenges in balancing cohesion-adhesion properties, as their high peel strength prevents complete removal from high surface energy substrates. In this work, a double crosslinking network strategy is developed, integrating flexible Poly(vinyl alcohol) (PVA) and chitosan polycondensation crosslinked long chains with rigid acrylic and acrylamide radical crosslinked short chains, synergistically enhancing waterborne peelable coating strength via energy dissipation mechanisms. At the same time, the complexation between -OH and -COO − groups on the molecular chain and Cs + is exploited to achieve efficient decontamination effect. The prepared peelable coating demonstrates some advantages, including multiple substrate applications with rapid curing rate, enhanced mechanical strength compared to single-crosslinked network coatings (with a tensile strength of 2 MPa and an elongation at break of 410 %), and low interfacial adhesion (with a peel strength <2.2 N/cm on cement surfaces). Remarkably, it achieves high decontamination efficiencies of 99.70 % on glass surfaces, 99.68 % on stainless steel surfaces and 92.40 % on concrete surfaces, while possessing robust solvent resistance. Therefore, the prepared decontamination coating has excellent potential with widespread application prospects in the field of radioactive surface decontamination.
研究领域:
核工程
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材料科学
·
放射性去污
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产品关联
DOI
高影响因子
Materials Today Bio
·
2025
·
IF 10.2
Song Chen,Dachuan Liu,Qianping Guo,Li Dong,Huan Wang,Jiaxu Shi,Weicheng Chen,Caihong Zhu,Weishan Wang,Wei Xia,Miodrag J. Lukic,Helmut Cölfen,Bin Li
Hydrogel-based materials exhibit great potential in tissue engineering. However, their mechanical weakness limits applications in hard tissue regeneration, especially under load-bearing conditions. Although various strengthening strategies have been applied, the achieved mechanical response of hydrogels still lags behind the mechanics of natural bone. In this study, we present a novel mineralization approach to fabricate mechanically robust and highly osteogenic mineralized hydrogels. Cross-linking between deprotonated chains of poly(acrylic acid) (PAA) and divalent cations has led to formation of hydrogels with a compressive strength and elastic modulus of 0.3±0.1 kPa and 1.3±0.2 kPa, respectively. Subsequent in situ formation of nano-calcium hydroxide crystals remarkably increased the compressive strength and modulus to 7.9±0.6 MPa and 339.3±31.4 MPa, respectively, surpassing those of trabecular bone. Moreover, the mineralized hydrogels demonstrated remarkable osteogenic potential in vivo, exhibiting immunoregulatory activity, promoting early angiogenesis, and accelerating fracture healing at weeks 4 and 8. The mechanism of osteogenesis was further revealed by transcriptome sequencing, indicating that the mineralized hydrogels regulated the translation of extracellular matrix and biomineralization. Overall, our study presents a pioneering and cost-effective method for fabricating materials with exceptional mechanical strength and strong osteogenic properties, offering a promising avenue for load-bearing bone repair applications of hydrogel-based materials.
研究领域:
生物材料学
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组织工程
·
骨科医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 16
·9747-9755
·
IF 10.7
Yue Wang,Jialiang Luo,Cao Yang,Lei Xiao,Gazi Hao,Suwei Wang,Wei Jiang
The three-dimensional (3D) printing technique is used to efficiently design the structure of 3D graphene assemblies and give them extraordinary properties. However, directly constructing 3D graphene assemblies with complex structures using direct ink writing (DIW) 3D printing is still limited. Herein, we demonstrate a strategy for directly constructing microstructurally porous or dense 3D reduced graphene oxide (RGO) frameworks with an octet-truss structure using embedded 3D printing combined with freeze-drying or capillary-drying, respectively. Reasonable structural design and self-assembled RGO sheets contribute to endowing RGO frameworks with mechanical strength and electrical properties. The freeze-dried RGO framework (F-RGF) has an electrical conductivity of 131.85 S m−1 and a compressive strength of 35.42 kPa at 50% strain. Moreover, the properties of the RGO framework are changed by altering its drying method. Compared with F-RGF, the capillary-dried RGO framework (C-RGF) has a higher electrical conductivity of 863.77 S m−1 and a higher compressive strength of 3.23 MPa. At a thickness of 2.8 mm, low-conducting F-RGF and high-conducting C-RGF exhibit good electromagnetic interference shielding effectiveness (EMI SE) in the frequency range of 18–40 GHz, with total SE (SET) values up to 72.87 dB and 63.48 dB, respectively. This work provides a reference for constructing 3D assemblies with multi-level structures and exhibits the possibility of structural changes for different applications.
研究领域:
材料科学
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电子工程
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Mingfei Li,Yujie Yang,Weifeng Jiang,Yi Yang,Jingcheng Hao
Waterborne polyurethanes (WPUs) have found extensive potential applications in industrial fields owing to their facile preparation and eco-friendliness. However, their relatively low hydrophobicity and mechanical strength normally make them nonideal for acting as protective coatings for solid surfaces, as well as adhesive materials for under-water operations. Here, we report one kind of WPU-based material synergistically modified with perfluoroalcohol and polysiloxane. The as-prepared WPU products can not only exhibit long-term colloidal stability after synthesis using a stepwise polymerization method but also readily be processed into functional coatings after directly spreading onto various solid substrates. The resultant polymeric thin films possess good thermal stability, strong hydrophobicity, and high mechanical strength. And all of these properties can be effectively tuned by controlling their internal silicon contents. The excellent hydrophobic and mechanical performances also enable them to act as efficient anticorrosive, antifouling, and under-water adhesive materials for solid surfaces. Our work may provide useful guidance for creating versatile and relatively clean polymeric coatings.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Chenrui Zhang,Qingchuang Lu,Meng Song,Zhenyang Luo,Lei Duan,Yanlong Luo
Many high-strength polyurethane materials have been developed in the past, but combining other functionalities such as high transparency, adhesion, and self-healing properties is still a great challenge. We prepare a mechanically robust polyurethane elastomer with high transparency and self-healability. The relationship between its structure and properties is elaborated. Acylsemicarbazide (ASCZ) and urethane groups are introduced into the hard segments of the polyurethane elastomer, and by modulating the spacer groups between the ASCZ and urethane groups, the fine modulation for the hydrogen bonding density and the hard domain size is realized. By the exquisite regulation of molecular structure, the HMDI-SPH elastomer with sebacic dihydrazide (SPH) as the chain extender, polytetramethylene ether glycol (PTMEG) as the soft segments, and methylene-bis(4-cyclohexyl isocyanate) (HMDI) as the isocyanate can achieve a high elasticity due to the rich and hierarchical hydrogen bonds. Such hydrogen bonds impede the crystallization of PTMEG and facilitate the formation of homogeneously distributed hard-phase microdomains. The HMDI-SPH elastomer exhibits good mechanical robustness (tensile strength of 45.7 MPa, toughness of ~140.8 MJ m −3 ), transparency (transmittance > 95%), and self-healing (self-healing efficiency of 86.6%). Meanwhile, HMDI-SPH has good adhesive strength on a variety of substrates such as walnut (~10.81 MPa) and steel (~14.60 MPa).
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
MATERIALS SCIENCE FORUM
·
2016
·
IF 0
Chag Ku Ding,Jing De Zhang,Ya Lei Liu,Jin Yan Gou,Jun Peng Luan
A comparative study has been carried out on the effects of pore-forming agents on the microstructural characteristics and properties including porosity, microstructures, linear sintering shrinkage and mechanical strength of NiO/yttria stabilized zirconia (YSZ). Different pore-forming agents (soluble starch, graphite and activated carbon) were incorporated into NiO/YSZ at various mass mixing ratios (5%, 10% and 15%). The experimental results show that under the condition of same content, sintered samples using activated carbon as pore-forming agent had a higher porosity than that with identical content of the other two kinds of pore-forming agents. Sintered samples with 10.0 wt% activated carbon had a porosity of 35%. Section morphologies show that pores distributed uniformly and connected very well in the anode with activated carbon as pore-forming agent. The mechanical strength of these sintered samples with carbon as pore-forming agent was also higher. With the activated carbon particle size decreasing (from 100 mesh to 320 mesh), the open porosity of porous NiO/YSZ was reduced (from 31.7% to 30.9%). It may be concluded that The activated carbon is the better choice as pore-forming agent for NiO/YSZ anode.
研究领域:
材料科学
·
燃料电池研究
✓ 已验证
DOI
Nano-Micro Letters
·
2023
·Vol. 16
·期 1
·1-13
·
IF 26.6
Lu Wenjiang,Deng Qixuan,Liu Minsu,Ding Baofu,Xiong Zhiyuan,Qiu Ling
A core-sheath structured coaxial composite fiber with highly aligned and densely stacked boron nitride nanosheets arrangements in the sheath was successfully fabricated.
The coaxial fibers have an ultrahigh axial Herman orientation parameter of 0.81, thermal conductivity of 17.2 W m −1 K −1 , and tensile strength of 192.5 MPa.
The coaxial fibers exhibit intensively potential applications in the wearable thermal management textile.
研究领域:
材料科学
·
纺织工程
✓ 已验证
DOI
高影响因子
RARE METALS
·
2024
·
IF 9.6
Li Zhao-Yang,Zhao Wei-Jun,Sun Yu,Zhou Bing,Feng Yue-Zhan,Liu Chun-Tai
The pressing demand for ultrathin and flexible shields to counter electromagnetic interference (EMI) has sparked interest in Ti 3 C 2 T x MXene materials due to their exceptional electrical conductivity, tunable surface chemistry, and layered structure. However, pure Ti 3 C 2 T x MXene films often lack the mechanical properties required for practical engineering applications, and traditional reinforcement methods tend to reduce electrical conductivity. This work demonstrates an effective strategy to enhance the alignment and densely packed layered structure of Ti 3 C 2 T x MXene films by regulating the acidity and alkalinity of Ti 3 C 2 T x MXene aqueous solutions. This approach simultaneously improves mechanical strength and electromagnetic interference shielding effectiveness (EMI SE). Compared with original Ti 3 C 2 T x MXene films, MXene films modified with ammonia solution (NH 3 ·H 2 O) via OH − show a significant improvement in tensile strength (27.7 ± 1.9 MPa). Meanwhile, MXene films treated with hydrochloric acid (HCl) via H + reach an even higher tensile strength of 39 ± 1.5 MPa. Moreover, the EMI SE values of the treated MXene films increase significantly, each reaching 66.2 and 58.4 dB. The maximum improvements in EMI SE values for the acid- and alkali-treated samples are 17.9% and 4%, respectively. In conclusion, the simultaneous enhancement of mechanical strength and EMI shielding efficacy highlights the potential of acid- and alkali-treated Ti 3 C 2 T x MXene films for applications in ultrathin and flexible EMI shielding materials. Graphical abstract
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Jie Cao,Yajun Wu,Liang Li,Miaomiao Hu,Yun Cheng,Hang Zhang,Jintang Guo
The mechanical strength of conventional hydrogels is inadequate for preventing leakage in high-temperature and high-salinity reservoirs, primarily due to the increased mobility of polymer chains and the degradation of crosslinked networks. Herein, we employed the strategy of ’network nesting and layer reinforcement’ to design a hybrid multi-site crosslinked hydrogel. This approach enhances the interconnections between polymer chains and fortifies the crosslinked network. The shear rheological behavior and temperature sensitive characteristics of the profile control working fluids were evaluated based on rheological dynamics. In the high temperature (140 ℃) and high salinity (21.81 × 10 4 mg/L) preparation environment, the effects of different components to the mechanical strength of the hydrogel were investigated under dynamic shear and uniaxial compression conditions. The incorporation of N-(hydroxymethyl)acrylamide (NMA) in the copolymerization with acrylamide (AM) resulted in an increase in the covalent cross-linking density, leading to a rise in the shear elastic modulus from 105 Pa to 238 Pa. The use of pre-gelatinized cassava starch (PGCM) as the grafting framework enhanced the bonding between the polymer chains, as evidenced by the increase in uniaxial compressive strength from 0.018 MPa to 0.081 MPa and the rise in peak strain from 55.0 % to 72.9 %. Furthermore, the synergistic effect of fumed silica (AEROSIL), which exploits mechanical coupling between inorganic nano-fillers and organic polymers, increased the compressive strength from 0.081 MPa to 0.418 MPa and raised the peak strain from 72.9 % to 81.8 %. It provides an effective approach to enhance the plugging performance of hydrogels in high temperature and high salinity reservoirs.
研究领域:
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Fiber Materials
·
2025
·
IF 21.3
Du Jiani,Li Tian,Li Jiatong,Tang Jingyuan,Zhang Runhua,Liu Yanan,Feng Jiamin,Meng Fanbin
Fabrics have attracted significant attention in the field of electromagnetic shielding due to their unique grid structure, high electrical conductivity, and flexibility. To enrich the research of textiles for microwave absorption, two-dimensional transition metal carbide (MXene)-enhanced reduced graphene oxide-based fabrics (MXene/RGO fabrics) were synthesized in this paper by using wet spinning–ionic cross-linking–chemical reduction strategy. MXene/RGO fabrics achieve a minimum reflection loss of − 58.3 dB at 17.6 GHz and a thickness of 2.4 mm, with an effective absorption bandwidth of 4.92 GHz. In addition, the combination of electromagnetic finite element simulation technology and test results was used to further elucidate the response mode and loss mechanism of MXene/RGO fabrics. The MXene/RGO composite fibers exhibit a tuned attenuation ability and impedance matching performance, which is attributed to the increased polarization relaxation loss caused by the large number of heterogeneous interfaces between RGO, MXene, and TiO 2 particles, as well as the appropriate electrical conductivity (16.6 S/cm). MXene/RGO fibers exhibit excellent microwave absorption performance, mechanical strength (534 MPa), easy modification, and fatigue resistance, promising stable absorption of electromagnetic waves in complex environments, thereby expanding the application scenarios of fabrics in the field of microwave absorption. Graphical
研究领域:
材料科学
·
电磁学
·
纺织工程
✓ 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）