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Water-Driven Malleable,Weldable and Eco-Friendly Recyclable Carbon Fiber Reinforced dynamic Composites

Chinese Journal of chemistry 2024年第5期42卷 516-522页

作者： Ping Yu Qirui Huang Yi Wang Wan Peng Zichen Jia Haiyue Wang Juanjuan Ma Chunyu Wang Xuzhou Yan School of Environmental and Chemical Engineering Jiangsu Key Laboratory of Function Control Technology for Advanced MaterialsJiangsu Ocean UniversityLianyungangJiangsu222005 China School of chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai200240 China

Traditional carbon fiber-reinforced polymers based on thermoset matrix have been extensively used in the fields of wind turbine blades,automotive sector,and aerospace,among many others.However,there is still a major challenge of recycling those polymers due to the high cost and adverse impacts on the environment.In this work,we apply a polyimine network as matrix,which possess considerable tensile and thermal properties,to prepare the carbon fiber reinforced polyimine materials with trifluoromethyl diphenoxybenzene units(CFRFP)using a prepreg-based compression molding method.The CFRFP can be reshaped or reprocessed by heat or with water rapidly,and exhibited multifunction,including welding,chemical recycling,etc.These unique findings gained from our study will facilitate the manufacturing capability and enrich the types of fiber-reinforced composites.

关键词： dynamic chemistry Green chemistry Fiber-reinforced composites Fluoropolyimine Welding Reshaping Recycling Renewable resources

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Progress in synthesis of highly crystalline covalent organic frameworks and their crystallinity enhancement strategies

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Chinese Chemical Letters 2022年第6期33卷 2856-2866页

作者： Liping Guo Jin Zhang Qi Huang Wei Zhou Shangbin Jin School of chemistry and Chemical Engineering Qilu University of Technology(Shandong Academy of Sciences)Ji’nan 250353China School of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an 710049China School of chemistry and Chemical Engineering Queen’s University BelfastBelfast BT71NNUnited Kingdom

Covalent organic frameworks(COFs) have been attracting growing concerns since the first report in2005. With the well-defined and ordered structures, COFs express big potential in mass transport, storage/separation and energy conversion applications. From the perspective of both theory and application,the construction of crystalline COFs with high quality and variety is highly worth to be devoted to. To give insight into the crystalline process of COFs and deeply understand the factors of COFs crystallization,this review was concentrated on the recent progress in construction of crystalline COFs. Accordingly, the types and crystallization process of COFs were summarized firstly. And then the factors on crystallinity and the measures for improving the crystallinity of COFs were classified and discussed in detail. Finally,the perspectives for the development of COFs in further was given at the end of this review.

关键词： Covalent organic frameworks Crystallization mechanism dynamic chemistry Layer stacking Linkage exchange Monomer exchange

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Highly Ordered Supramolecular Assembled Networks Tailored by Bioinspired H-Bonding Confinement for Recyclable Ion-Transport Materials

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CCS chemistry 2023年第6期5卷 1422-1432页

作者： Chen-Yu Shi Qi Zhang Bang-Sen Wang Dan-Dan He He Tian Da-Hui Qu Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research CenterInstitute of Fine ChemicalsFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237

Controlling dynamic molecular self-assembly to finely tune macroscopic properties offers chemical solutions to rational material design.Here we report that combining disulfide-mediated ring-opening polymerization withβ-sheet-like H-bonding self-assembly can drive a direct small-molecular assembly into a layered ionic network with precise architectural tunability and controllable functions as ion-transport membranes.This strategy enables a one-step evaporationinduced self-assembly from discrete small molecules to layered ionic networks with high crystallinity.The interlayer distances can be readily engineered with nanometer accuracy by varying the length of the oligopeptide side chain.The synergy of the layered structure and hydrophilic terminal groups facilitates the formation and ordering of interlayer water channels,endowing the resulting membranes with high efficiency in transporting ions.Moreover,the inherent dynamic nature of poly(disulfide)s allows chemical recycling to monomers under mild conditions.We foresee that the robust strategy of combining dynamic disulfide chemistry and noncovalent assembly can afford many opportunities in designing smart materials with unique functions and applications.

关键词： dynamic chemistry poly(disulfide)s β-sheet-like H-bonds ion conductivity chemical recyclability

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Construction of 2+3 and 3+3 COFs based on CTV derivatives

Construction of 2+3 and 3+3 COFs based on CTV derivatives

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中国化学会全国第十二届有机合成化学学术研讨会

作者： Zhen,Jing-Ru Ding,San-Yuan Liu,Jun-Min Wang,Wei Huang,Zhi-Tang Zheng,Qi-Yu Laboratory for Molecular Sciences (BNLMS) CAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of Sciences

Covalent organic frameworks(COFs) are a class of crystalline porous organic materials linked by strong covalent bonds. In 2005,Yaghi and his co-workers demonstrated the utility of the topological design principle in their synthesis of the first successful examples of COFs. Cyclotriveratrylene(CTV) is a C3 symmetrical,rigid macrocyclic molecule with a bowl-shaped shallow cavity which can be utilized to construct 3+2 and 3+3 COFs. Here we have synthesized a series of a CTV based covalent organic framewoks(COFs),aCTV-COF1 to aCTV-COF7 through dynamic chemistry and their different properties were studied.

关键词： Covalent organic frameworks（COFs） Cyclotriveratrylene（CTV） dynamic chemistry

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