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Fabrication and catalytic performance of meso-ZSM-5 zeolite encapsulated ferric oxide nanoparticles for phenol hydroxylation

Zhenheng Diao, Lushi Cheng, Wen Guo, Xu Hou, Pengfei Zheng, Qiuyueming Zhou

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 3,   Pages 643-653 doi: 10.1007/s11705-020-1972-3

Abstract: An encapsulation-structured Fe O @meso-ZSM-5 (Fe@MZ5) was fabricated by confining Fe O nanoparticlesAmong the encapsulation-structured catalysts, Fe@MZ5 showed the highest phenol conversion and hydroquinoneBased on the above results, the structure-performance relationship of these new catalysts was preliminarily

Keywords： phenol hydroxylation     encapsulation structure     structure-performance relationship     meso-ZSM-5     ferric oxide    

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The effects of mismatch fracture properties in encapsulation-based self-healing concrete using cohesive-zone

Luthfi Muhammad MAULUDIN, Chahmi OUCIF, Timon RABCZUK

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3,   Pages 792-801 doi: 10.1007/s11709-020-0629-0

Abstract: Finite element analysis is developed to simulate the breakage of capsule in capsule-based self-healing concrete. A 2D circular capsule with different core-shell thickness ratios embedded in the mortar matrix is analyzed numerically along with their interfacial transition zone. Zero-thickness cohesive elements are pre-inserted into solid elements to represent potential cracks. This study focuses on the effects of mismatch fracture properties, namely fracture strength and energy, between capsule and mortar matrix into the breakage likelihood of the capsule. The extensive simulations of 2D specimens under uniaxial tension were carried out to investigate the key features on the fracture patterns of the capsule and produce the fracture maps as the results. The developed fracture maps of capsules present a simple but valuable tool to assist the experimentalists in designing appropriate capsule materials for self-healing concrete.

Keywords： self-healing concrete     interfacial zone     capsule materials     cohesive elements     fracture maps    

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Immobilization of

Xiaokai SONG,Zhongyi JIANG,Lin LI,Hong WU

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 3,   Pages 353-361 doi: 10.1007/s11705-014-1421-2

Abstract: Mesoporous silica particles were prepared for efficient immobilization of the -glucuronidase (GUS) through a biomimetic mineralization process, in which the solution containing lysozyme and GUS were added into the prehydrolyzed tetraethoxysilane (TEOS) solution. The silica particles were formed in a way of biomineralization under the catalysis of lysozyme and GUS was immobilized into the silica particles simultaneously during the precipitation process. The average diameter of the silica particles is about 200 nm with a pore size of about 4 nm. All the enzyme molecules are tightly entrapped inside the biosilica nanoparticles without any leaching even under a high ionic strength condition. The immobilized GUS exhibits significantly higher thermal and pH stability as well as the storage and recycling stability compared with GUS in free form. No loss in the enzyme activity of the immobilized GUS was found after 30-day’s storage, and the initial activity could be well retained after 12 repeated cycles.

Keywords： and recycling stability     silica nanoparticles     biocatalysis     biomimetic synthesis     β-glucuronidase encapsulation    

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Encapsulation of polyethylene glycol in cellulose-based porous capsules for latent heat storage and light-to-thermal

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 8,   Pages 1038-1050 doi: 10.1007/s11705-022-2279-3

Abstract: These capsules owned a typical core–shell structure, with an extremely high polyethylene glycol loading

Keywords： cellulose     polyelectrolytes     phase change materials     thermal energy storage     light-to-thermal conversion    

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The Architecture of a Product Collaborative Design Platform Based on Cloud Manufacturing

Wei Wei, Wang Yufei, Tao Yong

Strategic Study of CAE 2020, Volume 22, Issue 4,   Pages 34-41 doi: 10.15302/J-SSCAE-2020.04.014

Abstract:

Product design is crucial to improving product quality and lowering manufacturing costs. Cloud manufacturing is emerging as a new manufacturing model and an integrated technology and has become an important development direction for advanced manufacturing. To adapt to the transformation of traditional manufacturing to service-oriented and innovative manufacturing, this study investigates the current status of collaborative design and summarizes the problems regarding the sharing and on-demand use of massive resources in traditional manufacturing. It also proposes the architecture of a product collaborative design platform based on cloud manufacturing and explains the meaning of each layer in detail. Then three key technologies for building the platform are discussed: cloud manufacturing technology, product family and product platform technology, and product collaborative design technology. Finally, using a cloud-manufacturing-based product collaborative design platform system established by a company as an example, the system architecture and functions of the platform are analyzed, and the differences in task assign and completion time between cloud manufacturing and traditional manufacturing are compared. The effectiveness and superiority of the cloud manufacturing-based system are verified, and the application and research direction of the system are prospected.

Keywords： cloud manufacturing     collaborative design     product platform     resource encapsulation     platform architecture    

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Enzyme@bismuth-ellagic acid: a versatile platform for enzyme immobilization with enhanced acid-base stability

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 6,   Pages 784-794 doi: 10.1007/s11705-022-2278-4

Abstract: In situ encapsulation is an effective way to synthesize enzyme@metal–organic framework biocatalystsAfter encapsulation, the stability, especially the acid-base stability, of amyloglucosidases@bismuth-ellagicgreen precursor, simple and convenient preparation process provided a versatile strategy for enzymes encapsulation

Keywords： bismuth-ellagic acid     in situ encapsulation     enzyme@MOF biocomposites    

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Studies on preparation of folate-targeted boron liposomes as potential delivery agents for neutron capture therap

Wang Zhihui,Qin Linxue,Liu Dong

Strategic Study of CAE 2012, Volume 14, Issue 8,   Pages 78-81

Abstract:

To prepare folate-targeted liposomes with high encapsulation efficiencyThe content and the encapsulation efficiency of HBA,TBA or BBA liposomes are evaluated by high performanceAs the basis of the encapsulation efficiency, the optimal conditions for preparing liposomes were exploredThe encapsulation efficiency of HBA, TBA and BBA liposomes were 25.7 %, 38.9 % and 94.8 % at the optimal

Keywords： boron neutron capture therapy     liposomes     folate-targeted     encapsulation efficiency    

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Influence of pore structure on biologically activated carbon performance and biofilm microbial characteristics

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1419-1

Abstract:

• Pore structure affects biologically activated carbon performance.

Keywords： Granular activated carbon     Biologically activated carbon filter     Bacterial community structure     Porestructure    

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Hierarchical fractal structure of perfect single-layer graphene

T. Zhang, K. Ding

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 4,   Pages 371-382 doi: 10.1007/s11465-013-0279-1

Abstract:

The atomic lattice structure of perfect single-layer graphene that can actually be regarded as a kindof hierarchical fractal structure from the perspective of fractal geometry was studied for the firstThree novel and special discoveries on hierarchical fractal structure and sets were unveiled upon examinationThe interior fractal-type structure was discovered to be the fifth space-filling curve from physicalA fundamental example of a multi-fractal structure was also presented.

Keywords： hierarchical fractal structure     fractal dimension     the fifth space-filling curve     multi-fractal structure    

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Encapsulation of 2-amino-2-methyl-1-propanol with tetraethyl orthosilicate for CO2 capture

Sidra Rama, Yan Zhang, Fideline Tchuenbou-Magaia, Yulong Ding, Yongliang Li

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 4,   Pages 672-683 doi: 10.1007/s11705-019-1856-6

Abstract: Carbon capture is widely recognised as an essential strategy to meet global goals for climate protection. Although various CO capture technologies including absorption, adsorption and membrane exist, they are not yet mature for post-combustion power plants mainly due to high energy penalty. Hence researchers are concentrating on developing non-aqueous solvents like ionic liquids, CO -binding organic liquids, nanoparticle hybrid materials and microencapsulated sorbents to minimize the energy consumption for carbon capture. This research aims to develop a novel and efficient approach by encapsulating sorbents to capture CO in a cold environment. The conventional emulsion technique was selected for the microcapsule formulation by using 2-amino-2-methyl-1-propanol (AMP) as the core sorbent and silicon dioxide as the shell. This paper reports the findings on the formulated microcapsules including key formulation parameters, microstructure, size distribution and thermal cycling stability. Furthermore, the effects of microcapsule quality and absorption temperature on the CO loading capacity of the microcapsules were investigated using a self-developed pressure decay method. The preliminary results have shown that the AMP microcapsules are promising to replace conventional sorbents.

Keywords： carbon capture     microencapsulated sorbents     emulsion technique     low temperature adsorption and absorption    

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Floating forest: A novel breakwater-windbreak structure against wind and wave hazards

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 5,   Pages 1111-1127 doi: 10.1007/s11709-021-0757-1

Abstract: A novel floating breakwater-windbreak structure (floating forest) has been designed for the protectionThe modular arch-shaped concrete structure is positioned perpendicularly to the direction of the prevailingThe structure below the water surface acts as a porous breakwater with wave scattering capability.

Keywords： floating structure     breakwater     windbreak     hydrodynamic     CFD    

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Bicontinuous porous membranes with micro-nano composite structure using a facile atomization-assisted

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 8,   Pages 1268-1280 doi: 10.1007/s11705-022-2143-5

Abstract: The micro-nano composite structure can endow separation membranes with special surface properties, butusing this method, a bicontinuous porous microfiltration membrane with robust micro-nano composite structureThe formation mechanism of the micro-nano composite structure was proposed.

Keywords： atomization     nonsolvent induced phase separation     bicontinuous porous structure     micro-nano compositestructure     oil-water separation    

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Smart optical-fiber structure monitoring based on granular computing

Guan LU, Dakai LIANG,

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 4,   Pages 462-465 doi: 10.1007/s11465-009-0073-2

Abstract: self-diagnosing system in health monitoring has become an important direction of smart materials and structurethe requirement of damage detection by analyzing digital signals and character signals of the smart structurepaper investigates an optic fiber smart layer and presents a method for realizing optic fiber smart structureAfter the analysis, it is presumed that optic fiber smart structure monitoring based on granular computation

Keywords： smart material and structure     GrC     optical fiber sensor     rough set     clustering algorithm    

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Automated classification of civil structure defects based on convolutional neural network

Pierclaudio SAVINO, Francesco TONDOLO

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 305-317 doi: 10.1007/s11709-021-0725-9

Abstract: Today, the most commonly used civil infrastructure inspection method is based on a visual assessment conducted by certified inspectors following prescribed protocols. However, the increase in aggressive environmental and load conditions, coupled with the achievement of many structures of the life-cycle end, has highlighted the need to automate damage identification and satisfy the number of structures that need to be inspected. To overcome this challenge, this paper presents a method for automating concrete damage classification using a deep convolutional neural network. The convolutional neural network was designed after an experimental investigation of a wide number of pretrained networks, applying the transfer-learning technique. Training and validation were conducted using a database built with 1352 images balanced between “undamaged”, “cracked”, and “delaminated” concrete surfaces. To increase the network robustness compared to images in real-world situations, different image configurations have been collected from the Internet and on-field bridge inspections. The GoogLeNet model, with the highest validation accuracy of approximately 94%, was selected as the most suitable network for concrete damage classification. The results confirm that the proposed model can correctly classify images from real concrete surfaces of bridges, tunnels, and pavement, resulting in an effective alternative to the current visual inspection techniques.

Keywords： concrete structure     infrastructures     visual inspection     convolutional neural network     artificial intelligence    

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Catalyst particle shapes and pore structure engineering for hydrodesulfurization and hydrodenitrogenation

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 6,   Pages 897-908 doi: 10.1007/s11705-021-2127-x

Abstract: Catalyst particle shapes and pore structure engineering are crucial for alleviating internal diffusion

Keywords： hydrodesulfurization     hydrodenitrogenation     particle shape     pore structure    

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Title Author Date Type Operation

Fabrication and catalytic performance of meso-ZSM-5 zeolite encapsulated ferric oxide nanoparticles for phenol hydroxylation

Zhenheng Diao, Lushi Cheng, Wen Guo, Xu Hou, Pengfei Zheng, Qiuyueming Zhou

Journal Article

The effects of mismatch fracture properties in encapsulation-based self-healing concrete using cohesive-zone

Luthfi Muhammad MAULUDIN, Chahmi OUCIF, Timon RABCZUK

Journal Article

Immobilization of

Xiaokai SONG,Zhongyi JIANG,Lin LI,Hong WU

Journal Article

Encapsulation of polyethylene glycol in cellulose-based porous capsules for latent heat storage and light-to-thermal

Journal Article

The Architecture of a Product Collaborative Design Platform Based on Cloud Manufacturing

Wei Wei, Wang Yufei, Tao Yong

Journal Article

Enzyme@bismuth-ellagic acid: a versatile platform for enzyme immobilization with enhanced acid-base stability

Journal Article

Studies on preparation of folate-targeted boron liposomes as potential delivery agents for neutron capture therap

Wang Zhihui,Qin Linxue,Liu Dong

Journal Article

Influence of pore structure on biologically activated carbon performance and biofilm microbial characteristics

Journal Article

Hierarchical fractal structure of perfect single-layer graphene

T. Zhang, K. Ding

Journal Article

Encapsulation of 2-amino-2-methyl-1-propanol with tetraethyl orthosilicate for CO2 capture

Sidra Rama, Yan Zhang, Fideline Tchuenbou-Magaia, Yulong Ding, Yongliang Li

Journal Article

Floating forest: A novel breakwater-windbreak structure against wind and wave hazards

Journal Article

Bicontinuous porous membranes with micro-nano composite structure using a facile atomization-assisted

Journal Article

Smart optical-fiber structure monitoring based on granular computing

Guan LU, Dakai LIANG,

Journal Article

Automated classification of civil structure defects based on convolutional neural network

Pierclaudio SAVINO, Francesco TONDOLO

Journal Article

Catalyst particle shapes and pore structure engineering for hydrodesulfurization and hydrodenitrogenation

Journal Article