Chenyang Xing

Shenzhen University

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Han Zhang

Shenzhen University

Zhengchun Peng

Shenzhen University

Yongjin Li

Hangzhou Normal University

Dianyuan Fan

Shenzhen University

Zhongjian Xie

Shenzhen Children's Hospital

Jingye Li

Shanghai Normal University

Meng Qiu

Ocean University of China

Zhongjun Li

Xinqiao Hospital

Liping Liu

Southern University of Science and Technology

Jinlai Zhao

Shenzhen University

Cooperative Institutions

Shenzhen University

115

Chinese Academy of Sciences

University of Chinese Academy of Sciences

Sun Yat-sen University

Shanghai Jiao Tong University

Huazhong University of Science and Technology

Shenzhen Second People's Hospital

Southern University of Science and Technology

Zhejiang University

University of Science and Technology of China

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Ionic gels with high mechanical strength enabled by supramolecular interactions between small molecular solvents and polymer chains

Journal of Physics Conference Series (2024)

Zhaoqiang He Chenyang Xing Zhengchun Peng

Abstract The limited mechanical properties of hydrogels significantly impede their practical applications. In this research, we have synthesized supramolecular ionic gels using betaine, citric acid, and acrylamide as the main components. These specimens exhibit exceptional tensile properties (exceeding 1000% elongation at break) and toughness (approximately 3 MJ/m 3 ), as well as recovery capabilities under substantial compressive strains. Furthermore, these transparent and conductive ionic gels have been employed in the fabrication of alternating current electroluminescent devices with single-electrode configurations. The outcomes of this study indicate that the high-strength ionic gel preparation method outlined herein shows great potential for expanding the application spectrum of ionic gels.

Mechanical strength

Supramolecular Polymers

10.1088/1742-6596/2842/1/012026

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Semicrystalline Polymer Binary-Phase Structure Templated Quasi-Block Graft Copolymers

The Journal of Physical Chemistry B (2017)

Jipeng Guan Yanyuan Wang Chenyang Xing Lijun Ye Yongjin Li

Herein, we report a simple strategy to synthesize quasi-block graft copolymers using the binary phase structure of semicrystalline polymers as the template. An unsaturated ionic liquid, 1-vinyl-3-butylimidazolium bis (trifluoromethylsulfonyl) imide ([VBIm] [TFSI]), is thermodynamically miscible with poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-co-HFP)) in solution. The solidification of P(VDF-co-HFP)/[VBIm] [TFSI] blend leads to the expelling of ILs from the crystalline region and the ILs are only located in the amorphous region. The electron-beam irradiation (EBI) at the solid state of the blends results in the locally grafting of the ILs onto the polymer blocks in the amorphous region, while the EBI does not affect the chemical structure of the crystalline region. Therefore, the quasi-block graft copolymers were achieved with IL-grafted blocks segregated by the unmodified blocks. The achieved block copolymers can be microphase separated into the various nanostructures, as the block copolymers with well-defined structure, upon varying the grafting ratios. The microphase separated quasi-block grafted copolymers exhibit excellent mechanical properties and good electrical properties. The elongation at break is 480% and the stress at break is as high as 30 MPa for the sample with the lamellar-like structure having the grafting ratio of 45.4 wt%.

10.1021/acs.jpcb.7b05069

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A dual auxiliary beam galloping triboelectric nanogenerator for low speed wind energy harvesting

Applied Physics Letters (2022)

Yun Tian Xiangkai Meng Xiaobo Lin Lanbin Zhang Chenyang Xing

Aiming to improve the energy harvesting efficiency under low wind speed, we propose a dual auxiliary beam galloping triboelectric nanogenerator (GTENG) in this work. The structural design of a single main beam and a pair of auxiliary beams enables the device to work under a higher vibration frequency when triggered by wind. A stable and improved working frequency of about 4.6 Hz was observed at various wind speeds. The device started to vibrate at a wind speed of 1.7 m/s and generated an output voltage of about 100 V. The outputs of this GTENG approach to saturation at a wind speed of around 5 m/s. The output voltage and short-circuit current reached 260 V and 20 μA, respectively. A maximum power of about 1 mW was obtained under a wind speed of 5.7 m/s with a load of 33 MΩ. Moreover, the effectivity and long-term stability of the device were demonstrated under low wind speeds. A digital watch is powered for 45 s after charging a 47 μF capacitor for 120 s at a wind speed of 3.1 m/s.

Nanogenerator

10.1063/5.0107120

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Biosynthetic neoantigen displayed on bacteria derived vesicles elicit systemic antitumour immunity

Journal of Extracellular Vesicles (2022)

Fanqiang Meng Liyan Li Zhirang Zhang Zhongda Lin Jinxie Zhang

Abstract Neoantigens derived from mutant proteins in tumour cells could elicit potent personalized anti‐tumour immunity. Nevertheless, the layout of vaccine vehicle and synthesis of neoantigen are pivotal for stimulating robust response. The power of synthetic biology enables genetic programming bacteria to produce therapeutic agents under contol of the gene circuits. Herein, we genetically engineered bacteria to synthesize fusion neoantigens, and prepared bacteria derived vesicles (BDVs) presenting the neoantigens (BDVs‐Neo) as personalized therapeutic vaccine to drive systemic antitumour response. BDVs‐Neo and granulocyte‐macrophage colony‐stimulating factor (GM‐CSF) were inoculated subcutaneously within hydrogel (Gel), whereas sustaining release of BDVs‐Lipopolysaccharide (LPS) and GM‐CSF recruited the dendritic cells (DCs). Virtually, Gel‐BDVs‐Neo combined with the programmed cell death protein 1 (PD‐1) antibody intensively enhanced proliferation and activation of tumour‐infiltrated T cells, as well as memory T cell clone expansion. Consequently, BDVs‐Neo combining with checkpoint blockade therapy effectively prevented tumour relapse and metastasis.

clone (Java method)

10.1002/jev2.12289

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Citations (33)

Effect of Inflow Mode and Parameters on Temperature and Phase Transition of Wires During Isothermal Quenching in Molten Salt Bath

Metallurgical and Materials Transactions B (2023)

Chang Ming Li Lei Wang Chenyang Xing Yanwen Zhang Bo Wang

Isothermal process

Rod

10.1007/s11663-023-02959-2

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Citations (2)

Ionic liquid modified poly(vinylidene fluoride): crystalline structures, miscibility, and physical properties

Polymer Chemistry (2013)

Chenyang Xing Mengmeng Zhao Liping Zhao Jichun You Xiaojun Cao

A room temperature ionic liquid (IL), 1-butyl-3-methylimidazolium hexafluorophosphate [BMIM][PF6], has been used to modify poly(vinylidene fluoride) (PVDF). The crystalline structures, miscibility, and physical properties of PVDF/IL blends were investigated systematically. It was found that the incorporation of IL into the PVDF leads to drastically increased γ crystal forms of PVDF by the interaction between the >CF2 and cationic ions. Moreover, IL is fully miscible with PVDF with the interaction parameter (χ12) of −2.84 calculated by the revised Nishi–Wang equation due to the drastic equilibrium melting temperature depression. Dynamic mechanical analysis (DMA) and small angle X-ray scattering (SAXS) results indicate that the IL molecules are inserted into the gallery of PVDF lamellae. A small amount of IL induces the appearance of the crystal-amorphous interface relaxation of PVDF, originating from the enrichment of IL distribution near the crystal-amorphous interface. The obtained PVDF/IL blends exhibit excellent mechanical performance with significantly increased ductility and good optical transmittance. In addition, the incorporation of IL into PVDF enhances the electrical conductivity of PVDF films greatly. Therefore, novel PVDF films with high transparency, excellent antistatic properties, and a highly polar crystal form fraction were successfully achieved.

Miscibility

Hexafluorophosphate

Small-angle X-ray scattering

10.1039/c3py00466j

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Citations (200)

2D Nonlayered Selenium Nanosheets: Facile Synthesis, Photoluminescence, and Ultrafast Photonics

Advanced Optical Materials (2017)

Chenyang Xing Zhongjian Xie Zhiming Liang Weiyuan Liang Taojian Fan

Abstract Investigations into 2D nanomaterials are of considerable significance from both an academic and industrial point of view. The present work addresses, for the first time, the fabrication of 2D nonlayered ultrathin selenium through a facile liquid‐phase exfoliation method. The results reveal that the as‐prepared 2D Se nanosheets are 40–120 nm in lateral dimension and 3–6 nm in thickness. The nanosheets exhibit a trigonal crystalline phase similar to their bulk counterpart, indicating the conservation of the crystalline features during the exfoliation procedure. The successful preparation of 2D Se nanosheets from nonlayered bulk Se can be ascribed to two kinds of anisotropy: (1) that of crystalline bulk Se with chain‐like structures, where strong intrachain SeSe covalent bonds coexist with weak interchain van der Waals forces, and (2) that of probe sonication in the vertical direction. The results also show that the 2D Se nanosheets possess a size‐dependent band gap ( E g ), strong photoluminescence effect and robust, chemical stability under ambient conditions. Furthermore, a 2D Se‐nanosheet‐based optical modulation device is demonstrated that allows for excellent ultrashort pulse generation of an optical communication band. It is therefore anticipated that 2D Se nanosheets may find significant applications in both photoluminescence and ultrafast photonics.

Exfoliation joint

Nanosheet

Nanomaterials

10.1002/adom.201700884

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Citations (197)

Self-healing of the superhydrophobicity by ironing for the abrasion durable superhydrophobic cotton fabrics

Scientific Reports (2013)

Jingxia Wu Jingye Li Bo Deng Haiqing Jiang Ziqiang Wang

Self-healing of the superhydrophobic cotton fabric (SCF) obtained by the radiation-induced graft polymerization of lauryl methacrylate (LMA) and n-hexyl methacrylate (HMA), can be achieved by ironing. Through the steam ironing process, the superhydrophobicity of the SCFs will be regenerated even after the yarns are ruptured during the abrasion test under a load pressure of 44.8 kPa. SCFs made from LMA grafted cotton fabric can ultimately withstand at least 24,000 cycles of abrasion with periodic steam ironing. The FT-IR microscope results show that the migration of the polymethacrylates graft chains from the interior to the surface is responsible for the self-healing effect.

Abrasion (mechanical)

10.1038/srep02951

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Citations (63)

Leaf-like Self-assembled MXene/ZnOEP Hybrid Network for Highly-Sensitive Temperature Sensing in Electronic Skin

Shijie Wan Weiguan Zhang Chenyang Xing Zhengchun Peng

Electronic skin (e-skin) has developed rapidly with promising applications in smart robots. Flexible temperature sensor plays an important role in robotic tactile sensing. In this work, we propose a hybrid temperature-sensitive material composed of Ti ₃ C ₂ Tx (MXene) and zinc-octaethylphorphyrin (ZnOEP). Self-assembled ZnOEP fiber network can twist MXene sheets in a scaffold structure and form a leaf-like morphology on the substrate. Benefitting from the high temperature coefficient of MXene and low modulus of the ZnOEP network, the fabricated flexible temperature sensor achieves a high sensitivity of 2.34%°C ^-1 and low hysteresis of 3.58%. These results suggest that the proposed temperature sensor can be used in e-skin to help robots accurately measure the temperature of their environment or the object they interact with.

10.1109/nems51815.2021.9451394

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Local Grafting of Ionic Liquid in Poly(vinylidene fluoride) Amorphous Region and the Subsequent Microphase Separation Behavior in Melt

Macromolecular Rapid Communications (2016)

Chenyang Xing Jingye Li Chunming Yang Yongjin Li

Polymer-based nanostructures can be generally created by self-assembly of block copolymers that are commonly synthesized by living radical polymerization. In this study, a new strategy is proposed to fabricate block-like copolymers by using the template of binary phase structure of semicrystalline polymers. Poly(vinylidene fluoride) (PVDF) is thermodynamically miscible with an unsaturated ionic liquid (IL) (1-vinyl-3-ethylimidazolium tetrafluoroborate) in the melt and IL molecules are expelled out from the crystalline parts during the crystallization of PVDF. Therefore, the IL molecules are only located at the amorphous region of PVDF crystals. The electron beam irradiation of the IL incorporated PVDF leads to the local grafting of IL molecules onto the PVDF molecular chains in the amorphous region, so block-like grafting polymer chains of crystalline PVDF-b-(amorphous PVDF-g-IL)-b-crystalline PVDF can be achieved. The subsequent heating of the irradiated sample induces the microphase separation of PVDF-g-IL from the ungrafted PVDF chains.

10.1002/marc.201600228

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Citations (15)