COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2021
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IF 7.664
Senmao Yu,Zhenghai Tang,Shifeng Fang,Siwu Wu,Baochun Guo
Carbon black (CB) is a principal filler in rubber industry due to its excellent reinforcing effect and low-cost. It is of significant importance but challenging to modify the inert CB for addressing the dilemma of increased energy loss raised by the addition of CB. In this work, we reported the functionalization of CB through redox polymerization of rhodanine on its surface, and utilized the modified CB as a novel reinforcement for natural rubber (NR). Polyrhodanine coated on CB can covalently couple with NR chains by capturing macroradicals and serve as an intelligent interfacial bridge between CB and NR, which greatly improves CB dispersion and strengthens interfacial adhesion in the composites. As a consequence, the energy loss of the resultant composites is remarkably decreased, showing great advantages in reducing the rolling resistance and heat build-up for tire applications.
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Nature Photonics
·
2025
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IF 32.9
Tang Xiaodan,Yang Chenglin,Xu Yafeng,Xia Jianxing,Li Bo,Li Miao,Zhou Yuanyuan,Jiang Lulu,Liu Hairui,Ma Kunhui,Yu Qiao,Dong Bitao,Liu Yuhang,Mohammed Omar F.,Zheng Xiaopeng
Defective and mechanically weak interfaces substantially undermine both the efficiency and stability of perovskite solar cells (PSCs). Here we introduce a linear polymer, heparin sodium, as a multifunctional interface bridge layer in n–i–p PSCs. Unlike commonly employed small-molecule interface modification/passivation materials, heparin sodium features functional groups and ions including COO − , SO 3 − and Na + distributed along the top and bottom sides of its backbone. It thus serves as a bridge connecting the SnO 2 electron transport layer and the perovskite film through robust chemical bonding, mitigating defects and enhancing heterointerface bonding in PSCs. The power conversion efficiency (PCE) of the resulting rigid devices is 26.61% (certified 26.54%), positioning it among the highest-efficiency PSCs. We also fabricate flexible SnO 2 /heparin sodium-based PSCs that achieve a PCE of 25.23%. The heparin sodium-based devices demonstrate excellent operational and thermal stability. After 1,800 h under maximum power point tracking under simulated 1-Sun conditions, 94.9% of the initial PCE is retained. The devices also maintain 95.2% of their initial PCE after ageing at 85 °C for 1,800 h.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-8
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IF 17.694
Wan Sijie,Li Xiang,Chen Ying,Liu Nana,Wang Shijun,Du Yi,Xu Zhiping,Deng Xuliang,Dou Shixue,Jiang Lei,Cheng Qunfeng
Titanium carbide MXene combines high mechanical and electrical properties and low infrared emissivity, making it of interest for flexible electromagnetic interference (EMI) shielding and thermal camouflage film materials. Conventional wisdom holds that large MXene is the preferable building block to assemble high-performance films. However, the voids in the films comprising large MXene degrade their properties. Although traditional crosslinking strategies can diminish the voids, the electron transport between MXene flakes is usually disrupted by the insulating polymer bonding agents, reducing the electrical conductivity. Here we demonstrate a sequential densification strategy to synergistically remove the voids between MXene flakes while strengthening the interlayer electron transport. Small MXene flakes were first intercalated to fill the voids between multilayer large flakes, followed by interfacial bridging of calcium ions and borate ions to eliminate the remaining voids, including those between monolayer flakes. The obtained MXene films are compact and exhibit high tensile strength (739 MPa), Young’s modulus (72.4 GPa), electrical conductivity (10,336 S cm −1 ), and EMI shielding capacity (71,801 dB cm 2 g −1 ), as well as excellent oxidation resistance and thermal camouflage performance. The presented strategy provides an avenue for the high-performance assembly of other two-dimensional flakes.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Li Chen,Cailong Zhou,Luxi Tan,Wei Zhou,Huizhen Shen,Chenyang Lu,Lichun Dong
A key challenge in polyamide (PA) based nanocomposite membranes is to achieve non-accumulation filler and defect-free features, based on proper compatibility and great dispersion between the particles in the matrix. To address this issue, herein, an interfacial bridging strategy was introduced to fabricate the nanocomposite membrane. A covalent organic framework (COF), TAPB-BPTA (TAPB = 1,3,5-tris(4-aminophenyl)benzene and BPTA = 1,4-benzenedicarboxaldehyde), containing alkynyl was synthesized by a microwave-assisted solvothermal route and preliminarily grafted with the cysteine (CYS) bridge via a click reaction. Furthermore, the short chain of amine moieties in TAPB-BPTA not only makes more amine groups and carboxy groups in the COF pore wall, thereby elevating its hydrophilicity and improving its dispersion in the polyethyleneimine coating solution, but also presumably brings further free motion for amine groups to react with acyl functions in trimesoyl chloride (TMC). The COF was copolymerized using TMC to finally obtain the crosslinked top skin layer without the defect formation between filler and polymer during the interfacial reaction. The pure water permeance of the optimized nanocomposite membrane is higher than that of the pristine PA membrane. Accordingly, the optimized membrane exhibited good permeability and competitive selectivity for dyes and antibiotics. Meanwhile, it had a highly rejection of 92% for methylene blue after multi-cycle separation test, showing excellent industrial wastewater treating capability.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
DOI
高影响因子
Research
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2025
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IF 10.7
Miao Sun,Xin Wang,Yuan Yu,Meichen Li,Meng Wang,Wenbo Zhang,Zhaolin Yang,Jiazuo Zhou,Haiyue Yang,Chengyu Wang
Solar-driven interfacial evaporators represent a promising technique to address the energy crisis and freshwater scarcity issues. However, simultaneously achieving both high evaporation efficiency and long-term stability in a single evaporator system under multifactorial environmental conditions remains challenging. Herein, inspired by the anisotropic channel structure of wood, a novel evaporator featuring a vertical channel structure and excellent photothermal conversion performance for evaporation is developed through the covalent-bond bridging of MXene–polydopamine–cellulose nanocrystals. Polydopamine-modified MXene acts as a photothermal material, exhibiting excellent photothermal conversion efficiency. The vertical channels endow the evaporator with efficient thermal management and rapid mass transfer capabilities to dynamically balance the feedwater supply and photothermic energy input. Thereby, the evaporator exhibits an enhanced evaporation rate of 2.29 kg m −2 h −1 , accompanied by a remarkable 97.34% evaporation efficiency under 1-sun illumination. Additionally, the evaporator possesses a mechanical strength as high as 0.454 MPa, which ensures its long-term stability. Over 14 d of testing, stable evaporation rates of 2.27 kg m −2 h −1 were maintained over 8-h cycles with no salt crystallization. This work introduces a novel evaporator design with a strong evaporation capability, which has potential applications in addressing the energy crisis and water scarcity challenges.
研究领域:
材料科学
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纳米科技
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能源工程
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环境工程
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高分子化学
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光热转换
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可持续技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Xuan Zhang,Wenbin Huang,Jianyong Yu,Cunyi Zhao,Yang Si
Elastic ceramic aerogels are exceptionally suitable for thermal insulating applications, but lacking multi-mechanical synergistic high strength remains a deficiency. Inspired by the robust protective shells of mollusks in nature, which feature distinct hierarchical ordered structures, exhibiting strong and tough mechanical properties, a system construction and structural governing strategy is proposed to allow the nanostructure to assemble strong and flexible ceramic aerogels. Through the design of a hierarchical multi-arched structure configurated binary-soldering-assemble interfacial topology interlocking, concentrated stress is effectively discrete. This biomimetic strategy enables the effective dissipation of mechanical energy, resulting in ceramic aerogels with exemplary compressive resilience, bendability, tensile resistance, and their strength exceeding that of other nanofibrous aerogels by up to tenfold. Additionally, the flexible aerogels also show remarkable thermal resistance from −196 to 1100 °C and superior thermal insulation capabilities (39.72 mW m −1 K −1 ), making them more suitable for the applications.
研究领域:
材料科学
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机械工程
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热能工程
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仿生学
✓ 已验证
产品关联
DOI
高影响因子
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