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Largely reduced cross-plane thermal conductivity of nanoporous In

Dongchao XU, Quan WANG, Xuewang WU, Jie ZHU, Hongbo ZHAO, Bo XIAO, Xiaojia WANG, Xiaoliang WANG, Qing HAO

Frontiers in Energy 2018, Volume 12, Issue 1,   Pages 127-136 doi: 10.1007/s11708-018-0519-5

Abstract: In recent year, nanoporous Si thin films have been widely studied for their potential applications inAlong this line, a high thermoelectric figure of merit (ZT) is also anticipated for other nanoporousNumerous thermoelectric studies have been carried out on Si-based nanoporous thin films, whereas cost-effectiveIn this work, the cross-plane thermal conductivities of nanoporous In Ga N thin films with varied porousBased on the measurement results, remarkable phonon size effects can be found for a thin film with periodic

Keywords： nanoporous film     thermoelectrics     phonon     mean free path     diffusive scattering    

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Preparation of adsorptive nanoporous membrane using powder activated carbon: Isotherm and thermodynamic

Majid Peyravi

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 4,   Pages 673-687 doi: 10.1007/s11705-019-1800-9

Abstract: Adsorptive polyethesulfone (PES) membranes were prepared by intercalation of powder activated carbon (PAC) with and without functionalization. Accordingly, PAC was aminated with 1,5-diamino-2-methylpentane, and the physicochemical properties of the functionalized PAC were analyzed. Intercalation of PAC within the PES scaffold changed the porosity and mean pore size of the aminated membrane (AC-NH ) from 52.6% to 92.5% and from 22.6 nm to 3.5 nm, respectively. The effect of temperature on the performance of the modified membranes was monitored by the flux and chemical oxygen demand (COD) removal of leachate. At ambient temperature, the COD removal of the neat, AC-containing, and AC-NH membranes was 47%, 52%, and 58.5%, respectively. A similar increment was obtained for the membrane flux, which was due to the synergistic effect of the high porosity and large number of hydrophilic functional groups. The experimental leachate adsorption data were analyzed by Langmuir, Freundlich, and Dubinin- Radushkevich isotherm models. For all membranes, the significant thermodynamic parameters ( , , and ) were calculated and compared. The isosteric heat of adsorption was lower than 80 kJ∙mol , indicating that the interaction between the membranes and the leachate is mainly physical, involving weak van der Waals forces.

Keywords： amine functionality     nanoporous membrane     adsorption isotherm     thermodynamic parameters     landfill leachate    

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Progress in the Physisorption Characterization of Nanoporous Gas Storage Materials Review

Katie A. Cychosz,Matthias Thommes

Engineering 2018, Volume 4, Issue 4,   Pages 559-566 doi: 10.1016/j.eng.2018.06.001

Abstract:

Assessing the adsorption properties of nanoporous materials and determining their structural characterizationhave been achieved both in the knowledge of the adsorption and phase behavior of fluids in ordered nanoporousfew important and central features of the underlying adsorption mechanisms of fluids in a variety of nanoporous

Keywords： Adsorption     Characterization     High-pressure adsorption     Nanoporous materials    

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Transport in Nanoporous Media

Weiyao Zhu,Bin Pan,Zhen Chen,Wengang Bu,Qipeng Ma,Kai Liu,Ming Yue

Engineering 2024, Volume 32, Issue 1,   Pages 139-152 doi: 10.1016/j.eng.2023.05.014

Abstract:

Fluid flow at nanoscale is closely related to many areas in nature and technology, e.g., unconventional hydrocarbon recovery, carbon dioxide geo-storage, underground hydrocarbon storage, fuel cells, ocean desalination and biomedicine. At nanoscale, interfacial forces dominate over bulk forces, and nonlinear effects are important, which significantly deviate from conventional theory. During the past decades, a series of experiments, theory and simulations have been performed to investigate fluid flow at nanoscale, which has advanced our fundamental knowledge of this topic. However, a critical review is still lacking, which has seriously limited the basic understanding of this area. Therefore herein, we systematically review experimental, theoretical and simulation works on single- and multi- phases fluid flow at nanoscale. We also clearly point out the current research gaps and future outlook. These insights will promote the significant development of nonlinear flow physics at nanoscale and will provide crucial guidance on the relevant areas.

Keywords： Transport in nanoporous media     Multi-phase fluid dynamics     Nonlinear flow mechanisms     Nonlinear flow conservation    

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Building a Highly Stable Ultrathin Nanoporous Layer Assisted by Glucose for Desalination Article

Yanqiu Zhang, Fan Yang, Hongguang Sun, Yongping Bai, Songwei Li, Lu Shao

Engineering 2022, Volume 16, Issue 9,   Pages 247-255 doi: 10.1016/j.eng.2020.06.033

Abstract:

Although nanoporous membranes are of great interest in desalination, it is still challenging to constructhighly permeable nanoporous membranes with excellent rejections for an efficient desalination processIn this work, highly permeable nanoporous membranes were built from renewable resources, assisted by

Keywords： Nanoporous membrane     Renewable resources     Nanofiltration     Desalination     Glucose    

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Numerical simulation of liquid falling film on horizontal circular tubes

Fengdan SUN, Songlin XU, Yongchuan GAO

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 3,   Pages 322-328 doi: 10.1007/s11705-012-1296-z

Abstract: The objective of this study is to investigate numerically the flow characteristics of falling film onThe volume of fluid method is used to track the motion of liquid falling film and the gas-liquid interfaceThe velocity distribution and the film thickness characteristics on the top tube, some special flow characteristicsdistributions of the upper and lower parts of the tube are not strictly symmetric and non-uniform, 2) the filmare distinguished, and 5) the liquid feed height plays an important role on the formation of falling film

Keywords： falling film     horizontal tube     flow characteristics     film thickness     liquid feeder height    

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Experiment and optimal design of a collection device for a residual plastic film baler

Qi NIU,Xuegeng CHEN,Chao JI,Jie WU

Frontiers of Agricultural Science and Engineering 2015, Volume 2, Issue 4,   Pages 347-354 doi: 10.15302/J-FASE-2015077

Abstract: It is imperative to carry out research on residual plastic film collection technology to solve the seriousThe residual plastic film baler was designed as a package for film strip collection, cleaning and balingand the impurity of film package.The results show that the factors affecting the collection rate of residual film and the impurity ofwas 88.9% and the impurity of residual film package was 14.2% for the baler.

Keywords： residual film     collection device     collection rate of residual film     impurity of film package     optimization    

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Retrospect and Prospect of Study on Thin Film Lubrication

Ge Jianbin,Zhang Chaohui,Wen Shizhu

Strategic Study of CAE 2003, Volume 5, Issue 7,   Pages 84-89

Abstract:

Thin film lubrication (TFL) has been well studied as a new lubrication regime since the 90s of lastof TFL, which involves the origin of the TFL concept, advancement of measuring technique, TFL's film-forming

Keywords： thin film lubrication     ordered film     film thickness measurement     microstructure    

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Thin-liquid-film evaporation at contact line

Hao WANG, Zhenai PAN, Zhao CHEN

Frontiers in Energy 2009, Volume 3, Issue 2,   Pages 141-151 doi: 10.1007/s11708-009-0020-2

Abstract: regions: a nonevaporating region, where the liquid is adsorbed on the wall; a transition region or thin-filmThe thin liquid film, with thickness from nanometers up to micrometers, covering the transition regionIn this paper, a review was made of the researches on thin-liquid-film evaporation.The major characteristics of thin film, thin-film modeling based on continuum theory, simulations basedon molecular dynamics, and thin-film profile and temperature measurements were summarized.

Keywords： meniscus     thin film     contact line     disjoining pressure     evaporation    

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Surface-tailoring chlorine resistant materials and strategies for polyamide thin film composite reverse

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 5,   Pages 564-591 doi: 10.1007/s11705-021-2109-z

Abstract: Polyamide thin film composite membranes have dominated current reverse osmosis market on account of theirsusceptibility of polyamide toward chlorine attack has been regarded as the Achilles’s heel of polyamide thin filmThe advancement in the development of chlorine resistant polyamide thin film composite membranes is reviewed

Keywords： reverse osmosis     polyamide     thin film composite membranes     chlorine resistance     surface modification    

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Piezoelectric film-actuated motion platform with high resolution

HUA Shunming, ZHANG Hongzhuang, CHENG Guangming, FAN Zunqiang, LIU Jianfang

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 3,   Pages 265-269 doi: 10.1007/s11465-008-0041-2

Abstract: A piezoelectric film-actuated motion platform with high resolution, which can run in two directions within

Keywords： mathematical     stick-slip mechanism     piezoelectric film-actuated     analysis     terrific    

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Overcoming oral insulin delivery barriers: application of cell penetrating peptide and silica-based nanoporous

Huining HE, Junxiao YE, Jianyong SHENG, Jianxin WANG, Yongzhuo HUANG, Guanyi CHEN, Jingkang WANG, Victor C YANG

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 1,   Pages 9-19 doi: 10.1007/s11705-013-1306-9

Abstract: Oral insulin delivery has received the most attention in insulin formulations due to its high patient compliance and, more importantly, to its potential to mimic the physiologic insulin secretion seen in non-diabetic individuals. However, oral insulin delivery has two major limitations: the enzymatic barrier that leads to rapid insulin degradation, and the mucosal barrier that limits insulin’s bioavailability. Several approaches have been actively pursued to circumvent the enzyme barrier, with some of them receiving promising results. Yet, thus far there has been no major success in overcoming the mucosal barrier, which is the main cause in undercutting insulin’s oral bioavailability. In this review of our group’s research, an innovative silica-based, mucoadhesive oral insulin formulation with encapsulated-insulin/cell penetrating peptide (CPP) to overcome both enzyme and mucosal barriers is discussed, and the preliminary and convincing results to confirm the plausibility of this oral insulin delivery system are reviewed. In vitro studies demonstrated that the CPP-insulin conjugates could facilitate cellular uptake of insulin while keeping insulin’s biologic functions intact. It was also confirmed that low molecular weight protamine (LMWP) behaves like a CPP peptide, with a cell translocation potency equivalent to that of the widely studied TAT. The mucoadhesive properties of the produced silica-chitosan composites could be controlled by varying both the pH and composition; the composite consisting of chitosan (25 wt-%) and silica (75 wt-%) exhibited the greatest mucoadhesion at gastric pH. Furthermore, drug release from the composite network could also be regulated by altering the chitosan content. Overall, the universal applicability of those technologies could lead to development of a generic platform for oral delivery of many other bioactive compounds, especially for peptide or protein drugs which inevitably encounter the poor bioavailability issues.

Keywords： insulin     cell penetrating peptide     mucoadhesive composites     oral delivery    

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Heat and mass transfer of ammonia-water in falling film evaporator

Xianbiao BU, Weibin MA, Huashan LI

Frontiers in Energy 2011, Volume 5, Issue 4,   Pages 358-366 doi: 10.1007/s11708-011-0161-y

Abstract: investigate the performance of heat and mass transfer of ammonia-water during the process of falling filmSubsequently, a series of parameters, such as velocity, film thickness and concentration, etc., wereCalculated results show that the average velocity and the film thickness change dramatically at the entrancethat the roll-worked enhanced tube or other enhanced tube can reduce the concentration gradient in the film

Keywords： falling film evaporation     ammonia-water     heat and mass transfer    

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Dynamic analysis of free-surface thin film flows driven by gravity over undulated substrate

Zhaomiao LIU, Xin LIU, Guobin WANG, Hong LIAO,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 2,   Pages 219-225 doi: 10.1007/s11465-010-0010-4

Abstract: This paper studies thin film flows with free surfaces driven by gravity through two types of undulatedcommenced from Navier-Stokes equations and continuity equation, the exact numerical results of free-surface filmfrom the waviness of the substrate planes profile, height of the triangle plane, and change of the filmheight on film flow dynamics properties are shown.

Keywords： waviness     triangle height     film thickness     streamlines separation     vortex    

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Improved film evaporator for mechanistic understanding of microwave-induced separation process

Xin Gao, Dandan Shu, Xingang Li, Hong Li

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 4,   Pages 759-771 doi: 10.1007/s11705-019-1816-1

Abstract: Microwave-induced film evaporation separation process has been reported recently to separate the polarTo carry out these investigations, a novel microwave-induced falling film evaporation instrument wasimprovement of the enhancement effect of microwave-induced separation was observed based on the improved film

Keywords： process intensification     microwave     falling film evaporation     separation     azeotrope    

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Title Author Date Type Operation

Largely reduced cross-plane thermal conductivity of nanoporous In

Dongchao XU, Quan WANG, Xuewang WU, Jie ZHU, Hongbo ZHAO, Bo XIAO, Xiaojia WANG, Xiaoliang WANG, Qing HAO

Journal Article

Preparation of adsorptive nanoporous membrane using powder activated carbon: Isotherm and thermodynamic

Majid Peyravi

Journal Article

Progress in the Physisorption Characterization of Nanoporous Gas Storage Materials

Katie A. Cychosz,Matthias Thommes

Journal Article

Transport in Nanoporous Media

Weiyao Zhu,Bin Pan,Zhen Chen,Wengang Bu,Qipeng Ma,Kai Liu,Ming Yue

Journal Article

Building a Highly Stable Ultrathin Nanoporous Layer Assisted by Glucose for Desalination

Yanqiu Zhang, Fan Yang, Hongguang Sun, Yongping Bai, Songwei Li, Lu Shao

Journal Article

Numerical simulation of liquid falling film on horizontal circular tubes

Fengdan SUN, Songlin XU, Yongchuan GAO

Journal Article

Experiment and optimal design of a collection device for a residual plastic film baler

Qi NIU,Xuegeng CHEN,Chao JI,Jie WU

Journal Article

Retrospect and Prospect of Study on Thin Film Lubrication

Ge Jianbin,Zhang Chaohui,Wen Shizhu

Journal Article

Thin-liquid-film evaporation at contact line

Hao WANG, Zhenai PAN, Zhao CHEN

Journal Article

Surface-tailoring chlorine resistant materials and strategies for polyamide thin film composite reverse

Journal Article

Piezoelectric film-actuated motion platform with high resolution

HUA Shunming, ZHANG Hongzhuang, CHENG Guangming, FAN Zunqiang, LIU Jianfang

Journal Article

Overcoming oral insulin delivery barriers: application of cell penetrating peptide and silica-based nanoporous

Huining HE, Junxiao YE, Jianyong SHENG, Jianxin WANG, Yongzhuo HUANG, Guanyi CHEN, Jingkang WANG, Victor C YANG

Journal Article

Heat and mass transfer of ammonia-water in falling film evaporator

Xianbiao BU, Weibin MA, Huashan LI

Journal Article

Dynamic analysis of free-surface thin film flows driven by gravity over undulated substrate

Zhaomiao LIU, Xin LIU, Guobin WANG, Hong LIAO,

Journal Article

Improved film evaporator for mechanistic understanding of microwave-induced separation process

Xin Gao, Dandan Shu, Xingang Li, Hong Li

Journal Article