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novel strategy for the construction of silk fibroin–SiO composite aerogel with enhanced mechanical propertyand thermal insulation performance

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 3,   Pages 288-297 doi: 10.1007/s11705-022-2222-7

Abstract: application of silica aerogels is an enormous challenge due to the difficulties in improving both mechanical propertyand thermal insulation performance.In this work, silk fibroin was used as scaffold to improve the mechanical property and thermal insulationwas well-dispersed in the silk fibroin aerogel and composite aerogels exhibited enhanced mechanical propertyand thermal insulation performance, which has potential application as thermal insulation material.

Keywords： silica aerogel     silk fibroin     impregnation     thermal insulation     mechanical property    

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Adsorption property of direct fast black onto acid-thermal modified sepiolite and optimization of adsorption

Chengyuan SU, Weiguang LI, Yong WANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 4,   Pages 503-511 doi: 10.1007/s11783-012-0477-9

Abstract: The adsorption of direct fast black onto acid-thermal modified sepiolite was investigated.utilized for modeling and optimization of the adsorption conditions for direct fast black onto the acid-thermalThe raw sepiolite was converted to acid-thermal modified sepiolite, and changes in the fourier transformThe zeolitic water disappeared and the purity of sepiolite was improved by acid-thermal modification.The decolorization rate of direct fast black adsorbed increased from 68.2% to 98.9% on acid-thermal modified

Keywords： direct fast black     acid-thermal modified sepiolite     adsorption     response surface methodology    

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Thermal radiative properties of metamaterials and other nanostructured materials: A review

Ceji FU, Zhuomin M. ZHANG

Frontiers in Energy 2009, Volume 3, Issue 1,   Pages 11-26 doi: 10.1007/s11708-009-0009-x

Abstract: through the modification of the reflection and transmission properties of electromagnetic waves and thermal

Keywords： metamaterial     nanostructured material     thermal radiative property     radiative energy transfer    

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Dielectric property of polyimide/barium titanate composites and its influence factors (II)

LIU Weidong, ZHU Baoku, XIE Shuhui, XU Zhikang

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 4,   Pages 417-421 doi: 10.1007/s11705-008-0078-0

Abstract: Using poly(amic acid) (PAA) as a precursor followed by thermal imidization, the polyimide/barium titanate

Keywords： thermal imidization     dielectric constant     particle     precursor     titanate composite    

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of hierarchical nanohybrid CNT@Ni-PS and its applications in enhancing the tribological, curing and thermal

Jinian Yang, Yuxuan Xu, Chang Su, Shibin Nie, Zhenyu Li

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 5,   Pages 1281-1295 doi: 10.1007/s11705-020-2007-9

Abstract: The morphological structures, tribological performances, curing behaviors and thermal properties of EPwell-bonded interfacial adhesion in the matrix are successfully obtained, presenting significantly improved thermal

Keywords： nickel phyllosilicate     surface decoration     tribological property     curing kinetics     thermal performance    

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Microdamage study of granite under thermomechanical coupling based on the particle flow code

Frontiers of Structural and Civil Engineering   Pages 1413-1427 doi: 10.1007/s11709-023-0953-2

Abstract: the thermodynamic response and underlying cracking behavior of a deep-buried tunnel under different thermal

Keywords： thermomechanical coupling effect     granite     improved linear parallel bond model     thermal property     particle    

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Modeling process-structure-property relationships for additive manufacturing

Wentao YAN, Stephen LIN, Orion L. KAFKA, Cheng YU, Zeliang LIU, Yanping LIAN, Sarah WOLFF, Jian CAO, Gregory J. WAGNER, Wing Kam LIU

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 4,   Pages 482-492 doi: 10.1007/s11465-018-0505-y

Abstract:

This paper presents our latest work on comprehensive modeling of process-structure-property relationships

Keywords： additive manufacturing     thermal fluid flow     data mining     material modeling    

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Self-sacrificial templating synthesis of flower-like nickel phyllosilicates and its application as high-performance reinforcements in epoxy nanocomposites

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 4,   Pages 484-497 doi: 10.1007/s11705-021-2074-6

Abstract: Several properties of mechanical, thermal and tribological responses of epoxy nanocomposites were performedthe incorporated flower-like nickel phyllosilicate particles resulted in the continuously increasing thermal

Keywords： nickel phyllosilicate     flow-like structure     mechanical property     thermal stability     tribological performance    

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A computational toolbox for molecular property prediction based on quantum mechanics and quantitativestructure-property relationship

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 2,   Pages 152-167 doi: 10.1007/s11705-021-2060-z

Abstract: During these periods, one of the most important keys is the molecular property prediction models associatingIn this paper, a framework combining quantum mechanics and quantitative structure-property relationshipis established for fast molecular property predictions, such as activity coefficient, and so forth.which are stored in a database and further provided for the developments of quantitative structure-propertyThe whole framework has been carried out within a molecular property prediction toolbox.

Keywords： molecular property     quantum mechanics     quantitative structure-property relationship     heat of reaction    

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Convective heat transfer in helical coils for constant-property and variable-property flows with high

Yufei MAO, Liejin GUO, Bofeng BAI, Ximin ZHANG

Frontiers in Energy 2010, Volume 4, Issue 4,   Pages 546-552 doi: 10.1007/s11708-010-0116-8

Abstract: Both constant-property flows at normal pressure and variable-property flows at supercritical pressure

Keywords： convective heat transfer     helical coils     high Reynolds number     supercritical pressure     variable property    

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A review on the application of nanofluids in enhanced oil recovery

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 8,   Pages 1165-1197 doi: 10.1007/s11705-021-2120-4

Abstract: Enhanced oil recovery (EOR) has been widely used to recover residual oil after the primary or secondary oil recovery processes. Compared to conventional methods, chemical EOR has demonstrated high oil recovery and low operational costs. Nanofluids have received extensive attention owing to their advantages of low cost, high oil recovery, and wide applicability. In recent years, nanofluids have been widely used in EOR processes. Moreover, several studies have focused on the role of nanofluids in the nanofluid EOR (N-EOR) process. However, the mechanisms related to N-EOR are unclear, and several of the mechanisms established are chaotic and contradictory. This review was conducted by considering heavy oil molecules/particle/surface micromechanics; nanofluid-assisted EOR methods; multiscale, multiphase pore/core displacement experiments; and multiphase flow fluid-solid coupling simulations. Nanofluids can alter the wettability of minerals (particle/surface micromechanics), oil/water interfacial tension (heavy oil molecules/water micromechanics), and structural disjoining pressure (heavy oil molecules/particle/surface micromechanics). They can also cause viscosity reduction (micromechanics of heavy oil molecules). Nanofoam technology, nanoemulsion technology, and injected fluids were used during the EOR process. The mechanism of N-EOR is based on the nanoparticle adsorption effect. Nanoparticles can be adsorbed on mineral surfaces and alter the wettability of minerals from oil-wet to water-wet conditions. Nanoparticles can also be adsorbed on the oil/water surface, which alters the oil/water interfacial tension, resulting in the formation of emulsions. Asphaltenes are also adsorbed on the surface of nanoparticles, which reduces the asphaltene content in heavy oil, resulting in a decrease in the viscosity of oil, which helps in oil recovery. In previous studies, most researchers only focused on the results, and the nanoparticle adsorption properties have been ignored. This review presents the relationship between the adsorption properties of nanoparticles and the N-EOR mechanisms. The nanofluid behaviour during a multiphase core displacement process is also discussed, and the corresponding simulation is analysed. Finally, potential mechanisms and future directions of N-EOR are proposed. The findings of this study can further the understanding of N-EOR mechanisms from the perspective of heavy oil molecules/particle/surface micromechanics, as well as clarify the role of nanofluids in multiphase core displacement experiments and simulations. This review also presents limitations and bottlenecks, guiding researchers to develop methods to synthesise novel nanoparticles and conduct further research.

Keywords： nanofluid     EOR mechanism     nanoparticle adsorption     interface property     internal property    

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Experimental study on compaction-induced anisotropic mechanical property of rockfill material

Xiangtao ZHANG, Yizhao GAO, Yuan WANG, Yu-zhen YU, Xun SUN

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 109-123 doi: 10.1007/s11709-021-0693-0

Abstract: The anisotropy of rockfill materials has a significant influence on the performance of engineering structures. However, relevant research data are very limited, because of the difficulty with preparing specimens with different inclination angles using traditional methods. Furthermore, the anisotropy test of rockfill materials is complex and complicated, especially for triaxial tests, in which the major principal stress plane intersects with the compaction plane at different angles. In this study, the geometric characteristics of a typical particle fraction consisting of a specific rockfill material were statistically investigated, and the distribution characteristics of particle orientation in specimens prepared via different compaction methods were examined. For high-density rockfill materials, a set of specimen preparation devices for inclined compaction planes was developed, and a series of conventional triaxial compression tests with different principal stress direction angles were conducted. The results reveal that the principal stress direction angle has a significant effect on the modulus, shear strength, and dilatancy of the compacted rockfill materials. Analysis of the relationship between the principal stress direction angles, change in the stress state, and change in the corresponding dominant shear plane shows that the angle between the compacted surface and dominant shear plane is closely related to interlocking resistance associated with the particle orientation. In addition, different principal stress direction angles can change the extent of the particle interlocking effect, causing the specimen to exhibit different degrees of anisotropy.

Keywords： rockfill     inclination of specimen preparation     anisotropy     mechanical property     mechanism    

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Experimental research on the mechanical property of prestressing steel wire during and after heating

ZHENG Wenzhong, HU Qiong, ZHANG Haoyu

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2,   Pages 247-254 doi: 10.1007/s11709-007-0031-1

Abstract: The mechanical property of prestressing steel wire during and after heating is the key factor in the, the shapes of stress-strain curves of steel wire at high temperature go smooth and the mechanical propertyAccording to the experiment after heating, the mechanical property of steel wire varies little when thelower than 300vH; while the stress-strain curves of steel wire become more ductile and the mechanical propertyThe law of mechanical property indexes of the wire is presented.
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Evaluation and Recombination of Property Right Configuration for Urban Water Supply System

Xiao Wen,Ouyang Fangrui,Wang Xianjia

Strategic Study of CAE 2004, Volume 6, Issue 7,   Pages 48-52

Abstract:

In this paper, two basic models of recombination of property right configuration for urban water supplyThe evaluation index and methodology of property right configuration for urban water supply system areThe characteristics of the two property right configuration models and actions of different benefit bodiesThe strong points and shortcomings of the two property right models are analyzed.

Keywords： urban water supply system     property right configuration     recombination of property right     evaluation ofproperty right model    

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Meshing stiffness property and meshing status simulation of harmonic drive under transmission loading

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0674-6

Abstract: The multitooth meshing state of harmonic drive (HD) is an important basic characteristic of its high transformation precision and high bearing capacity. Meshing force distribution affects the load sharing of the tooth during meshing, and theoretical research remains insufficient at present. To calculate the spatial distributed meshing forces and loading backlashes along the axial direction, an iterative algorithm and finite element model (FEM) is proposed to investigate the meshing state under varied transmission loading. The displacement formulae of meshing point under tangential force are derived according to the torsion of the flexspline cylinder and the bending of the tooth. Based on the relationship of meshing forces and circumferential displacements, meshing forces and loading backlashes in three cross-sections are calculated with the algorithm under gradually increased rotation angles of circular spline, and the results are compared with FEM. Owing to the taper deformation of the cup-shaped flexspline, the smallest initial backlash and the earliest meshing point appear in the front cross-section far from the cup bottom, and then the teeth in the middle cross-section of the tooth rim enter the meshing and carry most of the loading. Theoretical and numerical research show that the flexibility is quite different for varied meshing points and tangential force amplitude because of the change of contact status between the flexspline and the wave generator. The meshing forces and torsional stiffness of the HD are nonlinear with the torsional angle.

Keywords： harmonic drive     meshing flexibility matrix     meshing force     loading backlash     flexspline     contact analysis    

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Title Author Date Type Operation

novel strategy for the construction of silk fibroin–SiO composite aerogel with enhanced mechanical propertyand thermal insulation performance

Journal Article

Adsorption property of direct fast black onto acid-thermal modified sepiolite and optimization of adsorption

Chengyuan SU, Weiguang LI, Yong WANG

Journal Article

Thermal radiative properties of metamaterials and other nanostructured materials: A review

Ceji FU, Zhuomin M. ZHANG

Journal Article

Dielectric property of polyimide/barium titanate composites and its influence factors (II)

LIU Weidong, ZHU Baoku, XIE Shuhui, XU Zhikang

Journal Article

of hierarchical nanohybrid CNT@Ni-PS and its applications in enhancing the tribological, curing and thermal

Jinian Yang, Yuxuan Xu, Chang Su, Shibin Nie, Zhenyu Li

Journal Article

Microdamage study of granite under thermomechanical coupling based on the particle flow code

Journal Article

Modeling process-structure-property relationships for additive manufacturing

Wentao YAN, Stephen LIN, Orion L. KAFKA, Cheng YU, Zeliang LIU, Yanping LIAN, Sarah WOLFF, Jian CAO, Gregory J. WAGNER, Wing Kam LIU

Journal Article

Self-sacrificial templating synthesis of flower-like nickel phyllosilicates and its application as high-performance reinforcements in epoxy nanocomposites

Journal Article

A computational toolbox for molecular property prediction based on quantum mechanics and quantitativestructure-property relationship

Journal Article

Convective heat transfer in helical coils for constant-property and variable-property flows with high

Yufei MAO, Liejin GUO, Bofeng BAI, Ximin ZHANG

Journal Article

A review on the application of nanofluids in enhanced oil recovery

Journal Article

Experimental study on compaction-induced anisotropic mechanical property of rockfill material

Xiangtao ZHANG, Yizhao GAO, Yuan WANG, Yu-zhen YU, Xun SUN

Journal Article

Experimental research on the mechanical property of prestressing steel wire during and after heating

ZHENG Wenzhong, HU Qiong, ZHANG Haoyu

Journal Article

Evaluation and Recombination of Property Right Configuration for Urban Water Supply System

Xiao Wen,Ouyang Fangrui,Wang Xianjia

Journal Article

Meshing stiffness property and meshing status simulation of harmonic drive under transmission loading

Journal Article