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Transient Polymer Hydrogels Based on Dynamic Covalent Borate Ester Bonds

Chinese Journal of Chemistry 2022年第23期40卷 2794-2800,I0002页

作者： Chunxiao Zhang Haoyue Lu Xu Wang Shenzhen Research Institute of Shandong University Shenzhen Guangdong 518057China National Engineering Research Centerfor Colloidal Materials School of Chemistry and Chemical EngineeringShandong University JinanShandong 250100China

In nature, biological systems maintain their unique structures and functions by using nonequilibrium processes driven by chemical fuels. Inspired by natural systems, transient hydrogel systems based on chemical reaction networks have been developed that are in thermodynamically nonequilibrium states. The formation of dynamic covalent bonds is an effective tool for designing analogous systems. Herein, we design a transient polymer hydrogel based on fuel-mediated covalent borate ester bonds. The pH-sensitive covalent borate ester bond is formed by the reaction between polyvinyl alcohol (PVA) and boric acid (B(OH)_(3)). Sodium hydroxide (NaOH) and 1,3-propanesulfonate (PrS) are used together as the chemical fuels to temporally control the pH of the system. Meanwhile, the lifetime of the transient hydrogel can be simply controlled by adjusting the composition of the chemical fuel, and the cyclic phase transitions can also be achieved. These programmable transient hydrogels have potential applications in the fields of information transmission and fluid guidance.

关键词： Polymers Gels nonequilibrium processes Transition states Borate ester bonds

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nonequilibrium Dynamics of Chemically Active Particles

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Chinese Journal of Chemistry 2022年第3期40卷 419-429页

作者： Huijun Jiang Zhonghuai Hou Hefei National Laboratory for Physical Sciences ot the Microscale&Technology of China HefeiAnhui 230026China

Chemically active motion is ubiquitous in many nature and artificial systems where each unit can move directionally by converting chemical energy into kinetic *** the systems are driven by activity far from equilibrium,many dynamical behaviors forbidden in equilibrium systems may be *** dynamics of such systems is then a hot multidisciplinary topic with great ***,we review our recent theoretical advances in some fundamental problems at the single active particle level,the collective behavior level,as well as in systems where active particles act as baths.

关键词： Statistical mechanics nonequilibrium processes Kinetics Chemically active particle Multiscale modeling

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Recent Progress of Fuel-Driven Temporary Materials

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Chinese Journal of Chemistry 2023年第23期41卷 3358-3372页

作者： Guangtong Wang Mengmeng Nan Kangle Guo Yaqi Pan Tao Jia Shaoqin Liu School of Medicine and Health Harbin Institute of TechnologyHarbinHeilongjiang150080 China College of Chemistry Chemical Engineering and Resource UtilizationNortheast Forestry UniversityHarbinHeilongjiang150040 China School of Life Science and Technology Harbin Institute of TechnologyHarbinHeilongjiang150000 China

Fuel-driven dissipative self-assembly,which is a well-established concept in recent years,refers to out-of-equilibrium molecular self-assembly initiated and supported by the addition of active molecules (chemical fuel).It widely exists in nature since many temporary,active micro- or nanostructures in living bodies are generated by the dissipative self-assembly of ***,the study on dissipative self-assembly provides a good opportunity to have an insight into the microscopic mechanism of living *** the meantime,dissipative assembly is thought to be a potential pathway to achieve dynamic,temporary supramolecular ***,a number of temporary materials have been developed with the aid of strategies for realizing dissipative *** of their properties,including solubility,stiffness,turbidity,color,or self-healing ability,change upon the addition of chemical fuel but spontaneously restore with chemical fuel *** dynamic of these materials brings them various unprecedented *** this review,the principles of fabricating a fuel-driven temporary material are first ***,recent examples of fuel-driven temporary materials are emphatically summarized,including gels,self-erased inks,nanoreactors,self-healing materials,nanochannels,and ***,the challenges of developing fuel-driven temporary materials and some perspectives on the function and application of such kind of materials are discussed.

关键词： Self-assembly nonequilibrium processes Temporary materials Chemical fuels Gels

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Programming Supramolecular Hydrogels by Constructing a Multibranch Selection Structure

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CCS Chemistry 2024年第8期6卷 1951-1964页

作者： Zhongrui Wang Ting Zhao Shenghao Yang Yuwen Meng Xu Wang National Engineering Research Center for Colloidal Materials School of Chemistry and Chemical EngineeringShandong UniversityJinanShandong 250100 Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education School of Chemistry and Chemical EngineeringShandong UniversityJinanShandong 250100

Developing chemical systems capable of executing multipath nonequilibrium processes provides valuable insights into the study of multistage dissipative structures in living ***,we report a nonequilibrium multipath evolution in a three-state supramolecular system,which is clarified by associating it with a multibranch selection *** system is constructed by synergistically combining an assembly-induced sol-gel transition with the color change of an acid-base *** on the initial condition and chemical fuel composition,this system can execute five distinct nonequilibrium *** addition,the set of structured programming can be replayed by repeatedly introducing the chemical *** is further utilized to explore the applications of information encryption and establish its *** findings offer novel avenues for future transient material design and may make significant contributions to systems chemistry.

关键词： supramolecular hydrogels nonequilibrium processes programmable self-assembly chemical fuels multibranch selection structure

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