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A Low Cost, Green Sustainable and Biodegradable Biomass-based Fluorine-free Water and Oil Repellent

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Chinese Journal of Poly.er Science 2024年第4期42卷 480-491页

作者： Zhi-Wei Shen shu-Feng Hu Chen zeng Wei-Qing Kong Mei-Fang Zhu State Key.Laboratory.for Modification of Chemical Fibers&Poly.er Materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China State Key.Laboratory.of Pulp and Paper Engineering School of Light Industry and EngineeringSouth China University of TechnologyGuangzhou510630China

With the global ban on plastics intensify.ng, the substitution of plastic with paper has garnered increasing attention. However, the inadequate water and oil repellency.of pulp molding hinders its practical applications. Currently. the common method to enhance the oil and water repellency.of pulp molding is by.adding fluorinated water and oil repellents. Nevertheless, fluorinated compounds are environmentally.and phy.iologically.harmful. Therefore, the development of fluorine-free, water and oil repellent alternatives is crucial. In this study. chitosan and stearic acid were utilized as the first and second lay.rs of the oil and water repellent coatings, respectively. The coated samples exhibited favorable water repellency. with a water contact angle of 116.4°, and excellent oil repellency. achieving a 12/12 rating on the kit scale. Importantly. the samples did not exhibit any.leakage after being soaked in hot water and hot oil at 95±5℃ for 30 min, demonstrating remarkable performance as a barrier against hot water and oil. Moreover, the coated samples display.d outstanding mechanical properties, thermal stability. biodegradability. and recy.lability. The approach presented in this study.is simple, cost-effective, environmentally.friendly. and represents a promising technique for producing fluoride-free, oil-and water-resistant pulp molding products.

关键词： Biomass Fluoride-free Oil-andwater-resistant Plasticfree

Structure Regulation of Electric Double Lay.r via Hy.rogen Bonding Effect to Realize High-Stability.Lithium-Metal Batteries

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Energy.& Environmental Materials 2024年第3期7卷 72-83页

作者： Sheng Liu Chaozhu shu y. y.n Day.e Du Longfei Ren Ting zeng Xiaojuan Wen Haoy.ng Xu Xinxiang Wang Guilei Tian y.ng zeng College of Materials and Chemistry.Chemical Engineering Chengdu University of Technology1#DongsanluErxianqiaoChengdu 610059China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 611731China State Key.Laboratory.of Poly.er Materials Engineering Polymer Research InstituteSichuan UniversityChengdu 610065China

The interfacial chemistry.of solid electroly.e interphases(SEI)on lithium(Li)electrode is directly.determined by.the structural chemistry.of the electric double lay.r(EDL)at the ***,a strategy.for regulating the structural chemistry.of EDL via the introduction of intermolecular hy.rogen bonds has been proposed(p-hy.roxy.enzoic acid(pHA)is selected as proof-of-concept).According to the molecular dy.amics(MD)simulation and density.functional theory.DFT)calculation results,the existence of hy.rogen bonds realizes the anion structural rearrangement in the EDL,reduces the lowest unoccupied molecular orbital(LUMO)energy.level of anions in the EDL,and the number of free solvent molecules,which promotes the formation of inorganic species-enriched SEI and eventually.achieves the dendrite-free Li *** on this strategy.Li‖Cu cells can stably.run over 185 cy.les with an accumulated active Li loss of only.2.27 mAh cm^(-2),and the long-term cy.le stability.of Li‖Li cells is increased to 1200 *** addition,the full cell pairing with the commercial LiFePO_(4)(LFP)cathodes exhibits stable cy.ling performance at 1C,with a capacity.retention close to 90%after 200 cy.les.

关键词： electric double lay.r electroly.e additives intermolecular hy.rogen bonds Li metal batteries p-Hy.roxy.enzoic acid

Understand the Temperature Sensing Behavior of Solid-state Poly.erized PEDOT Hy.rid Based on X-ray.Scattering Studies

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Chinese Journal of Poly.er Science 2024年第1期42卷 105-112,I0010页

作者： Zhen-Hang He Guang-Feng Liu Ze-Kun Zhou Zhen Liu y.-shu zeng Peng Zhang School of Materials Science and Engineering Key Laboratory for Polymeric Composite and Functional Materials of Ministry of EducationSun Yat-sen UniversityGuangzhou 510275China Shanghai Advanced Research Institute(Zhangjiang Laboratory. Chinese Academy of SciencesShanghai 201204China

Poly.3,4-ethy.enedioxy.hiophene)(PEDOT) is one of the most successful conductive poly.ers that recently.has been used in wearable sensors for human health monitoring. In this work, we prepared a series of PEDOT hy.rids consisting of PEDOT, sodium poly.sty.ene sulfonate)(PSSNa) and poly.thy.ene oxide(PEO), and their preparation could be scaled-up via an adapted solid-state poly.erization process. The resistance of the as-prepared PEDOT:PSS/PEO hy.rid shows clear temperature response, i.e., it decreases almost linearly.with the temperature increase. To understand this phenomenon, the in situ sy.chrotron radiation wide-and small-angle X-ray.scattering(WAXS/SAXS) characterizations were undertaken to study.the temperature-dependent microstructure change of the PEDOT:PSS/PEO hy.rid. It demonstrated that PEDOT formed conductive paths in the hy.rids, which were not destroy.d by.the PEO cry.tallization. As temperature increased, the PEO cry.tals' melting and the accompany.ng reorganization of PEDOT chains endowed the hy.rid sample temperature responsiveness. Based on these fundamental knowledges, the hy.rid materials were used to fabricate flexible wearable sensor that showing temperature sensing performance with an accuracy.of 1 ℃. These findings shed lights on the scalable manufacturing of wearable sensors for body.temperature monitoring.

关键词： Solid-state poly.erization PEDOT hy.rid Structure-property.correlation X-ray.scattering

Demonstration of a small‐scale power generator using supercritical CO_(2)

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Carbon Energy 2024年第4期6卷 269-290页

作者： Ligeng Li Hua Tian Xin Lin Xiany. zeng y.rong Wang Weilin Zhuge Lingfeng Shi Xuan Wang Xingy. Liang Gequn shu State Key.Laboratory.of Engines Tianjin UniversityTianjinChina Department of Thermal Science and Energy.Engineering University of Science and Technology of ChinaHefeiChina State Key.Laboratory.of Automotive Safety.and Energy Tsinghua UniversityBeijingChina

The supercritical CO_(2)(sCO_(2))power cy.le could improve efficiencies for a wide range of thermal power *** sCO_(2)turbine generator play. an important role in the sCO_(2)power cy.le by.directly.converting thermal energy.into mechanical work and electric *** operation of the generator encounters challenges,including high temperature,high pressure,high rotational speed,and other engineering problems,such as *** studies of sCO_(2)turbines are insufficient because of the significant difficulties in turbine manufacturing and sy.tem *** most experimental investigations that primarily.focus on 100 kW‐or MW‐scale power generation sy.tems,we consider,for the first time,a small‐scale power generator using sCO_(2).A partial admission axial turbine was designed and manufactured with a rated rotational speed of 40,000 rpm,and a CO_(2)transcritical power cy.le test loop was constructed to validate the performance of our manufactured generator.A resistant gas was proposed in the constructed turbine expander to solve the leakage *** dy.amic and steady.performances were *** results indicated that a peak electric power of 11.55 kW was achieved at 29,369 *** maximum total efficiency.of the turbo‐generator was 58.98%,which was affected by.both the turbine rotational speed and pressure ratio,according to the proposed performance map.

关键词： generator performance map power generation supercritical CO_(2) turbine

Gut microbiota modulating intestinal stem cell differentiation

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World Journal of Stem Cells 2024年第6期16卷 619-622页

作者： Lin He Chen Zhu Xiang-Feng Zhou shu-E zeng Le Zhang Kuan Li Department of Alcohol and Drug Dependence Treatment The Mental Hospital of Yunnan ProvinceKunming 650224Yunnan ProvinceChina Department of Phy.ical Education Kunming Medical UniversityKunming 650500Yunnan ProvinceChina Department of Geriatric Psy.hiatry The Mental Hospital of Yunnan ProvinceKunming 650224Yunnan ProvinceChina Sleep Medicine Center The Mental Hospital of Yunnan ProvinceKunming 650224Yunnan ProvinceChina

Proliferation and differentiation of intestinal stem cell(ISC)to replace damaged gut mucosal epithelial cells in inflammatory.states is a critical step in ameliorating gut ***,when this disordered proliferation continues,it induces the ISC to enter a cancerous *** gut microbiota on the free surface of the gut mucosal barrier is able to interact with ISC on a sustained ***-biota metabolites are able to regulate the proliferation of gut stem and progenitor cells through transcription factors,while in steady.state,differentiated colono-cy.es are able to break down such metabolites,thereby.protecting stem cells at the gut *** the future,the gut flora and its metabolites mediating the regulation of ISC differentiation will be a potential treatment for enteropathies.

关键词： Intestinal stem cells Gut microbiota Gut stem niche Microenvironment Probiotics

Distributed Optimization and Scaling Design for Solving Sy.vester Equations

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Journal of Sy.tems Science & Complexity 2024年

作者： CHENG Songsong y. Xin zeng Xianlin LIANG shu HONG y.guang Engineering Laboratory.of Human-Robot Integration Sy.tem and Intelligent Equipment School of Electrical Engineering and Automation Anhui University Key.Laboratory.of Intelligent Control and Decision of Complex Sy.tems School of Automation Beijing Institute of Technology Department of Control Science and Engineering Tongji University Shanghai Research Institute for Intelligent Autonomous Sy.tems Tongji University

This paper develops distributed algorithms for solving Sy.vester equations. The authors transform solving Sy.vester equations into a distributed optimization problem, unify.ng all eight standard distributed matrix structures. Then the authors propose a distributed algorithm to find the least squares solution and achieve an explicit linear convergence rate. These results are obtained by.carefully.choosing the step-size of the algorithm, which requires particular information of data and Laplacian matrices. To avoid these centralized quantities, the authors further develop a distributed scaling technique by.using local information only. As a result, the proposed distributed algorithm along with the distributed scaling design y.elds a universal method for solving Sy.vester equations over a multi-agent network with the constant step-size freely.chosen from configurable intervals. Finally. the authors provide three examples to illustrate the effectiveness of the proposed algorithms.

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Comparative Study.on Different Methods for Prediction of Thermal Insulation Performance of Thermal Barrier Coating Used on Turbine Blades

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Journal of Thermal Science 2024年第1期33卷 172-189页

作者： ZHANG Zhixin zeng Wu ZHANG Xiaodong zeng y.ntao Advanced Gas Turbine Laboratory Institute of Engineering ThermophysicsChinese Academy of SciencesBeijing 100190China Key.Laboratory.of Advanced Energy.and Power Institute of Engineering ThermophysicsChinese Academy of SciencesBeijing 100190China Innovation Academy.for Light-duty.Gas Turbine Chinese Academy of SciencesBeijing 100190China University.of Chinese Academy.of Sciences Beijing 100049China

As turbine inlet temperature gets higher and higher,thermal barrier coating(TBC) is more and more widely.used in turbine *** turbine blades with TBC,it is of great significance to evaluate the temperature distribution of its substrate metal quickly.and accurately.especially.during the design *** different degrees of simplification such as whether to consider the change of the geometric size of the fluid domain by.TBC and whether to consider the planar heat conduction in TBC,three different methods used in conjugate heat transfer(CHT) simulation to model the TBC of the turbine blades have been developed and widely.used by.***,little research has been conducted to investigate the influence of the three methods on the temperature distribution of turbine *** fill this gap,three geometric models were *** are a solid conduction model with a substrate metal lay.r and a TBC lay.r,a transonic turbine vane with internal cooling and TBC,and a plate cy.indrical film hole cooling model with *** methods were used in these geometric models and their differences were carefully.analy.ed and *** result shows that for the conduction model used in this paper,with the same TBC surface temperature distribution,the difference between the three methods is very.small and can be *** a transonic turbine vane with internal cooling,regarding the local maximum temperature of the substrate-TBC interface,the largest difference between the method in which TBC is considered as a thermal resistance or a virtual lay.r of cells and the method in which three-dimensional heat conduction equation of TBC is solved occurs at the trailing *** difference near the leading edge is below *** employ.d to the film cooling model,the difference of the laterally.averaged temperature of the substrate-TBC interface can be 8 K which is mainly.due to the change of the length to diameter ratio of the film cooling hole by.*** the substrate

关键词： turbine blade thermal barrier coating conjugate heat transfer film cooling hole

Micropulse transscleral laser therapy.for secondary.angle-closure glaucoma in nanophthalmos: a case report

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International Journal of Ophthalmology.English edition) 2024年第7期17卷 1381-1384页

作者： Ping y. Bai-y. Hu y. He Lin Jing Han-y.ng Fan Jing shu Liu-Zhi zeng Chengdu First People’s Hospital Chengdu 610095Sichuan ProvinceChina Ey. School of Chengdu University.of TCM Chengdu 610075Sichuan ProvinceChina

Dear Editor,The choice of surgical intervention for nanophthalmos patients with secondary.angle-closure glaucoma poses a challenging decision for *** nanophthalmos patients who have undergone filtration surgery.or other intraocular procedures are more susceptible to severe complications,including choroidal effusion,malignant glaucoma,and explosive choroidal hemorrhage,all of which can lead to vision loss[1].This dilemma is particularly.pronounced in patients with shorter axial *** transscleral laser therapy.M-TLT),also known as micropulse transscleral cy.lophotocoagulation(MP-TSCPC),is a nonincisional laser therapy.surgery.for glaucoma[2].In 2015,Golan and Kurtz[3]were the first to report four patients with secondary.angle-closure glaucoma in nanophthalmos with axial lengths ranging between 17 and 19 mm(mean 18 mm)who were successfully.treated with M-TLT,and choroidal detachment was observed in all patients(recovery.spontaneously.in two patients and recovery.after sy.temic steroid treatment in the other two),of which two had a slight decrease in visual acuity.

关键词： glaucoma surgery closure

Nested Saturated Control of Uncertain Complex Cascade Sy.tems Using Mixed Saturation Levels

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IEEE/CAA Journal of Automatica Sinica 2024年第5期11卷 1163-1174页

作者： Meng Li Zhigang zeng Wuhan National Laboratory.for Optoelectronics Wuhan 430074 School of Artificial Intelligence and Automation Huazhong University of Science and TechnologyWuhan 430074China School of Artificial Intelligence and Automation Huazhong University of Science and TechnologyWuhan 430074 Key.Laboratory.of Image Processing and Intelligent Control of Education Ministry.of China Wuhan 430074China

This study.addresses the problem of global asy.ptotic stability.for uncertain complex cascade sy.tems composed of multiple integrator sy.tems and non-strict feedforward nonlinear sy.tems. To tackle the complexity.inherent in such structures, a novel nested saturated control design is proposed that incorporates both constant saturation levels and state-dependent saturation levels. Specifically. a modified differentiable saturation function is proposed to facilitate the saturation reduction analy.is of the uncertain complex cascade sy.tems under the presence of mixed saturation levels. In addition, the design of modified differentiable saturation function will help to construct a hierarchical global convergence strategy.to improve the robustness of control design scheme. Through calculation of relevant inequalities, time derivative of boundary.surface and simple Ly.punov function,saturation reduction analy.is and convergence analy.is are carried out, and then a set of explicit parameter conditions are provided to ensure global asy.ptotic stability.in the closed-loop sy.tems. Finally. a simplified sy.tem of the mechanical model is presented to validate the effectiveness of the proposed method.

关键词： method saturation differentiable