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Self-healing polymeric Hydrogels:Toward Multifunctional Soft Smart materials

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Chinese Journal of Polymer Science 2021年第10期39卷 1262-1280,I0006页

作者： Xiao-Ling Zuo Shao-Fan Wang Xiao-Xia Le Wei Lu Tao Chen College of materials Science and Engineering Guizhou Minzu UniversityGuiyang 550025China Key laboratory of Bio-Based polymeric materials Technology and Application of Zhejiang Province Ningbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingbo 315201China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China

The concept of self-healing that involves a built-in ability to heal in response to damage wherever and whenever it occurs in a material,analogous to the healing process in living organisms,has emerged a couple of decades *** primarily by the demands for life-like materials and soft smart materials,therefore,the development of self-healing polymeric hydrogels has continually attracted the attention of the scientific ***,this review is intended to give an in-depth overview of the state-of-the-art advances in the field of self-healing polymeric ***,recently emerging trends in self-healing polymeric hydrogels are summarized,and notably,recommendations to endow these hydrogels with fascinating multi-functionalities including luminescence,conductivity/magnetism and shape memory etc are *** close,the current challenges and future opportunities in this field are also discussed.

关键词： polymeric hydrogels Self-healing Multi-functionalities Smart materials

AIE probes towards biomolecules: the improved selectivity with the aid of graphene oxide

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Science China Chemistry 2015年第12期58卷 1800-1809页

作者： Qianqian Li Zhen Li Hubei Key laboratory on Organic and polymeric Opto-Electronic materials

Fluorescence probes with aggregation-induced emission(AIE) property have attracted much research interest and have been identified as novel fluorescence biosensors with "turn-on" response. In this mini review, we present an overview of the recent work on improving the selectivity of AIE biosensors with the aid of graphene oxide(GO), according to the displacement strategy.

关键词： aggregation-induced emission biosensor selectivity graphene oxide displacement strategy

The Effect of NMR Setting Parameters on Molecular Weight Determination of Polyether Diols

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Chinese Journal of Polymer Science 2024年第11期42卷 1730-1737,I0010页

作者： Shu-Jie Huang Xiao-Hong Li Ying-Feng Tu Jiangsu Engineering laboratory of Novel Functional polymeric materials State and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou215123China

Nuclear magnetic resonance(NMR)is an advanced technique for the molecular weight(MW)determination of polymers at quantitative *** this study,we investigate the effect of liquid^(1)H-NMR instrumental setting parameters on the MW determination of polyether diols,namely poly(ethylene glycol)(PEG)and poly(tetramethylene oxide)(PTMO)diols,using hydroxymethylene groups as *** results show that the protons in chain-ends have larger spin-lattice relaxation time(T_(1))than those in main *** let most of the excited protons relax to the equilibrium state,the delay time(d_(1))should be much larger than T_(1)of ***^(13)C decoupling is inactive,the relative errors can be greater than 60%,due to the^(13)C-coupled proton satellite peaks,which can overlap with chain-end groups or be misassigned as *** optimal quantitative NMR conditions for the MW estimation of polyethers are revealed below:standard pulse with inverted gated^(13)C decoupling pulse sequence,32 scans,2.0 s acquisition time in 90 degree of flip angle and 30 s d_(1).The MWs determined from^(1)H quantitative NMR are all smaller than those from SEC which are relative to polystyrene(PS)standards,since the size of polyether chains is larger than that of PS with the same *** addition,the MW obtained from SEC for PTMOs shows larger overestimation than PEGs,suggesting PEG chains are more flexible than PTMO’s.

关键词： End-group analysis Molecular weight NMR Polyether Decoupling

SYNERGISTIC EFFECTS OF NOVOLAC-BASED CHAR FORMER WITH A PHOSPHORUS/NITROGEN-CONTAINING FLAME RETARD ANT IN POLYAMIDE 6

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Chinese Journal of Polymer Science 2012年第1期30卷 72-81页

作者： Wei-cheng Xiong Li Chen De-yi Wang Fei Song Yu-zhong Wang Center for Degradation an-d Flame--Retardant polymeric materials College of-Chemistry State Key Laboratory of Polymer Materials Engineering National Engineering Laboratory of Eco-Friendly Polymeric Materials （Sichuan） Sichuan University Chengdu 610064 China

The synergistic effect of phosphorus oxynitride（PON） with a novolac-based char former modified by salification （NA-metal salt） on the flame retardance of polyamide 6（PA6） was *** this purpose,various flame-retardant PA6 systems were melt-compounded with PON,PON/NA,PON/NA-V_2O_5 and PON/NA-Fe_2O_3,and their flame retardance was evaluated by measuring the limiting oxygen index（LOI） values and UL-94 vertical burning *** results showed that,compared with the PA6/PON/NA system,the combination of two char formers（NA-V_2O_5,NA-Fe_2O_3） with PON could obviously improve the char formation and flame retardance of *** flame retardance and cone calorimetric analyses showed the stronger synergism as well as the better flame retardant performance of PON/NA-Fe_2O_3 flame retardant system. The effects of different char formers on the flame retardance and thermal stability of this system were also discussed.

关键词： Polyamide Flame retardance Novolac resin Synergistic effect

Synthesis, Self-assembly and pH Sensitivity of a Novel Fluorinated Triphilic Block Copolymer

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Chinese Journal of Polymer Science 2017年第11期35卷 1363-1372页

作者：李欣欣 Xiao Huo Hui-jiao Han 林绍梁 Key laboratory of Specially Functional polymeric materials and Related Technology of the Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Key laboratory of Advanced polymeric materials East China University of Science and Technology

A novel fluorinated triblock copolymer incorporating 2-ethylhexyl methacrylate （EHMA）, tert-butyl methacrylate （tBMA） and 1H,1H,2H,2H-perfluorodecyl acrylate （FA）（PEHMA-b-PtBMA-b-PFA） was first synthesized using three successive reversible addition fragmentation chain transfer （RAFT） polymerization and the subsequent hydrolyzing at acidic condition. The as-fabricated triblock copolymer exhibited an interesting morphology evolution from the multi-compartment rod-like structure to spherical structure along with the addition of a selective solution. At the same time, a visible phase separation domain could be seen in the core area due to the existence of fluorocarbon segments. Furthermore, the self- assembly behavior of the triphilic copolymer at different pH was also verified by transmission electron microscopy, as well as the dynamic light scattering. These stimuli-responsive multi-compartment nanostructures may have potential applications in drug delivery.

关键词： Triphilic block copolymer Self-assembly pH sensitivity Fluorinated copolymer Multi-compartment structure

Multifunctional protective aerogel with superelasticity over−196 to 500℃

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Nano Research 2022年第9期15卷 7797-7805页

作者： Bo-Wen Liu Min Cao Yi-Ying Zhang Yu-Zhong Wang Hai-Bo Zhao The Collaborative Innovation Center for Eco-Friendly and Fire-Safety polymeric materials(MoE) National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan)State Key Laboratory of Polymer Materials EngineeringCollege of ChemistrySichuan UniversityChengdu 610064China

Protective materials that possess superelasticity and multifunctionality over a broad temperature range are urgently needed in various advanced ***,under harsh work conditions,the performance of current materials may largely deteriorate to lose protective ***,we report a bidirectionally oriented multi-walled carbon nanotubes(MWCNTs)-reinforced chitosan carbon aerogel(CS-MWCNT)that possesses superelasticity,high electromagnetic interference shielding,thermal insulation,and infrared stealth at both low temperatures(such as liquid nitrogen)and high temperatures(such as alcohol flames).Highly oriented lamellar arch structures combined with an MWCNTs-reinforced carbon skeleton act as elastic segments to disperse the stress during compression and endow CS-MWCNT with the ability to recover to almost the original size after being compressed at−196-500℃.The lamellar structures make CS-MWCNT thermally insulating and infrared stealth with a low thermal conductivity of~0.03 W/(m·K).Furthermore,a high electromagnetic interference(EMI)shielding effect of 64 dB is realized via an absorption-dominant EMI shielding mechanism derived from the successive inherently conductive carbon lamella,and the EMI shielding performance is largely maintained after treatment under extreme conditions like low temperature,high temperature,as well as cyclic *** work provides a new strategy for the development of temperature-invariant multifunctional aerogels for harsh environment applications.

关键词： superelasticity electromagnetic interference shielding heat insulation infrared stealth extreme environment

Multifunctional interlayer with simultaneously capturing and catalytically converting polysulfides for boosting safety and performance of lithium-sulfur batteries at high-low temperatures

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Journal of Energy Chemistry 2020年第11期29卷 248-259页

作者： Xiao-Shuan Chen You Gao Guo-Rui Zhu Hui-Jun Chen Si-Chong Chen Xiu-Li Wang Gang Wu Yu-Zhong Wang Collaborative Innovation Center for Eco-Friendly and Fire-Safety polymeric materials(MoE) State Key Laboratory of Polymer Materials EngineeringNational Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan)College of ChemistrySichuan UniversityChengdu 610064SichuanChina

Lithium-sulfur(Li-S) batteries as extremely promising high-density energy storage devices have attracted extensive concern. However, practical applications of Li-S batteries are severely restricted by not only intrinsic polysulfides shuttle resulting from their concentration gradient diffusion and sluggish conversion kinetics but also serious safety issue caused by thermolabile and combustible polymer ***, it is presented for the first time that a robust and multifunctional separator with urchin-like Co-doped Fe OOH microspheres and multiwalled carbon nanotubes(MWCNTs) as an interlayer simultaneously achieves to suppress polysulfides shuttle as well as improves thermotolerance and nonflammability of commercial PP separator. Accordingly, Li-S batteries with modified separator exhibit remarkable performance in a wide range temperatures of-25–100 ℃. Typically, under 25 ℃, ultrahigh initial capacities of 1441 and 827.29 m A h g-1 at 1 C and 2 C are delivered, and remained capacities of 936 and 663.18 mA h g-1 can be obtained after 500 cycles, respectively. At 0.1 C, the S utilization can reach up to 97%. Significantly, at 1 C, the batteries also deliver an excellent performance with remained capacities of high to862.3, 608.4 and 420.6 m A h g-1 after 100, 300 and 450 cycles under 75, 0 and-25 ℃, respectively. This work provides a new insight for developing stable and safe high-performance Li-S batteries.

关键词： Lithium-sulfur batteries High-low temperature performances Hierarchically urchin-like microspheres Multifunctional interlayer Capturing and converting polysulfides

PREPARATION OF COMPOSITE MAGNETIC MICROSPHERES BY REACTIVE BLENDING

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Chinese Journal of Polymer Science 2011年第5期29卷 580-585页

作者：吴国章 Shanghai Key laboratory of Advanced polymeric materials School of Materials Science & Engineering East China University of Science & Technology

A novel method for preparation of polymer-based magnetic microspheres was proposed by utilizing melt reactive blending, which was based on selective location of Fe3O4 nanoparticles in PA6 domains of polystyrene （PS）/polyamide 6 （PA6） immiscible blends. The morphology of PA6/Fe3O4 composite magnetic mierospheres was studied by scanning electronic microscopy （SEM）. The composite magnetic mierospheres were spherical with a diameter range of 0.5-8 μm; the diameter was sharply decreased with a very narrow distribution by adding terminal maleic anhydride fimctionalized polystyrenes （FPS） for reactive blending. Transmission electron microscopy （TEM） and thermogravimetry analysis （TGA） results showed that most of Fe3O4 was located in the PA6 microspheres. Magnetization data revealed the magnetite content of PA6/Fe3O4 microspheres was about 32 wt% and the saturation magnetization could be up to 17.2 AmE/kg.

关键词： Composite magnetic microspheres Fe3O4 Reactive blending Selective location.

Mainchain conformation ordering self-assembly tailored room temperature phosphorescence emission

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Science China Chemistry 2025年第1期 329-336页

作者： Yuzhu Li Yumeng Gao Feng Tian Yu Wang Yuan Yao Shaoliang Lin Xiang Ma Binbin Xu Shanghai Key laboratory of Advanced polymeric materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Key laboratory for Advance materials and Feringa Noble Prize Scientist Joint Research Centre Frontiers Science for Materiobiology and Dynamic Chemistry School of Chemistry and Molecular Engineering East China University of Science & Technology

Developing organic room-temperature phosphorescence （RTP） materials with a wide range of tunable-emission is significant in expanding the applications of RTP ***,we rationally designed amphiphilic alternating copolymers poly(1,2-bis（4-alkoxyphenyl）ethane-1,2-dione-alt-（ethylene glycol）x)(P（Bz-alt-EGx）) that combined the advantage of alternating benzil and EGxskeleton,and tunable mainchain *** a mainchain conformation ordering assembly （COA） process,P（Bz-alt-EGx） self-assembled into well-defined platelets,and such assemblies emitted blue RTP at ca.425 nm due to the ordered folded-chain conformation and confined *** contrast,traditional self-assembly （TA） of P（Bz-alt-EGx） obtained less ordered aggregates,such as asymmetric worms,vesicles,and rod-like *** resultant less ordered aggregates exhibited yellow-green RTP at ca.550 *** wide-tuning RTP emission in solution （between blue and yellow-green,over125 nm） is realized using the P（Bz-alt-EGx） alternating copolymers under the treatment of different self-assembly *** study uncovers a new strategy to tailor the RTP emission through different self-assembly pathways and holds great promise for the fabrication of advanced optical materials.

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