iScience
·
2022
·
IF 6.107
Yufei Wang,Zhengzhi Mu,Zhiyan Zhang,Wenda Song,Shuang Zhang,Handong Hu,Zhe Ma,Liewei Huang,Dashun Zhang,Ze Wang,Yujiao Li,Binjie Zhang,Bo Li,Junqiu Zhang,Shichao Niu,Zhiwu Han,Luquan Ren
Weak interfacial activity and poor wettability between fiber and matrix are known to be the two main factors that restrict the mechanical properties of carbon fiber-reinforced composites (CFRCs). Herein, inspired by high strength and toughness characteristics of wing feathers of Black Kite ( Milvus migrans ), natural hook-groove microstructure system (HGMS) and underlying mechanical interlocking mechanism were carefully investigated. Biomimetic HGMS based on dopamine-functionalized carbon fibers and ZnO nanorods were constructed successfully by a two-step modification method to enhance interfacial adhesion. Further, CFRCs featured with biomimetic HGMS were prepared by a vacuum-assisted contact molding method. Experimental results confirmed that flexural strength and interlaminar shear strength of the bioinspired CFRCs were effectively improved by 40.02 and 101.63%, respectively. The proposed bioinspired design strategy was proved to be flexible and effective and it was anticipated to provide a promising design approach and facile fabrication method for desirable CFRCs with excellent mechanical properties.
研究领域:
材料科学
·
仿生学
✓ 已验证
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2025
·
IF 3.2
Yong Wang,Yanqin Shi,Haojie Li,Meng Ma,Si Chen,Yulu Zhu,Huiwen He,Xu Wang
Epoxy adhesive is becoming increasingly widely used in industry and daily life. There are many requirements to adhere to high and low polar interfaces simultaneously. In this work, a high polar epoxy resin, N , N -bis(4-(oxiran-2-ylmethoxy) phenyl) adipamide (BOYPA), was designed and prepared. The relationship between the curing temperature and the curing time and the curing reaction kinetics equations of BOYPA and Bisphenol A diglycidyl ether (DGEBA) with diethylenetriamine (DETA) was clarified by the study of the curing kinetics according to the Kissinger equation and the Crane equation. Compared with DGEBA, BOYPA required higher curing activation energy and had a lower curing reaction rate. The curing reaction of BOYPA and DGEBA was both a simple curing reaction. Moreover, the peel strength between the PP film and PA6 board bonded by the mixture of BOYPA and DGEBA could be obviously enhanced with the increase of BOYPA content due to the proper polarity and the formation of hydrogen bonds. Meanwhile, the impact strength of the mixture of BOYPA and DGEBA was significantly improved because of the good toughness of BOYPA. As a result, this work provided a simple method for regulating the bonding properties of epoxy adhesive for different adherent surfaces.
研究领域:
材料科学
·
高分子科学
·
胶粘剂技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Jinming Liu,Yiyu Cao,Haiming Chen,Haohao Lin,Dongsheng Mao
A robust and highly responsive pressure-sensitive adhesive (PSA) holds significant importance in interface interaction technology, requiring specific attributes such as a low modulus for surface adhesion, high strength to withstand stress, and responsiveness to external stimuli. However, achieving these requirements is often challenging due to structural limitations. In this study, a series of supramolecular ionogels with quadruple hydrogen bonding cross-linked networks and mobile ions were developed to decouple the modulus-strength relationship, thereby enhancing sensing performance. The quadruple hydrogen bonds cross-linked supramolecular networks exhibit good strength even with an increased ionic liquid content of up to 30 wt %. As a result, impressive lap-shear strengths of 2165.1 kPa on aluminum and tacking bond strengths of 1842.6 kPa on glass were attained, surpassing most of the literature-reported values. Additionally, the movement or orientation of ions under voltage application led to a 69.5% enhancement in the bonded strength. Moreover, the PSA demonstrated stress sensing capabilities, achieving a sensitivity of 32.2 MPa–1 in lap-shear applications and 9.5 MPa–1 in compression scenarios.
研究领域:
材料科学
·
聚合物化学
·
粘附科学
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2020
·
IF 3.693
Lu Shaoping,Zhu Lin,Wang Qilin,Liu Zhao,Tang Chen,Sun Huan,Yang Jia,Qin Gang,Sun Gengzhi,Chen Qiang
Natural protein-based hydrogels possess excellent biocompatibility; however, most of them are weak or brittle. In the present work, high strength hybrid dual-crosslinking BSA gels (BSA DC gels), which have both chemical cross-linking and physical cross-linking, were fabricated by a facile photoreaction-heating process. BSA DC gels showed high transparency (light transmittance of ~90%) and high strength. At optimal conditions, BSA DC gel exhibited high compressive strength (σc,f) of 37.81 ± 2.61 MPa and tensile strength (σt,f) of 0.62 ± 0.078 MPa, showing it to be much stronger than physically cross-linked BSA gel (BSA PC gel) and chemically cross-linked BSA gel (BSA CC gel). More importantly, BSA DC gel displayed non-swelling properties while maintaining high strength in DI water, pH = 3.0, and pH = 10.0. Moreover, BSA DC gel also demonstrated large hysteresis, rapid self-recovery, and excellent fatigue resistance properties. It is believed that our BSA DC gel can potentially be applied in biomedical fields.
研究领域:
材料科学
·
生物医学工程
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Hao Tong,Hang Chen,Yali Zhao,Miaomiao Liu,Yi Cheng,Jie Lu,Yehan Tao,Jian Du,Haisong Wang
Ideal adsorption material with large adsorption capacity, strong mechanical strength and satisfied reusability plays crucial role in efficient industrial wastewater treatment and oil-water separation. Herein, porous reduced graphene oxide/poly(ethyleneimine)/polydimethylsiloxane (rGO/PEI/PDMS) sponge with robust structure was proposed under mild conditions. Owing to the enhanced interfacial interaction between rGO and PDMS when employing PEI as adhesion layer, the rGO layer was tightly stacked onto the surface of porous channels within PDMS skeleton. Compared to the pristine PDMS sponge, the water contact angle, maximum adsorption capacity towards chloroform and compressive strength at 60% strain of the champion rGO/PEI/PDMS sponge were effectively increased from 101°, 7.38 g/g and 35.82 kPa to 135°, 16.38 g/g and 111.78 kPa, respectively. The porous rGO/PEI/PDMS sponge also demonstrated good adsorption capacities towards various substrates, including organic solvents (carbon tetrachloride, chloroform, dichloromethane , dimethylformamide , n-hexane, petroleum ether, and toluene) and oils (pump oil, silicone oil soybean oil). The rGO/PEI/PDMS sponge was further assessed as oil/water separation material, displaying high efficiency and good selectivity to the representatives of both heavy and light oils. More importantly, the resultant sponge delivered excellent recyclability without obvious attenuation of adsorption capacity at least 60 cycles. This work proposed a perspective for rational designing and fabricating efficient adsorbent with robust structure and durability in practical application.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 29
·11490-11498
·
IF 0
Lisheng Zhang,Miaoming Huang,Ruilei Yu,Juncheng Huang,Xia Dong,Ruoyu Zhang,Jin Zhu
One of the obvious shortcomings of bio-based shape memory polyurethanes (Bio-SMPUs), which usually use natural oil based polyols as the soft segment, is their low mechanical strength because the long dangling chains (six to eight carbons) in these polyols prevent the Bio-SMPUs from deep micro-phase separation, and consequently deteriorate their mechanical properties. In this work, we prepared a bio-based polyester diol for the soft segment, in which short side chains (CC) were used to tune the transition temperature and the morphology of the Bio-SMPUs. The moderate concentration of short branch chains barely affects the micro-phase separation, and the mechanical properties of the Bio-SMPUs are quite satisfactory. With the same 70 wt% soft segment content, the tensile strength in this work is 13.2 MPa, while the one using ricinoleate-based soft segments reported 2.8 MPa. Through proper shape memory programming, the synthesized Bio-SMPUs show good shape memory properties with a shape fixing rate of greater than 98% and a shape recovery rate of 85% in the first cycle and greater than 90% in the following cycles. This study provides a framework for developing bio-based SMPUs with high mechanical and good shape memory properties at the same time.
研究领域:
材料科学
·
聚合物化学
·
生物降解材料
✓ 已验证
产品关联
DOI
COMPOSITES PART B-ENGINEERING
·
2017
·
IF 4.727
Xi Ren,Shumin Peng,Wei Zhang,Chunwang Yi,Yuan Fang,David Hui
In this study, a series of adipic acid-polyoxypropylene diamine copolymer (AA-PPA) was prepared by copolymerizing polyoxypropylene diamine (PPA D400) and adipic acid (AA). The AA-PPA with weight-average molecular weight ( M w ) = 10400 and weight-average molecular weight ( M n ) = 7600 was used to modify diglycidyl ether of bisphenol A (DGEBA) epoxy/diethyl toluene diamine (DDM) system. This extended polyether AA-PPA showed unique advantages over traditional polyether at achieving the synchronous enhancement of strength and fracture toughness . With 30 wt% AA-PPA, the bending strength , tensile strength , elongation at break and impact strength were improved by 7.50%, 6.90%, 36.13% and 288.00%, respectively. The single glass transition temperature ( T g ) step proved the homogeneous phase structure of modified epoxy resins. Inevitably, the T g of modified epoxy decreased for the addition of soft segments. The dynamic mechanical analysis (DMA) results indicated that the storage modulus of modified epoxy increased with the increasing content of AA-PPA, while the loss modulus decreased. The interaction of the crosslinked network was explained by calculating the theoretical and measured values of the molecular weight between the crosslinks. The morphology showing the ductile fracture of modified epoxy was testified by scanning electron microscopy (SEM).
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
You-Yong Wang,Yuan-Qing Li,Shan-Shan Xue,Wei-Bin Zhu,Xiang-Qian Wang,Pei Huang,Shao-Yun Fu
Development of lightweight structural materials from fast-growing bamboos is of great significance to building a sustainable society. However, previously developed structural bamboos by delignification combined with densification would easily fail under large external loading after exposure to water due to structure collapse, severely limiting their practical applications. Here, we demonstrate an ultrastrong and exceptional environmentally stable bamboo composite consisting of a graphene oxide (GO)/bamboo core and hierarchical SiO2 protection layer. The GO/bamboo composite exhibits ultrahigh tensile strength (641.6 MPa), superb flexural strength (428.4 MPa), and excellent toughness (17.5 MJ/m3), which are increased by about 480, 250, and 360% compared with natural bamboo, respectively. As a result, the specific tensile strength of the GO/bamboo composite is up to 513.3 MPa·cm3/g due to its low density (1.25 g/cm3), outperforming engineering structural materials such as aluminum alloys, steels, and titanium alloys. These large improvements benefit from the well-preserved bamboo scaffold and the strong hydrogen bonds between bamboo fibers and GO nanosheets. On the other hand, the SiO2@GO/bamboo composite shows superhydrophobicity due to the construction of hierarchical SiO2 layers, which endows it with outstanding water resistance. Moreover, the bamboo composite shows an ultralow coefficient of thermal expansion (≈2.3 × 10–6 K–1), indicating its excellent dimensional stability. Considering the ultrahigh mechanical performance and outstanding environmental stability, the developed lightweight SiO2@GO/bamboo composite is hopeful to be a green and sustainable structural material for practical engineering applications.
研究领域:
材料科学
·
可持续工程
·
复合材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Ziqi Wang,Yafang Gao,Zhangjin He,Liping Lu
In this paper, we systematically investigated the aggregation-induced electrochemiluminescence (AIECL) of the ruthenium(II) complex ([Ru(phen) 2 (phen-O 2 )](PF 6 ) 2 , phen-O 2 : 5,6-diketone-1,10-phenanthroline), which was dissolved in solvents with different water/acetonitrile volume ratios. The fluorescence intensity of the system increased 11.5-fold when the proportion of water (a poor solvent) in the solvent mixture was increased to 90%, and the electrochemiluminescence intensity increased 16-fold when the proportion of water in the solvent was increased to 80%. Transmission electron microscopy and dynamic light scattering confirmed the aggregation of [Ru(phen) 2 (phen-O 2 )](PF 6 ) 2 molecules into nanoclusters. Aggregation-induced electrochemiluminescence properties were observed to increase with an increase in the proportion of water in H 2 O/CH 3 CN. Due to the excellent aggregation-induced luminescence performance of [Ru(phen) 2 (phen-O 2 )](PF 6 ) 2 , the quantitative detection of dopamine was achieved with a good linear range of 100 pM–1uM and a limitation of detection of 33.3 pM. This simple and sensitive method based on the AIECL effect can be widely applied to the detection and analysis of other small biological molecules.
研究领域:
分析化学
·
材料科学
·
电化学
·
纳米技术
·
生物传感器
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2024
·
IF 8.1
Xu Zhang,Lixingzi Wu,Xinle Han,Yuzhi Shi,Jiwen Huang,Botao Ding,Yanhao Zhang,Zhibin Zhang,Yanfeng Shi,Fulin Li
Both perfluorooctanoic acid (PFOA) and polystyrene microplastics (PS-MPs) are emerging contaminants commonly found in aqueous environments. In co-contaminated areas, MPs may act as carriers for PFOA, complicating transport dynamics. However, information on their cotransport in porous media is limited. This study investigates the transport behaviors of PFOA and PS-MPs in saturated quartz sand columns under varying ionic strength (IS), cation type, and pH. Using the DLVO interaction energy theory and a mathematical model, we analyzed their cotransport. The results demonstrated that PS-MPs inhibited PFOA transport due to hydrophobic adsorption, reducing PFOA mobility. However, at pH 5, PS-MPs facilitated PFOA transport through competitive adsorption on sand surfaces. Conversely, PFOA significantly accelerated PS-MPs transport, likely due to electrostatic repulsion and reduced PS-MPs size. The promoting effect of PFOA on PS-MPs was similar in NaCl and CaCl 2 solutions. It is noteworthy that under acidic conditions, the increased electrostatic attraction between PS-MPs and quartz sand leads to substantial adsorption of PS-MPs onto the quartz sand surface. Under these conditions, PFOA exerts almost no promoting effect on PS-MPs. This study showed that the coexistence of PS-MPs and PFOA would influence the mobility of each other in the saturated porous media. Overall, the findings from this work could greatly improve our understanding of cotransport behaviors and environmental risk of PS-MPs and PFOA.
研究领域:
环境科学
·
污染生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Chenxia Li,Bowen Chen,Degang Deng,Hua Yu,Hao Li,Changyu Shen,Le Wang,Shiqing Xu
The La 1-0.03- y Gd y AlO 3 : 0.03Eu ( y = 0.2–0.8) phosphors are prepared via solid phase method. The normal thermal quenching of Eu 2+ ion and abnormal thermal quenching of Eu 3+ ion in La 1-0.03- y Gd y AlO 3 : 0.03Eu ( y = 0.2–0.8) phosphors are explained by the configuration coordinate system and energy transfer process . Considering the fluorescence intensity ratio temperature measurement technology, the temperature sensitivity values of the phosphors increase with the increase of Gd 3+ ion concentration . When Gd 3+ ion concentration is 0.8, the maximal S a and S r can even reach 0.084 K -1 and 3.233% K −1 . Moreover, the excellent separation of emission peaks of Eu 2+ and Eu 3+ ions also provides good signal discriminability for temperature measurement. These results indicate that the La 1-0.03- y Gd y AlO 3 : 0.03Eu phosphors can be used as the superior non-contact optical thermometry materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Micromachines
·
2023
·Vol. 14
·期 9
·1663
·
IF 3.4
Yunsheng Fu,Xianglei Yu,Li Liu,Xianjie Tang,Junpeng Li,Guoyou Gan
Low-temperature lead-free silver pastes deserve thorough investigation for sustainable development and application of MgTiO3ceramics in electronic devices. In this study, a series of Bi2O3-B2O3-ZnO-SiO2-Al2O3-CaO glasses with suitable softening temperatures were prepared via melt quenching using a type of micrometer silver powder formed by silver nanoparticle aggregates. The composite pastes containing silver powder, Bi2O3glass powder and an organic vehicle were then screen-printed. The effects of glass powder concentration and sintering temperature on the microstructure of the surface interface were also investigated. The results showed that the silver paste for microwave dielectric ceramic filters (MgTiO3) possessed good electrical conductivity (2.28 mΩ/□) and high adhesion (43.46 N/mm2) after medium temperature (670 °C) sintering. Thus, this glass powder has great application potential in non-toxic lead-free silver pastes for metallization of MgTiO3substrates.Keywords:silver paste;MgTiO3;bonding strength;low-temperature sintering
研究领域:
材料科学
·
电子工程
✓ 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）