Journal of Materials Chemistry C
·
2019
·Vol. 8
·期 5
·1673-1678
·
IF 6.641
Zhangshuo Liu,Yu Zhang,Hao-Bin Zhang,Yang Dai,Ji Liu,Xiaofeng Li,Zhong-Zhen Yu
High-performance and flexible electrically conductive materials with satisfactory mechanical strength are vital in shielding electromagnetic interference (EMI) and radiation for portable electronics and wearable devices. Two-dimensional transition metal carbides/nitrides (MXenes) with remarkable metallic conductivity are considered as ideal candidates for ultrathin EMI shielding films, but their poor mechanical performances often impede their practical applications. Herein, we fabricate highly conductive MXene-based films with remarkable EMI shielding performance and excellent mechanical strength by enhancing the interfacial adhesion among the adjacent MXene nanosheets with multivalent aluminum ions. The tensile strength of the MXene film is significantly enhanced by 190% from 28.7 to 83.2 MPa with the introduction of aluminum ions and its conductivity is retained at 265 600 S m−1, exhibiting superior comprehensive performances to the previously reported results with other reinforcements. The strong and highly conductive MXene film with a small thickness of 39 μm exhibits one of the highest EMI shielding performances of over 80 dB in the X-band. This work provides a simple and efficient strategy for designing and fabricating high-performance MXene-based materials for efficient EMI shielding applications.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
Desalination and Water Treatment
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2024
·
IF 1
Yang Shen,Fatoye Sawyerr,Lunbo Xu,Shusu Shen,Xiaoji Zhou
The preparation of modified membranes utilizing the UiO-66 framework for wastewater filtration is regarded as one of the most promising approaches to wastewater treatment, owing to its high efficiency and cost-effectiveness. In this study, a post-modified MOF, UiO-66-RSA, was synthesized via the condensation reaction of UiO-66-NH 2 and 2,4-dihydroxybenzaldehyde. PVDF mixed matrix membranes (MMMs) were fabricated for the first time by mixing UiO-66-RSA into PVDF using the non-solvent induced phase separation (NIPS) method. Compared to pure PVDF membranes, the newly developed membrane, M4, demonstrated enhanced compatibility and superior mechanical strength. In dyeing wastewater treatment applications, M4 showed excellent separation efficiency for dye and heavy metal mixed wastewater, achieving rejection rates exceeding 90 %. Additionally, it maintained a high flux recovery rate (FRR > 90 %) and rejection rate (Rejection > 90 %) after six filtration cycles of dye-containing wastewater, indicating strong recyclability. These findings suggest that MMMs embedded with UiO-66-RSA hold significant promise for dyeing wastewater treatment.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Xiaojing Wang,Yiming Xu,Siyuan Xiang,Shengyang Tao,Wendong Liu
Supraparticles, formed through the self-assembly of nanoparticles, are promising contenders in catalysis, sensing, and drug delivery due to their exceptional specific surface area and porosity. However, their mechanical resilience, especially in dimensions spanning micrometers and beyond, is challenged by the inherently weak interactions among their constituent building blocks, significantly constraining their broad applicability. Here, we have exploited a robust supraparticle fabrication strategy by integrating hydrogel components into the assembly system and evaporating on the superamphiphobic surface. The resultant SiO2/SA (sodium alginate) supraparticles, achieved by evaporating a 15% volume fraction dispersion of SiO2 nanoparticles containing 18.46 mg/mL of sodium alginate and subsequently cross-linking with Ca2+, demonstrate mechanical robustness with a fracture force of 6.04 N, representing a mechanical strength enhancement of 60 times higher than that prior to the incorporation of the hydrogel component. The supraparticles maintain their original morphology after 30 min of ultrasonic treatment (200 W), demonstrating mechanical stability. This method exhibits generalizability, enabling the customization of supraparticles with various building blocks and hydrogel backbone materials. Based on such a methodology, we have synthesized enzyme-carrying supraparticles, further expanding the potential applications in intricate cascade reactions. The encapsulated glucose oxidase and horseradish peroxidase maintained their inherent reactivity, and such hydrogel-assisted robust supraparticles exhibited exceptional performance in accurate glucose assays, indicating great practical application in biocatalysis.
研究领域:
材料科学
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生物化学
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Jixiao Hao,Shuai Yan,Hua Yuan,Cong Du,Yeqiang Tan
Facing the severe problem of microplastic pollution, there is an urgent need to develop biodegradable fibers to replace the petrochemical fibers. Sodium alginate , a biomass polysaccharide , has gained widespread attentions recently for the fiber manufacture. However, the limited mechanical strength of alginate fibers restricts their usages as load-bearing fabrics and reinforcement fibers . Here, we develop a novel strategy to prepare alginate multifilaments using pre-crosslinked sodium alginate solutions. The increase in the pre-crosslinking ratio effectively hinders the disentanglement of sodium alginate chains at high stretches, causing an increase in the shear viscosity of the solution ascertained from the capillarity-driven thinning process from 4.5 Pa·s to 9.9 Pa·s and facilitating the high alignment and orientation of sodium alginate chains. The resultant fibers possess a breaking strength of 474 MPa, elongation at break of 16 %, Young's modulus of 14.4 GPa, and toughness of 51.8 MJ/m 3 , exceeding most biomass fibers without reinforcement additives. The high orientation degree of 0.865 and high spinnability of alginate multifilaments enable their applications in multi-channel encryption fabrics that exhibit distinct information under various optical conditions. This rheological regulation of spinning solutions provides a facile yet effective strategy to enhance the mechanical performance and broaden application scenarios of alginate fibers.
研究领域:
材料科学
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环境科学
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生物工程
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产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Jin Xu,Qirong Li,Jiugang Yuan,Xuerong Fan,Weidong Gao
Starch-based films suffer from brittleness and poor tensile properties, limiting their industrial applicability. In this study, magnetically modified starch (MMS) was prepared by covalently grafting azide-Fe 3 O 4 @SiO 2 nanoparticles onto the reducing ends of soluble starch via reductive amination and Cu(I)-catalyzed azide–alkyne cycloaddition (click chemistry). During film formation, application of a 1.4 T NdFeB magnetic field promoted chain alignment and crystallization. X-ray diffraction revealed a 19 % increase in crystallinity (from 9.6 % to 11.4 %), while FTIR analysis showed a 27 % enhancement in the (994 + 1047)/1022 ratio, indicating greater short-range molecular order. As a result, the tensile strength of MMS films increased to 19.8 ± 1.9 MPa, representing an 81.7 % improvement over native starch films (10.9 ± 1.4 MPa, p < 0.01). Meanwhile, the elongation at break decreased from 3.9 ± 0.8 % to 2.3 ± 0.3 %, reflecting enhanced molecular packing and reduced chain mobility. Superparamagnetic behavior ensured chain mobility only under field exposure, minimizing agglomeration after field removal. This work demonstrates a scalable, field-guided strategy to tailor starch film structure and performance, offering promising applications in eco-friendly packaging and biomedical materials.
研究领域:
材料科学
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食品科学
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高分子化学
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Hanqi Qian,Yue Yao,Qingyuan Cao,Tao Liu,Nan Li,Yudong Huang,Regina Maratovna Islamova,Bo Jiang
Developing coating materials, which are thermally insulating and high-strength support in extreme environments, is a hot spot for the thermal protection of aerospace. However, the lack of stable ceramic construction after prolonged thermal attack creates a risk of mechanical performance degradation. Herein, a silicon-based porous thermal protection composite was proposed by enveloping an innovative silicone resin on melamine frame. The thermostability of silicone resin was significantly improved by just 2 wt% addition of a multifunctional silane monomer, due to the incorporated diphenylamine and its derived quinonimine structure. Meanwhile, the uniform distribution of ammonium polyphosphate (APP) in the system effectively filled defects and cracks during pyrolysis. These facilitated the formation of an ordered porous polymer-derived ceramic framework under high temperature, thus significantly enhancing the material's mechanical strength (1200 °C, 3.39 MPa) and thermal insulation. Notably, even when subjected to prolonged high-temperature flame impact, the 3 mm-thick quinonimine-incorporated coating maintained its intact structure and preserved a backside temperature 77 °C lower than that of traditional silicone/melamine coating. This work provides a strategy for developing thermal protection composites that exhibit machinability, high strength, and superior thermal insulation performance in extreme environments.
研究领域:
材料科学
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航空航天工程
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 36
·17255-17265
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IF 3.553
Huang Jinxin,Zhang Wei,Li Heng,Yu Xiaogang,Ding Shuaiwen,Wu Chengwei
Biocompatible polydopamine–polyacrylamide (PDA–PAM) hydrogel has good self-healing performance. However, there is a trade-off between the self-healing ability and the mechanical strength. Excellent self-healing often results in the poor mechanical strength, which limits the application in load-bearing field. Here, we successfully prepare PDA–PAM hydrogels with improved strength and good self-healing properties simultaneously. By adjusting the pH and ammonium persulfate (APS) content of the hydrogel solution to promote dopamine (DA) polymerization, PDA–PAM hydrogel with a high content of polydopamine (PDA) is developed, which demonstrates excellent self-healing properties and mechanical strength. In particular, the PDA–PAM hydrogel with high PDA content (DA/AM = 5%) has a tensile strength of 16 kPa and the tensile strength spontaneously recovers 96% in 2 h after the tensile fracture. The obtained hydrogel also displays good biocompatibility.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Ying Qi,Shaojian Lin,Jianwu Lan,Yifei Zhan,Junling Guo,Jiaojiao Shang
A transparent versatile cellulose platform film was prepared from Eucalyptus pulp in this work. Based on such cellulose platform, multifunctional cellulose films with ultraviolet-shielding, photochromism, and strong mechanical strength were fabricated via nucleophilic postmodification strategy by introducing a versatile spiropyran moiety into cellulose molecules. The fabricated cellulose films exhibited super-high transmittance up to 96% and performed notable ultraviolet-shielding capacity at 200–400 nm. Moreover, the photochromic performance of cellulose films with color changes could be clearly observed by the naked eyes, and the fluorescent blue could be excited. Besides, the tensile stress of multi-functional cellulose film was about 80 MPa, which was almost 8 times stronger than that of the commercial polyethylene film at the same thickness. It is noteworthy that these superior performances promote such a cellulose platform to be a versatile precursor for fabricating various multi-functional cellulose used in the fields of out-door coating, transparent packaging, optical screen, etc .
研究领域:
材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 28
·7619-7625
·
IF 5.976
Yongqi Yang,Lin Guan,Haicheng Jiang,Lijie Duan,Guanghui Gao
Ink-free printing based on photochromism has attracted great attention as a new generation of printing technology. However, the current photochromic materials are limited due to slow response and high cost. In this investigation, a rapidly responsive photochromic hydrogel with high mechanical strength was explored through the introduction of cheap ammonium molybdate into gelatin and hydrophobic associative polyacrylamide. The photochromic hydrogel exhibited excellent mechanical strength of 750 kPa and a rapidly responsive photochromic process of 5 seconds with UV light irradiation. Moreover, the hydrogel could withstand long elongation and high compressive stress with shape recovery ability. The rapid photochromic properties gave hydrogels with fast and easy “printing” performance. More importantly, the “printed” text or pattern in hydrogels could be erased at 70 °C in an oxygen environment. In addition, the hydrogel could be written on in characters by using reducing reagents. Photochromic hydrogels with ink-free printing ability would demonstrate a new design strategy for soft materials with low-cost, rapid response and high mechanical properties.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Shenglei Feng,Fupo He,Jiandong Ye
In this study, for the first time honeycomb β-tricalcium phosphate (β-TCP) scaffolds were fabricated through an extrusion technique. The physicochemical properties and cell behaviors of the honeycomb β-TCP scaffolds were investigated. The results showed that scaffolds were characterized by ordered channel-like macropores and unidirectional interconnection. The pore structure and mechanical strength could be tailored by changing the parameters of extrusion molds. The pore size of scaffolds was in the range of 400–800 µm approximately, while their compressive strength parallel to the pore direction and porosity ranged from 14 to 20 MPa and 60–70%, respectively. The in vitro cell behavior demonstrated that cells could well attach on the surfaces and grow into the inner channel-like pores of the scaffolds; the scaffolds with higher porosity showed better cell proliferation but poorer cell differentiation. The honeycomb scaffolds fabricated by extrusion technique are potential candidate for bone tissue engineering.
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
Advanced Composites and Hybrid Materials
·
2021
·Vol. 5
·期 1
·104-112
·
IF 5.693
Cao Shan,Ge Wenjiao,Yang Yang,Huang Quanbo,Wang Xiaohui
Graphene paper with good mechanical strength, flexibility, and high conductivity is an emerging functional material for wide applications, but its feasible and scalable preparation remains a challenge. Herein, a high strength, flexible, and conductive graphene/polypropylene (PP) fiber paper was prepared by a traditional papermaking process. In the composite paper, graphene nanosheets were well stabilized on the PP fibers forming a stable three-dimensional conductive interleaved network. Chitosan was found able to build a polar active interface on PP fibers and graphene nanosheets, which can not only promote PP fiber dispersion in water yielding a uniform pulp, but also favor the retention of graphene in the composite paper. As a result, the composite paper presents high strength (15.32 MPa), good conductivity (11,995 S/m), shielding effectiveness (31.1 dB), water resistance, fungi-proof, and thermal conductivity (10.17 W m −1 k −1 ) properties. This work demonstrates the feasibility of large-scale preparation of graphene composite paper with commercial synthetic fibers through a traditional papermaking process, and expands the potential industrial application of graphene materials. Graphical abstract Graphene/chitosan co-aggregates were absorbed on the surface of graphene/chitosan/PP fiber under the electrostatic interaction of CPAM to form graphene/PP fiber.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 48
·27415-27423
·
IF 12.732
Xin Zhang,Cheng Liu,Xinxin Zhang,Yang Si,Jianyong Yu,Bin Ding
Advanced ceramic aerogels with ultra-strong mechanical properties and excellent fire resistance are critically required as heat insulators under extreme conditions. Nevertheless, the current use of ceramic aerogels is usually restricted to their brittleness and structural collapse under transient high-temperature environments. Herein, we demonstrate an efficient and scalable method to design a novel lamellar structured ceramic nanofibrous aerogels with ultra-high mechanical strength, superior shear resistance, high elasticity, and good fire resistance through combining silica nanofibers with aluminoborosilicate (AlBSi) matrices. The obtained SiO2 nanofibrous aerogels (SNFAs) show comprehensive performances of quick recovery from 60% compressive strain, ultra-high strength of beyond 160 kPa at 60% compressive strain, shear strength as high as 21 kPa at 20% recoverable strain, superior compression and shear fatigue resistance, and invariable high elasticity independent of temperature. Furthermore, the trait of the all-ceramic ingredient endows SNFAs with high-temperature tolerance (the maximum temperature up to 1100 °C) and heat insulation performance (the thermal conductivity of 0.0389 W m−1 K−1 at 25 °C). The innovative fabrication of the promising material is likely to offer new perspectives to make ceramic aerogels an ideal material for thermal superinsulation under drastic circumstances.
研究领域:
材料科学
·
热力学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）