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covalent organic frameworks-incorporated thin film composite membranes prepared by interfacial polymerization for efficient CO_(2) separation

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Chinese Journal of Chemical Engineering 2022年第3期35卷 152-160页

作者： Haoqing Xu Wenyan Feng Menglong Sheng Ye Yuan Bo Wang Jixiao Wang Zhi Wang Chemical Engineering Research Center School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China Tianjin Key Laboratory of Membrane Science and Desalination Technology State Key Laboratory of Chemical EngineeringCollaborative Innovation Center of Chemical Science and EngineeringTianjin UniversityTianjin 300350China Life and Health Research Institute School of Chemistry and Chemical EngineeringTianjin University of TechnologyTianjin 300384China

Thin film composite(TFC)membranes with nanofillers additives for CO_(2)separation show promising applications in energy and environment-related ***,the poor compatibility between nanofillers and polymers in TFC membranes is the main *** this work,covalent organic frameworks(COFs,TpPa-1)with rich ANHA groups were incorporated into polyamide(PA)segment via in situ interfacial polymerization to prepare defect-free TFC membranes for CO_(2)/N_(2)*** formed covalent bonds between TpPa-1 and PA strengthen the interaction between nanofillers and polymers,thereby enhancing ***,the incorporated COFs disturb the rigid structure of the PA layer,and provide fast CO_(2)transfer *** incorporated COFs also increase the content of effective carriers,which enhances the CO_(2)facilitated ***,in CO_(2)/N_(2)mixed gas separation test,the optimal TFC(TpPa_(0.025)-PIP-TMC/m PSf)membrane exhibits high CO_(2)permeance of 854 GPU and high CO_(2)/N_(2)selectivity of 148 at 0.15 MPa,CO_(2)permeance of 456 GPU(gas permeation unit)and CO_(2)/N_(2)selectivity of 92 at 0.5 *** addition,the Tp Pa_(0.025)-PIP-TMC/m PSf membrane also achieves high permselectivty in CO_(2)/CH_(4)mixed gas separation ***,the optimal TFC membrane showes good stability in the simulated flue gas test,revealing the application potential for CO_(2)capture from flue gas.

关键词： covalent organic frameworks CO_(2)/N_(2)separation In situ interfacial polymerization Compatibility covalent bonds

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Conjugate ferrocene polymer derived magnetic Fe/C nanocomposites for electromagnetic absorption application

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Journal of Materials Science & Technology 2024年第8期175卷 125-131页

作者： Aming Xie Zhendong Ma Ziming Xiong Weijin Li Lai Jiang Qiu Zhuang Siyao Cheng Wei Lu School of Mechanical Engineering Nanjing University of Science&TechnologyNanjing 210094China State Key Laboratory of Explosion&Impact and Disaster Prevention&Mitigation Army Engineering University of PLANanjing 210007China School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China Shanghai Key Lab.of D&A for Metal-Functional Materials School of Materials Science&EngineeringTongji UniversityShanghai 201804China

Coordination bonds are relatively unstable compared to covalent bonds,and common carbon-based absorbing material precursors are bonded in the form of coordination *** this work,we have introduced ferrocene units into conjugated microporous polymers(CMP)in one step by Suzuki *** adjusting the proportion of ferrocene units,a series of magnetic Fe-C nanocomposites(Fe-P-XC)derived from conjugated ferrocene polymers without heteroatom doping(N,S,P,etc.)were *** Fe-P-2C composite has good absorption properties with minimum reflection loss at 4.4 GHz(-58.66 dB)and effective absorption bandwidth(EAB)of 6.28 GHz at 2.4 mm(11.72-18 GHz).Compared with the precursor materials formed by coordination bonds,the present work reveals the electromagnetic wave absorption mechanism of carbon-based materials without heteroatom doping through a simple and effective strategy.

关键词： covalent bonds Suzuki reaction Conjugated ferrocene polymers Electromagnetic wave absorption

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Effect of hydrogen fluoride and magnesium oxide on AZ31 Mg alloy/carbon fiber-reinforced plastic composite by thermal laser joining technique

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Journal of Magnesium and Alloys 2024年第7期12卷 2874-2889页

作者： Andrews Nsiah Ashong Barton Mensah Arkhurst Youn Seoung Lee Mok-Young Lee Jeoung Han Kim School of Materials Science&Engineering University of New South Wales SydneyNSW2052Australia Department of Information and Communication Engineering Hanbat National UniversityYuseong-guDaejeonSouth Korea Welding&joining research group steel solution research laboratoryPOSCOIncheonRepublic of Korea Department of Materials Science&Engineering Hanbat National UniversityYuseong-guDaejeonSouth Korea

Although hydrofluoric acid(HF)surface treatment is known to enhance the joining of metals with polymers,there is limited information on its effect on the joining of AZ31 alloy and carbon-fiber-reinforced plastics(CFRPs)through laser-assisted metal and plastic direct joining(LAMP).This study uses the LAMP technique to produce AZ31-CFRP *** joining process involves as-received AZ31,HFpretreated AZ31,and thermally oxidized HF-pretreated AZ31 alloy ***,the bonding strength of joints prepared with thermally oxidized AZ31 alloy sheets is examined to ascertain the combined effect of HF treatment and thermal oxidation on bonding *** microstructures,surface chemical interactions,and mechanical performances of joints are investigated under tensile shear *** factors,such as bubble formation,CFRP resin decomposition,and mechanical interlocking considerably affect joint ***,surface chemical interactions between the active species on metal parts and the polar amide along with carbonyl groups of polymer play a significant role in improving joint *** prepared with surface-pretreated AZ31 alloy sheets show significant improvements in bonding strength.

关键词： Thermal laser joining Thermal oxidation Hydrofluoric acid pretreatment Mechanical interlocking covalent bonds Chemical interactions

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covalent and Ionic Bonding between Tannin and Collagen in Leather Making and Shrinking:A MALDI-ToF Study

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Journal of Renewable Materials 2021年第8期9卷 1345-1364页

作者： Antonio Pizzi LERMAB-ENSTIB University of LorraineEpinal88000France

Collagen powder hydrolysates were reacted with a solution of commercial mimosa bark tannin *** mixture was prepared at ambient temperature and prepared at 80°C to determine what reactions,if any,did occur between the collagen protein through its amino acids and the polyphenolic condensed *** reaction products obtained were analyzed by matrix assisted laser desorption ionization time-of-flight(MALDI ToF)mass *** between the two materials did appear to occur,with the formation of a relatively small proportion of covalent and ionic linkages at ambient temperature but a considerable proportion of covalent linkages tannin-protein amino acids and the disappearance of ionic *** linkages between the two materials appeared to be by amination of the phenolic–OHs of the tannin by the amino groups of the non-skeletal side chains of arginine,and by esterification by the–COOH groups of glutamic and aspartic acid of the aliphatic alcohol-OH on the C3 site of the flavonoid units heterocycle of the *** proportion of covalent linkages increases markedly and predominate with increasing *** tightening of the tannin-protein covalent network formed may be an additional contributing factor both to leather wear resistance and performance as well to leather shrinking when this is subjected to excessive temperatures.

关键词： Leather collagen vegetal tannins tanning tannin-protein reactions covalent bonds leather cross-linking leather shrinkage MALDI

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Reactive nano-essential oils for sustained release of essential oils and application to wallpaper

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Chinese Chemical Letters 2022年第1期33卷 320-323页

作者： Qiulian Hao Huan Peng Ruichen Zhao Jianze Wang Zhiguo Lu Jingwen Wang Jie Shen Yunwei Niu Zuobing Xiao Guiying Liu Jifu Hao Xin Zhang School of Pharmaceutical Science Shandong First Medical University&Shandong Academy of Medical SciencesTaian 271016China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Department of Pediatrics Capital Medical University Affiliated Beijing Anzhen HospitalBeijing 100029China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China Shanghai Research Institute of Fragrance and Flavor Industry Shanghai 200232China School of Perfume and Aroma Technology Shanghai Institute of TechnologyShanghai 200233China

Essential oils are a volatile and aromatic substance with a variety of active biological ***,the excessive volatility and inconvenience of the use of essential oils limit their *** this study,we developed a reactive mesoporous silica nanoparticle(rMSNs)based on cyanuric chloride modification for essential oil encapsulation and commodity *** large pore volume and specific surface area of rMSNs facilitate the nanoparticles adhering to a large amount of essential oil and achieve the sustained release of essential oil,thus prolonging the fragrance retention time of essential *** reactive nanoessential oils can form covalent bonds with the wallpaper,thereby remarkably improving the adhesion of the reactive nano-essential oils on the wallpaper and preventing the reactive nano-essential oil from deadhering from the *** active nano essential oil simultaneously overcomes the intense volatility of the essential oil and inconvenience in use,has a simple preparation process and low cost,and has great application potential.

关键词： Reactive nano-essential oils Reactive mesoporous silica nanoparticles Slow-release of essential oils Application to wallpaper covalent bonds

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3D-printed self-healing,biodegradable materials and their applications

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Frontiers of Mechanical Engineering 2024年第3期19卷 1-22页

作者： Yu LI Guangmeng MA Fawei GUO Chunyi LUO Han WU Xin LUO MingtaoZHANG Chenyun WANG Qingxin JIN Yu LONG School of Mechanical Engineering Guangxi UniversityNanning 530004China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi UniversityNanning 530004China Institute of Laser Intelligent Manufacturing and Precision Processing School of Mechanical EngineeringGuangxi UniversityNanning 530004China College of Mechanical and Electrical Engineering Central South UniversityChangsha 410083China State Key Laboratory of Precision Manufacturing for Extreme Service Performance Central South UniversityChangsha 410083China

3D printing is a versatile technology capable of rapidly fabricating intricate geometric structures and enhancing the performance of flexible devices in comparison to conventional fabrication ***,3D-printed devices are susceptible to failure as a result of minuscule structural impairments,thereby impacting their overall *** utilization of self-healing,biodegradable materials in 3D printing holds immense potential for increasing the longevity and safety of devices,thereby expanding the application prospects for such ***,enhancing the self-repairing capability of devices and refining the 3D printing performance of self-healing materials are still considerable challenges that need to be addressed to achieve optimal *** paper reviews recent developments in the field of advancements in 3D printing using self-healing and biodegradable ***,it investigates self-healing and biodegradable materials that are compatible with 3D printing techniques,discussing their printability,material properties,and factors that influence print ***,it explores practical applications of selfhealing and biodegradable 3D printing technology in ***,it critically offers practical perspectives on this topic.

关键词： 3D printing self-healing biodegradable soft materials covalent bonds non-covalent bonds

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