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Recent Progresses in Liquid-Free Soft Ionic Conductive Elastomers

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Chinese Journal of Chemistry 2023年第7期41卷 835-860页

作者： Chuan Luo Zhenkai huang zi-Hao Guo Kan Yue South China Advanced Institute for Soft Matter Science and Technology School of Emergent Soft MatterSouth China University of TechnologyGuangzhouGuangdong510640 China School of Materials Science and Hydrogen Energy Foshan UniversityFoshanGuangdong528000 China Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices South China University of TechnologyGuangzhouGuangdong510640 China

Comprehensive Summary With the rapid growth of soft electronic and ionotronic devices such as artificial tissues,soft luminescent devices,soft robotics,and human-machine interfaces,there is a demanding need to accelerate the development of soft ionic conductive *** date,the first-generation ionotronic devices are mainly based on hydrogels or ***,due to their intrinsic drawbacks,such as freezing or volatilization at extreme temperatures,and the leakage problem under external mechanical forces,the reliability of ionotronic devices under harsh conditions remains a great *** advent of liquid-free ionic conductive elastomers(ICEs)has the potentials to solve the issues related to the gel-type soft conductive *** free ions shuttling within the ion-dissolvable polymer network enable liquid-free ICEs to exhibit unparalleled ionic conductivity and ***,by tuning the composition and structure of the polymeric network,it is also feasible to integrate other desirable properties,such as self-healing ability,transparency,biocompatibility,and stimulus responsiveness,into liquid-free ICE *** this review,we summarize the design strategies of recently reported liquid-free ICEs,and further explore the methods to introduce multifunctionality,which originate from the rational molecular design and/or the synergy with other ***,we highlight the representative applications of liquid-free ICEs in soft *** is believed that liquid-free ICEs might provide a unique material platform for the next-generation ionotronics.

关键词： Liquid-free Elastomer lonic conductorSoft materials lonotronics

Interactive effects of irrigation and exponential fertilization on nutritional characteristics in Populus 3 euramericana cv. ‘74/76' cuttings in an open-air nursery in Beijing, China

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Journal of Forestry Research 2016年第3期27卷 569-582页

作者： zi Wang Luyi Ma Zhongkui Jia Hongxu Wei jie Duan College of Forestry Henan University of Science and Technology Luoyang 471003 Henan China National Energy R&D Center for Non-Food Biomass Beijing Forestry University Beijing 100083 China Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun 130102 China

Nutritional characteristics determine tree stock quality to a considerable extent. Exponential fertilization can induce nutrient reserves within juvenile trees, but its validity on poplar is contingent on interaction with a scientific irrigation regime due to limited water resources under global warming. In the present study, we raised 3200 Populus 9 euramericana cv. ＇74/76＇ cuttings under four irrigation regimes of 0（I0）, 60 %（I60）, 80 %（I80）, and100 %（I100） of field capacity for soil moisture content with or without（control） the employment of nitrogen（N） addition delivered as exponential fertilization at the rate of 8 g N cutting^（-1）（E8） in an open-air nursery in Beijing, China. Both height and diameter increased with the increment of soil moisture ratio or in response to exponential fertilization（EF） without any interactive effects. In general, concentrations of N, phosphorus（P）,and potassium（K） declined with time in stem but foliar N concentration did not change. Under the I100 regime, EF increased foliar N concentration relative to the control but failed to affect N concentration in stem in September, when both N concentration and N content were increased by EF under the I80 regime. Stem-K content and concentration by EF under the I80 regime also increased in September,therefore EF-treated cuttings had a higher ratio of K content in stem to that in whole plant（%ANAR）. Vector diagnosis for nutritional status indicated that EF resulted in dilution of K concentration but induced a steady-state P uptake in leaves under all irrigation regimes. Therefore, EF of N addition could promote N uptake to leaves of P. 9 euramericana cv. ＇74/76＇ cuttings, but it had a null effect on N and P reserves in stem and impaired K *** conclusion, the irrigation regime of 80 % field capacity of soil moisture content was suggested for the culture of juvenile P. 9 euramericana cv. ＇74/76＇ cuttings. As the interactive meaning, EF was also suggested for its excellent promotion on

关键词： Poplar - Nitrogen Phosphorus Potassium Nutrient loading Vector diagnosis

Bioinspired Adaptive Gel Materials with Synergistic Heterostructures

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Chinese Journal of Polymer Science 2018年第6期36卷 683-683,684-696页

作者： zi-Guang Zhao Yi-Chao Xu Ruo-Chen Fang Ming-jie Liu Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191China International Research Institute for Multidisciplinary Science Beihang UniversityBeijing 100191China Beijing Advancedlnnovation Center for Biomedical Engineering Beihang UniversityBeijing 100191China

In nature, many biological soft tissues with synergistic heterostructures, such as sea cucumbers, skeletal muscles and cartilages, exhibit high functionality to adapt to complex environments. In artificial soft materials, hydrogels are similar to biological soft tissues due to the unique integration of ＂soft and wet＂ properties and elastic characteristics. However, currently hydrogel materials lack their necessary adaptability, including narrow working temperature windows and uncontrollable mechanics, thus restrict their engineering application in complex environments. Inspired by abovementionedbiological soft tissues, researchers have increasingly developed heterostructural gel materials as functional soft materials with high adaptability to various mechanical and environmental conditions. This article summarizes our recent work on high-performance adaptive gel materials with synergistic heterostructures, including the critical design criteria and the state-of-the-art fabrication strategies of our gel materials. The functional adaptation properties of these heterostructural gel materials are also presented in details, including temperature, wettability, mechanical and shape adaption.

关键词： Bioinspired materials Adaptive gels Hydrogels Mechanical strength Shape memory

Mechanical performance of 22SiMn2TiB steel welded with lowtransformation- temperature filler wire and stainless steel filler wire

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Journal of Iron and Steel Research International 2024年第4期31卷 967-981页

作者： zi-dong Lin Kai-jie Song Zhen Sun zi-qian Zhu Xue-feng Zhao Constantinos Goulas Wei Ya Xing-hua Yu School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China Department of Design Production and Management Faculty of Engineering Technology.University of TwenteEnschede 7500 AETheNetherlands Rotterdam Additive Manufacture Fieldlab(RAMLAB) Rotterdam 3089 JWTheNetherlands

TX-80 low-transformation-temperature(LTT)welding wire was used to replace the traditional ER 307Si welding wire to realize the connection of 22SiMn2TiB armor steel in manual overlay *** previously existing issues,such as welding cracks,large welding deformation,and severe welding residual stress,were solved to ensure good strength and ductility *** particular,with the same welding conditions,TX-80 LTT wire eliminates welding *** reduces the welding deformation no matter the base pretreatment of pre-setting angle or no pre-setting *** comparison,it was found that the microstructure at the TX-80 weld is mainly composed of martensite and a small amount of retained *** contrast,the microstructure of the ER 307Si weld consists of a large amount of austenite and a small amount of skeleton-like *** variation trend of residual stress and microhardness from the weld to the base were investigated and compared with the mechanical properties of base *** TX-80 and the ER 307Si tensile samples elongation is 6.76%and 6.01%,while the ultimate tensile strengths are 877 and 667 MPa,*** average impact toughness at room temperature of the ER 307Si weld is 143.9 J/cm^(2),much higher than that of the TX-80 weld,which is only 36.7 J/cm^(2).The relationship between impact and tensile properties with microstructure species and distribution was *** addition,the fracture surface of the tensile and the impact samples was observed and *** dimples,fewer pores,larger radiation zone,and shear lips of TX-80 samples indicate better tensile ductility and worse impact toughness than those of ER 307Si weld.

关键词： Low-transformation-temperature material 22SiMn2TiB steel Welding deformation Residual stress Martensitic transformation Mechanical property

Techniques for increasing the yield of stem cell-derived exosomes:what factors may be involved?

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Science China(Life Sciences) 2022年第7期65卷 1325-1341页

作者： zi-Yuan Feng Qing-Yi Zhang jie Tan Hui-Qi Xie Laboratory of Stem Cell and Tissue Engineering Orthopedic Research InstituteMed-X Center for MaterialsState Key Laboratory of BiotherapyWest China HospitalSichuan UniversityChengdu 610041China

Exosomes are nano-scale extracellular vesicles secreted by cells and constitute an important part in the cell-cell *** main contents of the exosomes include proteins,micro RNAs,and *** mechanism and safety of stem cell-derived exosomes have rendered them a promising therapeutic strategy for regenerative ***,limited yield has restrained full explication of their functions and clinical *** address this,various attempts have been made to explore the up-and down-stream manipulations in a bid to increase the production of *** review has recapitulated factors which may influence the yield of stem cell-derived exosomes,including selection and culture of stem cells,isolation and preservation of the exosomes,and development of artificial exosomes.

关键词： exosome stem cell yield therapy

Spatial resolution and image processing for pinhole camera-based X-ray fluorescence imaging: a simulation study

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Nuclear Science and Techniques 2022年第5期33卷 135-153页

作者： Ze He Ning huang Peng Wang zi-Han Chen Bo Peng Key Laboratory of Radiation Physics and Technology of the Ministry of Education Institute of Nuclear Science and TechnologySichuan UniversityChengdu 610064China

Spatial resolution and image-processing methods for full-field X-ray fluorescence(FF-XRF)imaging using X-ray pinhole cameras were studied using Geant4simulations with different geometries and algorithms for image *** main objectives were:(1)calculating the quantum efficiency curves of specific cameras,(2)studying the relationships between the spatial resolution and the pinhole diameter,magnification,and camera binning value,and(3)comparing image-processing methods for pinhole camera *** results were obtained using a point and plane source as the X-ray fluorescence emitter and an array of 100×100 silicon pixel detectors as the X-ray *** quantum efficiency of a back-illuminated deep depletion(BI-DD)structure was above 30%for the XRF energies in the 0.8–9 keV range,with the maximum of 93.7%at 4 *** best spatial resolution of the pinhole camera was 24.7μm and 31.3 lp/mm when measured using the profile function of the point source,with the diameter of 20μm,magnification of 3.16,and camera bin of 1.A blind deconvolution algorithm with Gaussian filtering performed better than the Wiener filter and Richardson iterative methods on FF-XRF images,with the signal-to-noise ratio of 7.81 dB and improved signalto-noise ratio of 7.24 dB at the diameter of 120μm,magnification of 1.0,and camera bin of 1.

关键词： Full-field X-ray fluorescence(FF-XRF) X-ray pinhole camera Spatial resolution Image processing

WRKY11 up-regulated dirigent expression to enhance lignin/lignans accumulation in Lilium regale Wilson during response to Fusarium wilt

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Journal of Integrative Agriculture 2024年第8期23卷 2703-2722页

作者： jie Deng zi’e Wang Wenyun Li Xiaohua Chen Diqiu Liu Faculty of Life Science and Technology Kunming University of Science and TechnologyKunming 650500China

Lilium are highly economically valuable ornamental plants that are susceptible to Fusarium wilt caused by Fusarium *** regale Wilson,a wild lily native to China,is highly resistant to *** this study,a WRKY transcription factor,WRKY11,was isolated from ***,and its function during the interaction between *** and *** was *** ectopic expression of LrWRKY11 in tobacco increased the resistance to F oxysporum,moreover,the transcriptome sequencing and UHPLC-MS/MS analysis indicated that the methyl salicylate and methyl jasmonate levels rose in LrWRKY11 transgenic tobacco,meanwhile,the expression of lignin/lignans biosynthesis-related genes including a dirigent(DiR)was *** lignin/lignans contents in LrWRKY11-transgenic tobacco also significantly increased compared with the wild-type *** addition,the resistance of *** scales in which LrWRKY11 expression was silenced by RNAi evidently decreased,and additionally,the expression of lignin/lignans biosynthesis-related genes including LrDIR1 was significantly ***,LrDIR1 and its promoter(PLrDIR1)sequence containing the W-box element were isolated from *** interaction assay indicated that LrWRKY11 specifically bound to the W-box element in PLrDIR1 and activated LrDIR1 ***,β-glucuronidase activity in the transgenic tobacco co-expressing LrWRKY11/PLrDIR1-β-glucuronidase was higher than that in transgenic tobacco expressing PLrDIR1-β-glucuronidase ***,the ectopic expression of LrDIR1 in tobacco enhanced the resistance to *** and increased the lignin/lignans *** brief,this study revealed that LrWRKY11 positively regulated *** resistance to *** through interaction with salicylic acid/jasmonic acid signaling pathways and modulating LrDIR1 expression to accumulate lignin/lignans.

关键词： Lilium regale Fusarium oxysporum WRKY transcription factor dirigent

Redox-etching induced porous carbon cloth with pseudocapacitive oxygenic groups for flexible symmetric supercapacitor

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Journal of Energy Chemistry 2022年第1期31卷 136-143,I0005页

作者： Xu Han zi-Hang huang Fanjin Meng Baohua Jia Tianyi Ma Institute of Clean Energy Chemistry Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials of Liaoning ProvinceCollege of ChemistryLiaoning UniversityShenyang 110036LiaoningChina Centre for Translational Atomaterials School of ScienceSwinburne University of TechnologyHawthornVIC 3122Australia

Constructing high-performance electrodes with both wide potential window(e.g.≥2 V in aqueous electrolyte)and excellent mechanical flexibility represents a great challenge for *** of the outstanding conductivity and flexibility,carb on cloth(CC)has show n unlimited prospects for constructing flexible electrodes,but is rarely used directly as electrode material due to its electrochemical inertness and small specific surface *** tackle these two critical limitations,we design a novel redox-etching strategy to synthesize CC-based electrode with 3D interconnecting pore *** sponge-like highly porous CC was further activated by strong oxidant to form abundant oxygenic groups,which occupy the interior and surface of current collector to render substantial *** as-synthesized CC electrode yielded an impressive capacitance of 4035 mF cm^(-2) at 3 mA cm^(-2) and satisfying cycling durability in a wide potential range of-1-1 V ***,which surpass the majority of reported CC-based electrodes.A symmetric supercapacitor with stable voltage of 2 V is assembled and delivers remarkable energy density of 6.57 mWh cm^(-3).Significantly,the device demonstrates an unparalleled flexibility with no capacitive decay after 100 bending *** facile chemical etching and post-treatment processes are designed for large-scale manufacturing of the CC electrodes by providing high surface area and abundant electrochemically active sites,promising for industry *** innovative synthetic strategy ope ns up new opportunities for high-performance flexible en ergy storage.

关键词： Porous carbon fiber Hierarchical pores Oxygenic groups Wide potential window High-performance supercapacitors

Five new nervogenic acid derivatives from Liparis nervosa

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Chinese Chemical Letters 2013年第8期24卷 734-736页

作者： Shuai huang Ming-Feng Pan Xian-Li Zhou zi-Li Zhou Cui-Juan Wang Lian-Hai Shan jie Weng School of Life Science and Engineering Southwest Jiaotong University Key Laboratory of Advanced Technology of Materials Ministry of EducationSouthwest Jiaotong University

Five new nervogenic acid derivatives（1-5） have been isolated from Liparis nervosa（*** ***） *** structures were elucidated on the basis of extensive spectroscopic analysis,including 1D NMR,2D NMR,and HR-ESI-MS.

关键词： Orchidaceae Liparis nervosa Benzamide derivatives Nervogenic acid derivatives