JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Rui Miao,Youya Zhou,Pei Wang,Wei Lu,Pu Li,Xiaoyan Li,Lei Wang
Pre-chlorination and pre-ozonation are the two most common pre-oxidation processes for fouling control of ultrafiltration membranes. However, few studies have explored and compared their effect mechanisms on membrane fouling behavior at the interfacial forces level. Accordingly, bull serum albumin (BSA) was used, and the changes in the interaction forces of BSA at the membrane surface after pre-chlorination and pre-ozonation were investigated. The results were combined with macro/micro analyses to unravel the effect mechanisms of chlorination and ozonation on membrane fouling behavior. Results demonstrated that the changes in the hydrophobic forces, hydrogen bonds and electrostatic repulsive forces between the membrane and BSA and between BSA molecules after pre-chlorination and pre-ozonation, were beneficial for membrane fouling control in theory, but not helpful. These changes in the non-covalent bonds appear to be completely masked by changes in disulfide bonds. The chlorination could break the disulfide bonds between BSA molecules, while ozonation could promote their formation. As a result, the deposition behavior of BSA onto the membrane surface and the structures of corresponding fouling layers after pre-chlorination were quite different from those after pre-ozonation. Finally, two different membrane fouling behaviors were observed that membrane fouling was definitively mitigated by pre-chlorination but enhanced by pre-ozonation.
研究领域:
环境科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2022
·
IF 4.432
Lijie Lin,Yingzhu Wang,Zhiyong Lin,Weiang Luo,Hong Zhang,Guorong Chen,Hesheng Cao,Conghui Yuan,Yiting Xu,Birong Zeng,Lizong Dai
Understanding the reinforcement and fracture mechanism of polymer matrix nanocomposites is crucial for the design of high-performance composite materials. By taking boron nitride@boronate polymer core-shell nanoparticles modified epoxy resin nanocomposites (EPNCs) as an example, a reinforcement and fracture mechanism analysis model of nanocomposites was established through the combination of experiments and simulations. Instead of the traditional programming method by using the external language, a new modeling method was introduced with the help of Digimat. The results indicated that the interface force between (within) EP matrix and nanoparticles , the shell thickness and nanoparticle content play important roles in the reinforcement and fracture of EPNCs. The bending strength increases with the raising of particle content, but decreases with the increasing of shell thickness. The simulated results were consistent with the experiments. The interface force evolves according to the order of interfaces within particles and their shell > matrix-shell > matrix interior. A proper interfacial force can make interfacial debonding and matrix failure occur at the same time, thus improving both the strength and toughness of nanocomposites. This model construction will provide theoretical guidance for nanocomposites design and the clarification of reinforcement mechanism.
研究领域:
材料科学
·
力学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Junyao Li,Lin Ma,Shilong Mao,Jinfeng Wang,Yanfeng Luo
Protein adsorption on biomaterials occurs before cell adhesion. To adapt the properties of biomaterials, adhered cells may utilize and modify adsorbed proteins for survival and function. In this process, the protein–material interfacial force (Fad) is supposed to play vital roles, which, however, has received little attention. Here, we found that rat mesenchymal stem cells (rMSCs) can utilize the adsorbed fibronectin (FN) via reorganization, desorption, or endocytosis, and these utilization processes are regulated by Fad through regulating cell adhesion and force balance between the cell traction force and Fad. Furthermore, protein utilization has an Fad-dependent temporal sequence. On low Fad surface, FN endocytosis might happen prior to FN desorption and aggregation. This work confirms the importance of Fad in protein utilization and provides new insight into the mechanism by which cells process their surrounding ECM proteins, which may help to guide the design of better biomaterials.
研究领域:
生物材料学
·
细胞生物学
·
生物力学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2021
·Vol. 28
·期 3
·943-954
·
IF 2.496
Zou Xiuyang,Zhao Yijiang,Li Meisheng,Zhou Shouyong,Chen Chenglung
Graphitic carbon nitride (g-C 3 N 4 ) nanosheets have attracted great attention in the areas of photocatalysis, sensors, energy storages and membrane separations. A three-step exfoliation strategy was designed to use solvent exfoliating g-C 3 N 4 nanosheets from bulk g-C 3 N 4 . In the first stage, bulk g-C 3 N 4 was prepared and then exfoliated into g-C 3 N 4 nanosheets by various solvents. In the second stage, molecular dynamics simulations were carried out and the energy barriers for the exfoliations were determined. Various interactions between solvent molecules and exfoliated nanosheet were analyzed. In the third stage, exfoliation was re-carried out according to the result from MD simulation to obtain optimal amount of exfoliated g-C 3 N 4 nanosheets. The experimental result matched with the simulation prediction very well. In combination with simulation and experiment, a successful way to obtain maximum amount of exfoliated g-C 3 N 4 nanosheet was set up. Then a 5.03 mg/mL g-C 3 N 4 suspension was obtained. Meanwhile, a concept of kinetic energy increment was introduced for the first time to explain the exfoliating efficiency of g-C 3 N 4 nanosheets, which greatly reduced the simulation time by 80% compared with the free energies in terms of the potential of mean force.
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
COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Gang Qiao,Yuyang Zhao,Pan Wang,Dongshuai Hou,Binmeng Chen
The morphology of interface hydration products is crucial as it directly determines the interface mechanics. Inspired by the fishing nets, we employed photo-grafted active copolymer Poly(vinylpyrrolidone-co-acrylic acid) on the inert glass fibers. Providing a template for PVP-co-PAA maintains its regulatory capability in cement paste. For the first time, ordered nanomesh-like hydrated calcium silicate (CSH) with average pore diameter of 30 nm are developed in cement paste. The interface strength and energy absorption increased by 90 % and 253 %, respectively. XPS and SEM revealed that the multi-scale regulation mechanisms originated from the preferential adsorption and stable dispersion of Ca 2+ result from the strong electronegativity and steric hindrance of pyrrolidone rings. CSH nuclei (60 nm) dispersed well on fiber templates, stacked along fiber surfaces, without collapse or tilt, intertwined into nanomesh. Nanomesh-like CSH in cement paste holds significant potentials for the improvement of mechanical properties of fiber-cement interfaces, contributing to construction sustainability.
研究领域:
建筑材料学
·
界面化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Fengjuan Wang,Yi Liu,Yu Zhang,Jinyang Jiang,Jie Chen
Functional group is of great significance for interface mechanical properties of nano composites, while functional groups screening is a great challenge due to the complex molecular behaviors. Herein, molecular dynamics and experiments probe the dynamics, molecular structure, and interfacial bonding at the GO/epoxy resin interface and the functional groups screening of GO to reinforce composites. The interface energy of the composites for the case of -OH, COOH, and -NH 2 is more than three times that of C=O and COC. The dynamics characteristics of the former ones show typic solid feature, while that of the latter ones exhibits liquid feature. The interface energy of -NH 2 case is the highest. The groups of -NH 2 and -COOH on the graphite sheet undergo condensation reactions to form amide bonds, transforming the two-dimensional sheet into three-dimensional wrinkled texture. The aminated GO reinforced composites exhibit the behavior of increasing cracks distribution to release stress.
研究领域:
材料科学
·
纳米技术
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
CEMENT AND CONCRETE RESEARCH
·
2025
·
IF 13.1
Gang Qiao,Yuyang Zhao,Pan Wang,Dongshuai Hou,Binmeng Chen
Interface between calcium silicate hydrate (CSH) and polymers is crucial for the mechanical properties and durability. However, direct experimental determination of interfacial mechanics at nanoscale has not been reported. Herein, atomic force microscopy (AFM) with grafted Poly (1-vinylpyrrolidone- co -acrylic acid) (PVP-co-PAA) on AFM tips were utilized to measure interfacial properties between CSH and PVP-co-PAA under four C/S at nanoscale. The interfacial force curves were clearly presented for the first time. Results showed that compared to as-received tip, representing SiO 2 , the adhesive force and energy dissipation increased by 72.42 % and 417 %. Interface separation speed was delayed by 300 % ∼ 400 %. Molecular simulations of interfacial separation aligned with AFM experimental results, where interfacial ion-pair, dynamics stability and polymer conformational changes provided insights for AFM experiment on adhesion force and delay of interface separation speed. Determination of interfacial mechanics by AFM experiment and insights by molecular simulation decoded CSH/PVP-co-PAA interfaces thoroughly.
研究领域:
材料科学
·
纳米技术
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 29
·2300621
·
IF 29.4
Zhaoning Hu,Fangfang Li,Haotian Wu,Junhao Liao,Quan Wang,Ge Chen,Zhuofeng Shi,Yaqi Zhu,Saiyu Bu,Yixuan Zhao,Mingpeng Shang,Qi Lu,Kaicheng Jia,Qin Xie,Guorui Wang,Xiaodong Zhang,Yinbo Zhu,Hengan Wu,Hailin Peng,Li Lin,Zhongfan Liu
Recently, scalable production of large-area graphene films on metal foils with promising qualities is successfully achieved by eliminating grain boundaries, wrinkles, and adlayers. The transfer of graphene from growth metal substrates onto functional substrates remains one inescapable obstacle on the road to the real commercial applications of chemical vaport deposition (CVD) graphene films. Current transfer methods still require time-consuming chemical reactions, which hinders its mass production, and produces cracks and contamination that strongly impede performance reproducibility. Therefore, graphene transfer techniques with fine intactness and cleanness of transferred graphene, and improved production efficiency would be ideal for the mass production of graphene films on destination substrates. Herein, through the engineering of interfacial forces enabled by sophisticated design of transfer medium, the crack-free and clean transfer of 4-inch-sized graphene wafers onto silicon wafers within only 15 min is realized. The reported transfer method is an important leap over the long-lasting obstacle of the batch-scale graphene transfer without degrading the quality of graphene, bringing the graphene products close to the real applications.
研究领域:
材料科学
·
纳米技术
·
化学工程
✓ 已验证
DOI
高影响因子
BIOMACROMOLECULES
·
2021
·
IF 6.988
Jinfeng Wang,Junyao Li,Juan Liu,Manping Lin,Shilong Mao,Yuanliang Wang,Yanfeng Luo
Osteoblasts actively generate cell traction force (CTF) to sense chemical and mechanical microenvironments. Fluid shear stress (FSS) is a principle mechanical stimulus for bone modeling/remodeling. FSS and CTF share common interconnected elements for force transmission, among which the role of the protein-material interfacial force (Fad) remains unclear. Here, we found that, on the low Fad surface (5.47 ± 1.31 pN/FN), CTF overwhelmed Fad to partially desorb FN, and FSS exacerbated the desorption, resulting in disassembly of the actin cytoskeleton and focal adhesions (FAs) to reduce CTF and establishment of a new mechanical balance at the FN-material interface. Contrarily, on the high Fad surface (27.68 ± 5.24 pN/FN), pure CTF or the combination of CTF and FSS induced no FN desorption, and FSS promoted assembly of actin cytoskeletons and disassembly of FAs, regaining new mechanical balance at the cell-FN interface. These results indicate that Fad is a mechanical regulator for transmission of CTF and FSS, which has never been reported before.
研究领域:
生物力学
·
细胞生物学
·
组织工程
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Xinhao Shi,Liping Wang,Wanbo Hou,Jiahui Ding,Tao Feng,Hongjiao Lin,Mingde Tong
Multiphase HfC-SiC ceramic matrix composites were prepared by a combination process. The interface mechanics and ablation properties behaviors were investigated. Introducing the PyC-SiC interface, the composites showed a second-order pull-out mechanism. The mechanical failure model showed that fibers and matrix have different failure strain under load depending on the component that fails first. Moreover, the ablative airflow in the center area will spread to the edge area through the thermal shock microcracks generated. Increasing of the heat flux, the crack width gradually increased to be ditches. It accelerated the evolution of surface morphology, which showed HfC-SiC substrate was first transformed into Hf-Si-O solid solution on the process of phase transformation of oxidation products from 1680 ℃ to 2150 ℃, and eventually sintered into HfO 2 . The change in the morphology of oxidation product consumed more heat and protected the substrate from oxidation, resulting in improving the ablation resistance of composites.
研究领域:
材料科学
·
陶瓷基复合材料
·
机械工程
·
热防护系统
·
烧蚀研究
✓ 已验证
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-14
·
IF 16.6
Chen Feipeng,Li Xiufeng,Yu Yafeng,Li Qingchuan,Lin Haisong,Xu Lizhi,Shum Ho Cheung
Engineering heterogeneous hydrogels with distinct phases at various lengths, which resemble biological tissues with high complexity, remains challenging by existing fabricating techniques that require complicated procedures and are often only applicable at bulk scales. Here, inspired by ubiquitous phase separation phenomena in biology, we present a one-step fabrication method based on aqueous phase separation to construct two-aqueous-phase gels that comprise multiple phases with distinct physicochemical properties. The gels fabricated by this approach exhibit enhanced interfacial mechanics compared with their counterparts obtained from conventional layer-by-layer methods. Moreover, two-aqueous-phase gels with programmable structures and tunable physicochemical properties can be conveniently constructed by adjusting the polymer constituents, gelation conditions, and combining different fabrication techniques, such as 3D-printing. The versatility of our approach is demonstrated by mimicking the key features of several biological architectures at different lengths: macroscale muscle-tendon connections; mesoscale cell patterning; microscale molecular compartmentalization. The present work advances the fabrication approach for designing heterogeneous multifunctional materials for various technological and biomedical applications.
研究领域:
材料科学
·
生物医学工程
·
组织工程
·
高分子化学
·
生物材料
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）