INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 10
·4643
·
IF 4.9
Tingqiang Yan,Kang Chen,Xiaodong Wang,Yingjie Qiao
Polylactic acid (PLA) exhibits remarkable biocompatibility and biodegradability, rendering it a highly promising material for applications in packaging and disposable products. However, its inherent brittleness, low melt strength, and slow crystallization rate significantly restrict its practical uses. Our previous studies have shown that incorporating the ADR chain extender can yield chitosan–polylactic acid–ADR (CS/PLA-ADR) composites with outstanding antibacterial properties, enhanced biodegradability, and the capability to effectively block water vapor and oxygen. However, the low elongation at break (less than 10%) limits its application in scenarios that require high ductility. To enhance the toughness of the CS/PLA-ADR composites, the flexible biodegradable polybutylene succinate (PBS) is innovatively introduced. The mechanical properties of PBS can be compared with polyethylene and polypropylene, providing high strength and toughness. The mechanism of introducing PBS is to construct a good, toughened structure through the flexible structure of PBS in collaboration with ADR toughening agent, achieving a balance between strength and toughness in CS/PLA-ADR-PBS composites. The incorporation of PBS is anticipated to improve the ductility of CS/PLA-ADR composites. This study systematically investigates the effects of varying PBS content (0–30%) on the properties of CS/PLA-ADR-PBS composites, aiming to determine the optimal PBS content and elucidate the mechanism by which PBS enhances the overall performance of the composites. The results indicate that when the PBS content is 20%, the composites exhibit optimal overall properties. This research provides a theoretical foundation and technical support for the development of environmentally friendly and sustainable packaging materials, offering significant research value and broad application prospects.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Xiangren Bai,Xiang Zhang,Dongdong Zhao,Xudong Rong,Naiqin Zhao,Chunnian He
Strain localization at grain boundaries (GBs) is one of the key factors contributing to the trade-off between strength and ductility in engineering alloys. To address this issue, we developed a unique perpendicular interlocking structure connecting the matrix GBs by introducing trans -granular graphene nano-shells (SGSs) via a two-step targeted localized Cu–Al interdiffusion process. In the as-built structure, the original GBs served as the soft component, while the perpendicularly intersecting SGSs acted as the hard component. This configuration not only promotes sustainable dislocation accumulation in the vicinity of the GBs but also facilitates plastic strain delocalization through stress shielding effects from the SGSs. By effectively impeding the extension of shear bands and redirecting crack propagation towards the grain interiors, these hetero-structured GBs contribute to reducing the intrinsic brittleness of GBs. Consequently, the SGS/AlCu composite demonstrates a remarkable balance of tensile strength (∼574 MPa) and ductility (∼17 %). Our findings suggest that restructuring the geometry of GBs in metallic alloys presents a promising strategy for mitigating strain localization at GBs, offering potential for enhancing the properties of metallic alloys in various engineering applications.
研究领域:
材料科学
·
力学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2023
·
IF 3.6
Dongyang He,Hailang Liu,Zhuangzhi Wu,Dezhi Wang
The low ductility of refractory Mo-based materials limits their further processing and wide applications. To address this challenge, a composite strengthening and toughening strategy was proposed by the simultaneous addition of WC and La 2 O 3 . And a collaborative improvement of strength and ductility is achieved over the as-sintered Mo-WC-La 2 O 3 , exhibiting a total elongation (TE) of 33.63% and an ultimate tensile strength (UTS) of 611.33 MPa, about 50.27% and 24.76% larger than those of pure Mo, respectively. Furthermore, the corresponding microstructural features and tensile fracture behavior were also discussed to explore the improvement mechanism. And it is found that the enhancement should be attributed to the high relative density, grain refinement, generated substructures and secondary phase particle refinement. Moreover, the additional toughening mechanisms of crack deflection, particles pull-out and crack halt can also prevent crack extension, which helps to give full play to the potential ductility of Mo composites. This work provides a new pathway for manufacturing advanced Mo-based products with excellent strength-ductility balance.
研究领域:
材料科学
·
力学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Dinghao Wu,Chao Ye,Yawen Liu,Jing Ren,Yuan Yao,Shengjie Ling
Light, strong, and ductile materials (LSDMs) are desired in many emerging fields, such as biomedicine, aerospace industries, and structural engineering materials. However, producing such materials remains a significant challenge because their structures cannot confer the desired mechanical properties. In this study, we developed a silk fiber “welding” strategy to construct bioinspired LSDMs. The key to the welding process is to etch the surface of silk fiber through a partial dissolution process. The dissolved silk proteins further serve as welding materials or glues to bond the silk fibers together. Remarkably, these silk-LSDMs are not only lightweight (with the densities of around 0.28 g cm–3) but also strong and tough. Their compression strength reaches up to 13.8 ± 3.4 MPa, which is higher than those of most natural and engineered porous materials. These favorable structural and mechanical characteristics, together with outstanding biocompatibility of silk proteins, render these silk-LSDMs applicable in regenerated engineered tissues and water treatment materials.
研究领域:
材料科学
·
生物医学工程
·
结构工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yapeng Zheng,Tianyang Cui,Jingwen Wang,Yuquan Chen,Mingyu Ou,Hailong He,Yuan Hu,Zhou Gui
Polymeric gels have emerged as cornerstone materials in driving transformative advancements in flexible sensors, electronic skins, and wearable devices. While low hysteresis enables efficient energy transfer, high stretchability accommodates large deformations, and superior mechanical strength ensures structural integrity, their balanced integration remains a critical challenge. In this research, we introduce a solvent-engineered approach to fabricate P(HEA-co-AA) DES-IL gels via a precisely tuned hybrid solvent system. By leveraging electrostatic interactions and structural dynamics, the resulting DES-IL gels exhibit exceptional mechanical properties, including ultra-high stretchability (∼1783.6 %), high fracture strength (520.5 kPa), and superior compressive strength (∼795.0 kPa at 75 % strain). Additionally, these gels show low hysteresis (6.4 %) and a low energy coefficient (η = 0.175). These intrinsically conductive gels were utilized to develop customizable strain sensors, demonstrating notable sensitivity with a gauge factor of 1.01 and a remarkable linear correlation coefficient (R 2 = 0.998) across a broad strain range. These sensors also featured a fast response time (143 ms), low hysteresis time (161 ms), and a low strain detection threshold (0.1 %). Leveraging these features, a wireless motion detection platform was demonstrated, enabling real-time recognition of dynamic strain and human motion patterns. Furthermore, these sensors support encrypted data transmission, highlighting their potential for secure, multifunctional sensing in next-generation flexible electronics.
研究领域:
材料科学
·
柔性电子
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2021
·
IF 5.234
Xiaoyu Zhang,Ying Liu,Xiaobo Liu,Jingfan Zhang,Xin Chen,Yanxia Wu,Lin Jing,Xiaolei Wu,Min Zhao,Peide Han
Few-layer graphene reinforced nickel matrix (GNs/Ni) composites were fabricated by a facile in-situ processing strategy involving the transformation from solid carbon precursors to graphene reinforcements under the vacuum hot-press sintering. It enabled the homogeneous distribution of reinforcements, the effective interfacial bonding between graphene nanosheets and Ni matrix, as well as the resisted grain growth during the high-temperature consolidation process. The GNs/Ni composites exhibited exceptionally enhancement of the strength and ductility simultaneously. The composite with 0.3 wt% graphene achieved the optimal yield strength, tensile strength , and fracture elongation of 285 MPa, 611 MPa, and 56%, respectively, which were enhanced by 1.16, 1.34 and 1.37 folds compared to those of pure Ni bulk. The microstructures before and after tensile deformation demonstrated that the strengthening effect of in-situ grown graphene in the Ni matrix was attributed to the grain refinement and effective load transfer, while the toughening effect was related to the crack bridging and graphene pull-out mechanisms.
研究领域:
材料科学
·
力学
✓ 已验证
产品关联
DOI
高影响因子
ACTA MATERIALIA
·
2024
·
IF 8.3
Xiaohui Zhang,Ding-Bang Xiong,Yazhou Liu,Yanlin Jia,Yi Zhang,Meng Zhou,Hanjie Liu,Yongfeng Geng,Xinyao Wang,Pan Liu,Xiaoguo Song,Di Zhang
Nanostructured metals are strong, but have poor ductility and thermal stability, and require extreme preparation conditions. We conceive a strategy of ultrahigh extensibility enabled by van der Waals interface for fabricating bulk nanostructured metals via plastic deformation under moderate conditions. As an example, laminated copper grains are continuously refined to be less than 50 nm in thickness, owing to interlayer sliding of multilayer graphene and co-deformation of Cu C along their interfaces in a conventional cold-rolling process. The as-rolled nanostructured copper with 34,000 % deformation degree has superior combination of ultimate tensile strength and electrical conductivity up to (827 MPa, 85.2%IACS), and exhibits extraordinarily thermally stable keeping an average grain size as small as ∼600 nm even after annealing at a temperature near the melting point. This van der Waals interface strategy provides an efficient and industrially scalable route for fabricating high performance bulk nanostructured metals via conventional methods under moderate conditions.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Yong Liu,Mingji Su,Yanbo Fu,Pingping Zhao,Meng Xia,Yuhong Zhang,Benqiao He,Peixin He
Constructing high-performance materials that combine high separation efficiency, corrosive environments tolerance and self-healing ability are highly attractive for the next generation oil/water separation materials, but it is still a grand challenge. Here, we report a supramolecular hydrogel network of acrylamide and acrylic acid copolymers (P (AM-co-AA)) and chitosan (CS), sequentially cross-linked by amino-functionalized silica (APTES-SiO 2 ) nanoparticles. The as-prepared APTES-SiO 2 /P (AM-co-AA)/CS composite hydrogels demonstrate outstanding ductility up to 1360% elongation, and good self-healing ability, combined with excellent under-water superoleophobicity with an oil contact angle above 164°. Most importantly, the underwater superoleophobic properties can be well maintained in various extremely harsh environments, such as acid, alkali and salt solution, providing great potential for oil/water separation in these corrosive environments. Indeed, the hydrogel-coated mesh displays oil/water selectivity above 98.7% at higher water flux.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiaobo Xu,Tiwei Xiao,Jingpeng Wen,Jiehua Li,Yongqian Chen,Ai Lu,Hong Tan,Changyu Tang
In this study, a two-step chemical reaction is designed in 3D printing process for fabricating polysiloxane-based polyurethane-polyurea (PSURA) 3D products with a high strength and ductility. First, an acrylic and –NCO groups-containing polysiloxane-based polyurethane (PSUA) prepolymer with good flowability is synthesized and printed into the desired 3D structure under UV irradiation. Subsequently, the residual –NCO groups in UV-crosslinked PSUA react with chain extender, resulting in the chemical growth of the crosslinked polymer network. This process significantly reinforces and toughens the printed products by increasing their molecular weight and introducing multiple hydrogen bonds. The tensile strength and elongation at break of the cured PSUA ink can be significantly increased by 330% and 60%, respectively. Due to hydrogen bond dissipation of matrix and buckling of cellular structure under compression, the printed foam with desirable structure exhibits a large energy dissipation for reducing the impact force by 68.9%, which surpasses commercial protective materials.
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
INTERMETALLICS
·
2022
·
IF 4.075
Zeyun Cai,Jiayin Chen,Zhen Zhang,Kun Li,Xinxin Yang,Guoqiang Xie
Oxygen solid solution reinforced Ti–O alloys with high strengths and good ductility were designed and synthesized via mechanical milling and spark plasma sintering (SPS) processes. The grain size and dispersion state of the Ti–O alloys were optimized by regulating the milling time of the composite powders. Outstanding properties were achieved by 4 h milling with a yield strength of 1082 MPa, 100% higher than that of commercially pure titanium (CP–Ti). According to the quantified results of the strengthening mechanism, fine grains are responsible for the balance of superior strength and ductility of the Ti–O alloy.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Liangren Chen,Xiaohua Chang,Jianwen Chen,Yutian Zhu
Integrating structural anisotropy, excellent mechanical properties, and superior sensing capability into conductive hydrogels is of great importance to wearable flexible electronics yet challenging. Herein, inspired from the aligned structure of human muscle, we proposed a facile and universal method to construct an anisotropic hydrogel composed of polyacrylamide and sodium alginate by pre-stretching in a confined geometry and subsequent ionic cross-linking. The designed hydrogels showed extraordinary mechanical performances, such as ultrahigh stretchability, a comparable modulus to that of human tissues, and good toughness, ascribed to their anisotropically aligned polymer networks. Additionally, the hydrogel possessed anisotropic conductivity due to the anisotropy in ion transport channels. The hydrogel along the vertical direction was further cut and assembled into a flexible strain sensor, exhibiting a low detection limit (0.1%), wide strain range (1585%), rapid response (123 ms), distinct resilience, good stability, and repeatability, thereby being capable of monitoring and discriminating different human movements. In addition, the relatively high ionic conductivity and superior sensitivity enabled the anisotropic hydrogel sensor to be used for wireless human–machine interaction. More interestingly, the Ca2+-cross-linking strategy also endowed the hydrogel sensor with antifreezing ability, further broadening their working temperature. This work is expected to speed up the development of hydrogel sensors in the emerging wearable soft electronics.
研究领域:
材料科学
·
生物医学工程
·
柔性电子学
✓ 已验证
DOI
高影响因子
POLYMER TESTING
·
2024
·
IF 5
Yidong Wu,Dan Hong,Shijie Qiu,Yi Fang,Yabin Zhu
As concerns about personal health continue to escalate, there is an urgent need to innovate the development and production of photopolymeric 3D printing thermoset materials with inherent antibacterial properties and high elongation, paving the way for significant advances in 3D printing technology. In this work, two acrylate compounds (CMA and CAMA)with inherent antibacterial properties were synthesized using renewable monomers derived from citronellol and cinnamyl alcohol. The chemical structures of the two acrylate compounds were verified via Fourier transform infrared spectroscopy(FT-IR) and 1 H NMR. The addition of these compounds to the photopolymeric 3D printing resin system can facilitate the production of 3D printed thermoset materials with inherent antibacterial properties. The mechanical and antibacterial properties of photopolymeric 3D printing thermosets were assessed utilizing tensile tests and oscillation methods. The results show that the addition of CMA and CAMA can significantly improve the fracture elongation and antibacterial performance of photopolymeric 3D printing thermosets. The improved systems exhibited the highest antibacterial rate (94.2 % and 98.9 %, respectively), and fracture productivities (47 % and 50 %, respectively). These results highlight the significant impact of integrating CMA and CAMA to enhance the toughness and antibacterial effects of photopolymeric 3D printing systems.
研究领域:
材料科学
·
生物医学工程
✓ 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）