检索结果-南通市图书馆

Tannic acid and silicate-functionalized polyvinyl alcohol-hyaluronic acid hydrogel for infected diabetic wound healing

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Regenerative Biomaterials 2024年第4期3卷 125-137页

作者： Zhentian Diao Longkang Li Huan Zhou Lei Yang School of Materials science and engineering Hebei University of TechnologyTianjin 300131China Center for health science and engineering Hebei Key Laboratory of Biomaterials and Smart TheranosticsSchool of Health Sciences and Biomedical EngineeringHebei University of TechnologyTianjin 300131China

Healing of chronic diabetic wounds is challenging due to complications of severe inflammatory microenvironment,bacterial infection and poor vascular ***,a novel injectable polyvinyl alcohol-hyaluronic acid-based composite hydrogel was developed,with tannic acid(TA)and silicate functionalization to fabricate an‘all-in-one’hydrogel *** one hand,after being locally injected into the wound site,the hydrogel underwent a gradual sol-gel transition in situ,forming an adhesive and protective dressing for the *** of rheological characteristics,mechanical properties and swelling ability of PTKH could be performed via regulating TA and silicate content in *** the other hand,PTKH was capable of eliminating reactive oxygen species overexpression,combating infection and generating a cell-favored microenvironment for wound healing acceleration in *** animal studies demonstrated that PTKH could greatly stimulate angiogenesis and epithelization,accompanied with inflammation and infection risk ***,in consideration of its impressive in vitro and in vivo outcomes,this‘all-in-one’multifunctional hydrogel may hold promise for chronic diabetic wound treatment.

关键词： diabetic wound healing ROS overexpression combating infection stimulate angiogenesis

Thin-film flow technology in controlling the organization of materials and their properties Special Collection:Distinguished Australian Researchers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Aggregate

Aggregate 2024年第1期5卷 115-129页

作者： Clarence Chuah Xuan Luo Javad Tavakoli Youhong Tang Colin L.Raston Flinders Institute for Nanoscale science and Technology College of Science and EngineeringFlinders UniversityAdelaideSouth AustraliaAustralia Centre for health Technologies School of Biomedical EngineeringFaculty of Engineering and Information TechnologyUniversity of Technology SydneySydneyNew South WalesAustralia

Centrifugal and shear forces are produced when solids or liquids *** systems and devices that use these forces,such as dynamic thin-film flow technology,are evolving continuously,improve material structure-property relationships at the nanoscale,representing a rapidly thriving and expanding field of research high with green chemistry metrics,consolidated at the inception of *** vortex fluidic device(VFD)provides many advantages over conventional batch processing,with fluidic waves causing high shear and producing large surface areas for micro-mixing as well as rapid mass and heat transfer,enabling reactions beyond diffusion *** these abilities allows for a green and innovative approach to altering materials for various research and industry applications by controlling small-scale flows and regulating molecular and macromolecular chemical reactivity,self-organization phenomena,and the synthesis of novel *** review highlights the aptitude of the VFD as clean technology,with an increase in efficiency for a diversity of top-down,bottom-up,and novel material transformations which benefit from effective vortex-based processing to control material structure-property relationships.

关键词： material nanoscale structure-property relationship thin film flow technology vortex fluidic device

Microwave excited hyperthermy and catalysis of heterostructured Au/Cu–BTA for effective bacteria killing by accelerating charge separation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第10期43卷 5186-5201页

作者： Wen-Jing Zhang Li-Guo Jin Shui-Lin Wu Chao-Feng Wang Yu-Feng Zheng Zhao-Yang Li Zhen-Duo Cui Hui Jiang Sheng-Li Zhu Xiang-Mei Liu School of Materials science and engineering the Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of ChinaTianjin University biomedical Materials engineering Research Center Hubei Key Laboratory of Polymer MaterialsMinistry-of-Education Key Laboratory for the Green Preparation and Application of Functional MaterialsSchool of Materials Science&EngineeringHubei University School of Materials science and engineering Peking University School of health science and biomedical engineering Hebei University of Technology

Deep tissue infections caused by pathogenic bacteria seriously threat the lives of *** this study a smart heterostructured Au/Cu-BTA （BTA=1,2,4,5-benzenetetramine） with microwave （MW） response is synthesized via NaBH4reduction of HAuCl4on the ***/Cu-BTA exhibits excellent hyperthermy and dynamics under MW *** MW thermal mechanism of Au/Cu-BTA is attributed to the excellen dielectric loss and polarization of the heterogeneous ***,the surface energy levels of the Cu-BTA interface alleviate the difficulty of electron hopping through multistage ***,MW can excite Cu-BTA to produce free ***,Au nanoparticles rapidly increase electron transfer and inhibit electron-hole ***,the yields of reactive oxygen species can be enhanced for MW dynamic therapy Consequently,under 10 min of MW irradiation,Au/Cu-BTA killed 99.998%±0.001% of Gram-positive Staphylococcus aureus,99.966%±0.014% of methicillin-resistant Staphylococcus aureus,and 96.871%±0.831% of Gram-negative Pseudomonas *** effective MW bacteria-killing strategy designed in this study shows significant potential for application in the MW-responsive treatment of deep tissue infections without antibiotics.

关键词： Anti-infection Antibacterial Microwave therapy

Modification of LiMn_(0.6)Fe_(0.4)PO_(4)lithium-ion battery cathode materials with a fluorine-doped carbon coating

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Particuology 2024年第9期92卷 278-287页

作者： Debao Pan Ziyuan Liu Chengping Li Rundong Wan Jinsong Wang Jiangzhao Chen Ding Wang Jinkun Liu Yingjie Zhang Jianhong Yi Rui Bao Zhengfu Zhang Peng Dong faculty of Materials science and engineering Kunming University of Science and TechnologyKunming 650093China faculty of Metallurgical and Energy engineering Kunming University of Science and TechnologyKunming 650093China

In this study,glucose and NH4F were utilized as sources of carbon and fluorine,respectively,for the synthesis of LiMn_(0.6)Fe_(0.4)PO_(4)(LMFP)*** nanoscales were subsequently modified with varying levels of fluorine-doped carbon through co-precipitation and mechanical ball milling *** LMFP,incorporating carbon and varying levels of fluoride ions,exhibit higher specific discharge capacities at 0.2 Cand electrochemical characteristics compared to the original LMFP coated solely with *** inclusion of fluorine-doped carbon in the composite material creates numerous pathways for expeditious electron ***,the partial formation of metal fluoride at the interface between the surface of LMFP and the layer of carbon coating doped with fluorine enhances the reduction in the charge-transfer *** modified ferromanganese phosphate cathode material reveals an outstanding discharge capacity displaying a reversible discharge specific capacity value of 131.73 mA h g^(−1)at 10C and 154.6 mA h g^(−1)at 0.2C,due to its unique structure.

关键词： Lithium manganese iron phosphate Anode Electrochemical Fluorine-doped carbon

Highly efficient recovery of waste LiNi_(x)Co_(y)Mn_(z)O_(2) cathode materials using a process involving pyrometallurgy and hydrometallurgy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Environmental science & engineering 2024年第2期18卷 149-160页

作者： Tianwei Zhang Juanye Dao Jinsong Wang Yuzhong Guo Rundong Wan Chengping Li Xian Zhou Zhengfu Zhang faculty of Materials science and engineering Kunming University of Science and TechnologyKunming 650093China

Substantial environmental and economic benefits can be achieved by recycling used lithium-ion batteries. Hydrometallurgy is often employed to recover waste LiNi_(x)Co_(y)Mn_(z)O_(2) cathode materials. As Ni, Co and Mn are transition metals, they exhibit similar properties;therefore, separating them is difficult. Thus, most researchers have focused on leaching processes, while minimal attention has been devoted to the separation of valuable metals from waste LiNi_(x)Co_(y)Mn_(z)O_(2) cathode materials. Herein, we propose an environment-friendly, gentle process involving the usage of pyrometallurgy and hydrometallurgy to gradually leach valuable metals and effectively separate them. Interestingly, Li is recovered through a reduction roasting and water leaching process using natural graphite powder, Ni and Co are recovered through ammonia leaching and extraction processes and Mn is recovered through acid leaching and evaporation–crystallization processes. Results show that ~87% Li, 97.01% Co, 97.08% Ni and 99% Mn can be leached using water, ammonia and acid leaching processes. The result obtained using the response surface methodology shows that the concentration of (NH4)2SO3 is a notable factor affecting the leaching of transition metals. Under optimal conditions, ~97.01% Co, 97.08% Ni and 0.64% Mn can be leached out. The decomposition of LiNi_(x)Co_(y)Mn_(z)O_(2) is a two-step process. This study provides valuable insights to develop an environment-friendly, gentle leaching process for efficiently recycling valuable metals, which is vital for the lithium-ion battery recycling industry.

关键词： Waste LiNixCoyMnzO2 cathode materials Leaching Effective separation Series process

Cooperative control for heterogeneous multi-agent systems: progress, applications, and challenges

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

science China(Information sciences) 2024年第5期67卷 318-320页

作者： Bing YAN Peng SHI Jonathon CHAMBERS School of Electrical and Mechanical engineering Faculty of Science Engineering and TechnologyThe University of Adelaide School of engineering College of Science and Engineering University of Leicester

Cooperative control for heterogeneous multi-agent systems(MASs) is a critical and rapidly evolving field in modern automation and robotics. Characterized by the integration of agents with diverse capabilities and func... 详细信息

关键词： Multi agent systems

Microstructures and Properties of biomedical Mg-Zn-Sn-Zr Rolled Alloys

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials science) 2024年第3期39卷 766-773页

作者：周生刚 ZHANG Daxin XU Yang DUAN Jihao LI Tao LIU Junfeng WANG Peng 曹勇 faculty of Material science and engineering Kunming University of Science and TechnologyKunming 650093China

The as-cast Mg-2.0Zn-1.5Sn-xZr(x=0,0.4,0.6,0.8,1.0 wt%)alloy was rolled with the pressure less than 5%each *** microstructure,mechanical properties,corrosion properties and biocompatibility of the alloy were *** microstructure of the alloy was observed and analyzed by scanning electron microscope,and the tensile test was carried out by universal tensile *** corrosion resistance of the alloy in Hank's solution was studied by hydrogen evolution experiment and electrochemical test,and the biocompatibility of the alloy was tested by L929 *** results show that Mg-2Zn-1.5Sn-xZr alloy has excellent mechanical *** elongation of Mg-2Zn-1.5Sn-xZr alloy decreases with the increase of Zr content,but the tensile strength first increases and then decreases with the increase of Zr *** the Zr content is 0.8 wt%,the maximum tensile strength of the alloy is 235 *** results of hydrogen evolution experiment and electrochemical analysis show that the corrosion resistance of the alloy is the best when the Zr content is 0.8 wt%,and all the five alloys have high *** conclusion,the rolled alloy has good properties and has broad application prospects in the field of biomaterials.

关键词： magnesium alloy corrosion performance mechanical properties biocompatibility

维普期刊数据库

Displacement-pressure biparametrically regulated softness sensory system for intraocular pressure monitoring

在线全文

学校读者我要写书评

暂无评论

National science Review 2024年第6期11卷 159-168页

作者： Yu Cheng Yifei Zhan Fangyi Guan Junli Shi Jingxiao Wang Yi Sun Muhammad Zubair Cunjiang Yu Chuan Fei Guo Department of Materials science and engineering Southern University of Science and Technology Department of engineering science and Mechanics Pennsylvania State University Department of biomedical engineering Pennsylvania State University Department of Materials science and engineering Materials Research Institute Pennsylvania State University

High intraocular pressure(IOP) is one of the high-risk pathogenic factors of glaucoma. Existing methods of IOP measurement are based on the direct interaction with the cornea. Commercial ophthalmic tonometers based on snapshot measurements are expensive, bulky, and their operation requires trained *** contact lenses are easy to use, but they may block vision and cause infection. Here, we report a sensory system for IOP assessment that uses a soft indentor with two asymmetrically deployed iontronic flexible pressure sensors to interact with the eyelid-eyeball in an eye-closed situation. Inspired by human fingertip assessment of softness, the sensory system extracts displacement-pressure information for soft evaluation, achieving high accuracy IOP monitoring(>96%). We further design and custom-make a portable and wearable ophthalmic tonometer based on the sensory system and demonstrate its high efficacy in IOP screening. This sensory system paves a way towards cost-effective, robust, and reliable IOP monitoring.

关键词： intraocular pressure tonometer deep learning softness iontronic sensor

Highly enhanced thermoelectric and mechanical performance of copper sulfides via natural mineral in-situ phase separation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2024年第5期13卷 641-651页

作者： Xi Yan Hongjiang Pan Yixin Zhang Tianyu Yang Yangwei Wang Kun Huang Chongyu Wang Jing Feng Zhenhua Ge faculty of Materials science and engineering Kunming University of Science and TechnologyKunming 650093China

In situ phase separation precipitates play an important role in enhancing the thermoelectric properties of copper sulfides by suppressing phonon *** this study,Cu1.8S composites were fabricated by melting reactions and spark plasma *** complex structures,namely,micron-PbS,Sb_(2)S_(3),nano-FeS,and multiscale pores,originate from the introduction of FePb_(4)Sb_(6)S_(14)into the Cu1.8S *** effective element(Fe)doping and multiscale precipitates,the Cu_(1.8)S+0.5 wt%FePb_(4)Sb_(6)S_(14)bulk composite reached a high dimensionless figure of merit(ZT)value of 1.1 at 773 ***,the modulus obtained for this sample was approximately 40.27 GPa,which was higher than that of the pristine *** study provides a novel strategy for realizing heterovalent doping while forming various precipitates via in situ phase separation by natural minerals,which has been proven to be effective in improving the thermoelectric and mechanical performance of copper sulfides and is worth promoting in other thermoelectric systems.

关键词： in situ precipitates jamesonite natural mineral thermoelectric copper sulfides