Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 15
·5769-5779
·
IF 6.482
Baowei Qiu,Long Ni,Xueqin Zhang,Yang Chen,Shengtai Zhou,Zhengguang Heng,Mei Liang,Huawei Zou
The properties of fiber–matrix interfaces are one of the most important factors that influence the performance of carbon fiber-reinforced polymer (CFRP) composites. Therefore, it is necessary to strengthen the interfacial adhesion between carbon fibers (CFs) and the matrix to obtain composites with excellent properties and meet the future demand for advanced composites. Inspired by Humulus scandens, graphene oxide (GO) was introduced on the surface of CFs to build a barb structure. The structure could achieve a mechanical interlock between CFs and the matrix to obtain good interfacial properties. Most remarkably, the bionic structure could not only effectively enhance the interfacial properties, but also deflect the direction of interfacial crack propagation as supported by detailed micro- and macro-characterizations. Compared with the original CFs, both the interlaminar shear strength (ILSS) and interfacial shear strength (IFSS) of treated CFs increased by 49.20% and 54.93%, respectively. Above all, this work verified that the bionic structure has a good effect on the interface, and paves a new path to explore the enhancement methods of the interface.
研究领域:
材料科学
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复合材料
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机械工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Biru Shi,Xiaoling Xu,Jiahui Zhong,Zhenyu Zhang,Haosen Ma,Yu He,Xinxin Tian,Yan Zhou,Xiangdong Liu,Dekun Sheng,Yuming Yang
Hot-melt adhesive (HMA) is commonly used in industrial manufacturing due to its ease of use. However, the direct factors that affect shear strength have been unclear in recent years, making it difficult to prepare hot melt adhesives with high shear strength, which are mostly lower than 6 MPa. In this study, three types of polyurethane HMAs, differing in the position of H-bond motifs, ureidopyrimidinone (UPy), were synthesized and characterized, the most central factor for shear strength, Young's modulus , was firstly found out and proved. Side-chain UPy provides better flexibility and more chain entanglement . The lap shear strength of SPU was about 13.48 MPa, which was the highest shear strength of PU HMA, and remained 73.4 % even after 4 cycles. Compared to the other two samples, the side-chain motifs improved the possibility of forming hydrogen bonds with adherends and increased chain mobility. This led to a more efficient wetting process and strengthened Young's modulus directly, enhancing adhesive property incomparably. This work provides a satisfactory method for achieving high shear strength in HMA.
研究领域:
材料科学
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化学工程
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聚合物科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Lianru Ma,Wei Wang,Qian Zhang,Yongrui He
To enhance the interfacial properties of carbon fiber reinforced polymer (CFRP) composites, a rigid–flexible interfacial structure was constructed by in situ growth of carbon nanotubes (CNTs) on the carbon fiber surface via chemical vapor deposition (CVD), followed by grafting polyether amines (PEA) with different molecular weights. The CNTs provided a rigid, high-modulus structure enhancing mechanical interlocking and surface area, while PEA introduced a flexible, tough segment capable of forming chemical bonds with the epoxy matrix. The synergistic effect of the CNTs and PEA significantly improved interfacial adhesion and stress transfer efficiency. Interlaminar shear strength (ILSS) and interfacial shear strength (IFSS) of the composites were increased by 44.3% and 51.4%, respectively, compared with untreated CF composites. Furthermore, the optimal molecular weight of PEA was identified, balancing the rigid reinforcement and flexible energy dissipation. This work provides a promising strategy for tailoring interfacial architecture in CFRP composites and offers insights into the design of advanced structural materials with high strength and toughness.
研究领域:
材料科学
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复合材料
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纳米技术
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高分子科学
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Jiajun Ma,Zongwei Guo,Shengtao Dai,Yannong Liu,Huiru Hu,Peikun Li,Lin Jin,Yuhui Ao
Inducing highly oriented 2D nanosheets to create a mussel-inspired interface phase on the carbon fiber (CF) surface to enhance its composites’ strength and toughness has become a great challenge. In this study, a novel coating was synthesized to induce the graphene oxide (GO) oriented distributed on the CF surface while constructing a biomimetic "Brick-and-Mortar" structural interface phase, which simultaneously promoted the strength and toughness of CF composites . Acting as a sizing agent, di-pyrene terminated PEG (py-PEG-py) facilitates abundant π-π* stacking interactions, and enables flexible chain segment motion during interface fracture of composites, as well as effectively improving the toughness of composites. Eventually, the formation of a superior mechanism on the CF surface results in remarkable properties for composites, including an interfacial shear strength (IFSS) of 99.3 MPa, interlaminar shear strength of 93.2 MPa, and flexural strength of 1430 MPa. The tensile strength and toughness increased to 1777 MPa and 45.0 MJm −3 , respectively. Simultaneously, the continuous thermal conduction pathway produced by the oriented attachment of GO on the CF surface increased in-plane thermal conductivity . The reinforcing mechanisms of the unique mussel-inspired coating were systematically investigated. This work opens up an effective and scalability avenue for obtaining high-performance CF composites.
研究领域:
材料科学
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复合材料工程
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界面化学
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高分子化学
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纳米材料学
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仿生材料
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力学性能
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热传导
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Shaoping Chen,Yachao Wang,Yaning Wang,Wenhao Fan,Jingyun Guo,Jie Chen,Yu Jiang,Rasha Abdullah Ahmed Al-Yusufi,Zuhair A. Munir
In addition to the thermal and electrical characteristics of the thermoelectric material , the energy conversion efficiency of TE devices is influenced by other factors including the interface resistance, which in turn is affected by chemical changes or mechanical failure. We have investigated the use of FeTe as an electrode for iodine-doped PbTe. The telluride of iron has CTE and work function values that match well with those of PbTe. The FeTe/PbTe contact was determined as ohmic in nature with low resistance. Contact resistance and shear strength values were determined over aging times of up to 400 h at 573 K and were found to be nearly unchanged. In contrast, samples in which Fe was used as electrode showed significant decrease in shear strength and a significant increase in joint resistivity over the same aging conditions. From the electrical and thermal characterization, the conversion efficiency of the FeTe/Pb 1.0004 Te 0.997 I 0.003 /FeTe single leg was determined as 4.678% for T h = 673 K and T c = 300 K.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Mingxuan Yu,Jiaqi Li,Mengyao Zhang,Xin Song,Chao Zhou,Li Liu,Guangfeng Wu
The inert nature of carbon fiber (CF) surfaces leads to inadequate bonding strength with resin matrices, thereby constraining the overall performance of its composite materials. Sizing agents are pivotal for enhancing the wettability and interfacial adhesion of CF surfaces. However, most linear-structured sizing agents fail to fulfill the interfacial performance requirements of composite materials. Inspired by the rhizome structure, a bio-based hyperbranched waterborne polyurethane sizing agent (WPU-M) with a hyperbranched structure was synthesized successfully to address this limitation. A key intermediate, polyether–polyester polyol (MEP), was first synthesized via the esterification of L-malic acid and polyethylene glycol (PEG). The hyperbranched architecture of WPU-M arises from the multifunctionality of L-malic acid, which facilitates the formation of a highly branched structure during the polyurethane synthesis. When WPU-M is applied to carbon fiber/epoxy resin (CF/EP) composites, its distinctive biomimetic rhizome structure significantly enhances its interfacial properties. Compared with the untreated composites, the interfacial shear strength (IFSS) and interlaminar shear strength (ILSS) increased by 71.20% and 39.16%, respectively. The biomimetic rhizome architecture of WPU-M not only effectively mitigated microscopic defects on the CF surface but also amplified the density of polar functional groups, thereby strengthening the intermolecular interactions between CF and EP. This study presents a novel approach for optimizing the interfacial design of high-performance carbon fiber composites.
研究领域:
材料科学
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聚合物复合材料
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表面工程
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仿生学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 9
·1528
·
IF 3.164
Zhenyu Wang,Huijun Guo,Hang Zhou,Xinfeng Ouyang,Di Jiang,Jianhua Li,Qipeng Guo,Jun Tang,Chuncai Yang
Herein, we report self-emulsifying anionic unsaturated polyester emulsions with different chain segments as novel sizing agents. The epoxy modified unsaturated polyester emulsions were synthesized via a self-emulsifying technique with no organic solvents. Emulsions were characterized by dynamic light scattering (DLS), Zeta potential, centrifuge, and cryo-scanning electron microscopy (Cryo-SEM). The results showed that the emulsions obtained were mono-dispersed nanospheres that had adequate colloidal stability. The maximum Zeta potential of the sizing agent is −52.88 mV. In addition, these emulsions were investigated as the sizing agents in order to improve interfacial adhesion between carbon fibers (CFs) and unsaturated polyester resin (UPR). Compared with the CFs sized with the commercial epoxy sizing agent, the interlaminar shear strength (ILSS) of CF/UPR composites from the CFs sized by these emulsion sizing agents with three different chain structures were enhanced by 25%, 29%, and 42%, respectively. The emulsion sizing agent composed of a flexible segment synthesized from adipic acid, neopentyl glycol, and maleic anhydride is most effective and can achieve the highest enhancement of the ILSS of CF/UPR composites.Keywords:carbon fiber;unsaturated polyester;sizing agent;ILSS
研究领域:
材料科学
·
高分子化学
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复合材料工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Mengyao Liu,Wenrui Yao,Hao Zheng,Hangqi Zhao,Ruoxi Shao,Haiyan Tan,Yanhua Zhang
Starch is a highly attractive carbohydrate in the production for the preparation of adhesives in recent years, due to its widespread availability, renewability, and abundance of reactive hydroxyl groups. However, the mechanical properties, hydrophobicity , self-adhesion, and particularly high energy efficiency are generally unsatisfactory for current starch-based adhesives. On this premise, starch was oxidized using Fenton's reagent in a "“one-pot cooking” process. The prepared oxidized starch was chain expanded by polyvinyl alcohol (PVA) and then cross-linked with a 10 % isocyanate (PM-200) to fabricate a starch-based adhesive (SFA) with a network crosslinked structure. SF 12 A 35% /2.5-55 adhesive shows significantly higher wet shear strength (1.18 MPa), a remarkable 94 % increase compared to SF 0 A 35% /2.5-55. The adhesive film also demonstrates both hydrophobicity (99° contact angle) and exceptional energy efficiency, with a DSC test revealing a notable 10 % elevation in energy efficiency. In addition, the crosslinked structure increases its molecular weight, thereby increasing its self-adhesion (Fig. S1). This study opens up new possibilities for the design and manufacture of multifunctional starch-based adhesives.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Naiqiang Wang,Xiaoqing Si,Baiqi Zhang,Jianwei Gao,Mingsheng Li,Tong Lin,Rui Li,Chun Li,Junlei Qi,Jian Cao
A novel sintered-joining of Al 2 O 3 and AlN is achieved for the first time using micro-Ag particle interlayers in air. In comparison with reactive air brazing , this method addresses the issue of reduced strength caused by air holes in brazed joints . Also, this sintered-joining method can be performed at a lower temperature (920 °C), improving the joint strength by relieving the residual stresses. The sintering effect of micro-Ag particles and their high density of dislocations promote the recovery and recrystallization of the Ag interlayer, as well as the interdiffusion of Ag and ceramic. Ag–O clusters formed at the interface can be embedded into oxygen vacancies on the ceramic surface, playing a key role in interfacial joining. By optimizing joining temperature, assembly pressure and holding time, a maximum joint shear strength of 85.2 MPa is achieved at 920 °C for 30 min with an assembly pressure of 1 MPa. This study successfully prepares Al 2 O 3 /AlN joints with excellent mechanical properties, providing a reliable foundation for the fabrication of power integrated circuits with efficient operation.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 15
·3812
·
IF 3.1
Shaohong Liu,Hairui Liu,Limin Zhou,Hao Cui,Manmen Liu,Li Chen,Ming Wen,Haigang Dong,Feng Liu,Wei Wang,Song Li
A novel AgCuTi brazing foil with a unique microstructure was developed, which could achieve strong vacuum brazing of Ti6Al4V (TC4) and sapphire. The brazing foil was composed of Ag solid solution (Ag(s,s)), Cu solid solution (Cu(s,s)), and layered Ti-rich phases, and had a low liquidus temperature of 790 °C and a narrow melting range of 16 °C, facilitating the defect-free joining of TC4 and sapphire. The sapphire/TC4 joint fabricated by using this novel AgCuTi brazing foil exhibited an outstanding average shear strength of up to 132.2 MPa, which was the highest value ever reported. The sapphire/TC4 joint had a characteristic structure, featuring a brazing seam reinforced by TiCu particles and a thin Ti3(Cu,Al)3O reaction layer of about 1.3 μm. The fracture mechanism of the sapphire/TC4 joint was revealed. The crack originated at the brazing seam with TiCu particles, then propagated through the Ti3(Cu,Al)3O reaction layer, detached the reaction layer from the sapphire, and finally penetrated into the sapphire. This study offers valuable insights into the design of active brazing alloys and reliable metal–ceramic bonding.
研究领域:
材料科学
·
焊接工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Xinyi Gui,Mingfen Zhang,Puhao Xu,Guiwu Liu,Qinhan Guo,Xiangzhao Zhang,Haining Meng,Guanjun Qiao
Reactive air brazing of Si 3 N 4 ceramic was successfully achieved by using Ag-CuO filler metal. The effects of CuO content on the wettability of Ag-CuO/Si 3 N 4 system and the shear strength of Si 3 N 4 /Si 3 N 4 joint were investigated, and meanwhile the interfacial behavior was analyzed and discussed. Moreover, the work of adhesion, interfacial energy, and electronic properties of Ag/Si 3 N 4 , Ag/CuO and Ag/SiO 2 interfaces were evaluated by first-principles calculations. The Ag-CuO/Si 3 N 4 system transforms from no-wetting into wetting due to the oxidation of Si 3 N 4 substrate and the formation of SiO 2 layer on the substrate surface. The maximum average joint shear strength of over 50 MPa is obtained as the CuO content is 8 at.%. Compared with the Ag(111)/Si 3 N 4 (0001) interface, the Ag(110)/CuO(001) and Ag(110)/SiO 2 (001) interfaces show stronger interfacial bonding due to the formation of Ag-O ionic bond, indicating that the addition of CuO and the formation of SiO 2 contribute to the enhancement of interfacial bonding.
研究领域:
材料科学
·
计算化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHARACTERIZATION
·
2022
·
IF 4.537
Z. Sun,X.X. Zhu,H.Z. Chen,L.X. Zhang
To address the excessive formation of brittle compounds when brazing TiAl alloys, a TiZrHfCoNiCu high-entropy brazed filler was developed to realize the brazing of TiAl/Ti 2 AlNb couples. The TiAl/Ti 2 AlNb brazed joints can be divided into 4 zones, i.e., 2 diffusion zones at the TiAl/braze filler, Ti 2 AlNb/braze filler interfaces and 2 zones divided inside the brazed seam. α 2 + γ-TiAl were the main reaction products formed at the TiAl/braze filler interface and α 2 + Ti 0.5 Al 0.12 Nb 0.38 were the main reaction products at the Ti 2 AlNb/braze filler interface. Effects of brazing temperatures on the interfacial microstructure and mechanical properties of the TiAl/Ti 2 AlNb brazed joints were investigated. When brazing at 1100°C/15 min, the highest shear strength can reach 157 MPa (room temperature), and 123 MPa (650°C) respectively. The relationship between the microstructure and the corresponding mechanical response were discussed in detail. This research can offer new insights on developing desirable brazing filler when joining TiAl and TiAl based alloys.
研究领域:
材料科学
·
焊接工程
✓ 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）