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A General Synthesis Method for Patterning PEDOT toward Wearable Electronics and bioelectronics

Research 2025年第1期7卷 205-214页

作者： Wanke Cheng Zihao Zheng Xiaona Li Ying Zhu Suqing Zeng Dawei Zhao Haipeng Yu Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry UniversityHarbinChina Key Laboratory on Resources Chemicals and Materials of Ministry of Education Shenyang University of Chemical TechnologyShenyangChina

The conductive polymer poly-3,4-ethylenedioxythiophene(PEDOT),recognized for its superior electrical conductivity and biocompatibility,has become an attractive material for developing wearable technologies and ***,the complexities associated with PEDOT's patterning synthesis on diverse substrates persist despite recent technological *** this study,we introduce a novel deep eutectic solvent(DES)-induced vapor phase polymerization technique,facilitating nonrestrictive patterning polymerization of PEDOT across diverse *** controlling the quantity of DES adsorbed per unit area on the substrates,PEDOT can be effectively patternized on cellulose,wood,plastic,glass,and even *** resultant patterned PEDOT exhibits numerous benefits,such as an impressive electronic conductivity of 282 S·m-1,a high specific surface area of 5.29 m^(2)·g-1,and an extensive electrochemical stability range from-1.4 to 2.4 V in a phosphate-buffered *** underscore the practicality and diverse applications of this DES-induced approach,we present multiple examples emphasizing its integration into self-supporting flexible electrodes,neuroelectrode interfaces,and precision circuit repair methodologies.

关键词： deep eutectic wearable technologies electrical conductivity deep eutectic solvent bioelectronics vapor phase polymerization PEDOT wearable electronics

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Magnetic field induced synthesis of（Ni, Zn）Fe2O4 spinel nanorod for enhanced alkaline hydrogen evolution reaction

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Progress in Natural science:materials International 2023年第2期33卷 172-177页

作者： Mingkun Xia Yan zhang Jiangyue Xiao Peng Zhao Zhongjun Hou Fanglin Du Dawei Chen Shuo Dou College of Material Science and Engineering Qingdao University of Science and Technology Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education Northeast Forestry University

Recently, the introduction of external fields（light, thermal, magnetism, etc.） during electrocatalysis reactions gradually becomes a new strategy to modulate the catalytic activities. In this work, an external magnetic field was innovatively employed for the synthesis progress of（Ni, Zn）Fe2O4spinel oxide(M-（Ni, Zn）Fe2O4). Results indicated the magnetic field（≤250 m T） would affect the morphology of catalyst due to the existing Fe ions, inducing the M-（Ni, Zn）Fe2O4nanosphere particles to be uniform and coral-like nanorods. In addition, the electronic structure of the catalyst was regulated by the valence state of Fe, changing the bonding of metal to oxygen atoms in different spinel sites. The results manifested that the M-（Ni, Zn）Fe2O4requires a lower overpotential of only 67m V to deliver 10 m A cm-2for hydrogen evolution reaction（HER） in alkaline electrolyte. Moreover, M-（Ni, Zn）Fe2O4respectively as the anode and cathode electrode for the overall water splitting, the catalysis system requires a cell voltage of only 1.76 V to gain a current density of 50 m A cm-2, combining with an excellent discharging stability after 10 h. This work provides a facile synthesis strategy toward the design of efficient non-noble metal catalysts for alkaline HER and overall water splitting.

关键词： Hydrogen evolution reaction Magnetic field Water splitting Spinel oxide Electron modulation

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Encapsulation of polyethylene glycol in cellulose-based porous capsules for latent heat storage and light-to-thermal conversion

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Frontiers of Chemical science and Engineering 2023年第8期17卷 1038-1050页

作者： Jiangwei Li Lina Meng Jiaxuan Chen Xu Chen Yonggui Wang Zefang Xiao Haigang Wang Daxin Liang Yanjun Xie Key Laboratory of Bio-based Material Science and Technology(Ministry of Education) College of Material Science and EngineeringNortheast Forestry UniversityHarbin 150040China

Phase change materials are potential candidates for the application of latent heat ***,we fabricated porous capsules as shape-stable materials from cellulose-based polyelectrolyte complex,which were first prepared using cellulose 6-(N-pyridinium)hexanoyl ester as the cationic polyelectrolyte and carboxymethyl cellulose as the anionic polyelectrolyte to encapsulate polyethylene glycol by the vacuum impregnation ***,the multi-walled carbon nanotube or graphene oxide,which were separately composited into the polyelectrolytes complex capsules to enhance thermal conductivity and light-to-thermal conversion *** capsules owned a typical core–shell structure,with an extremely high polyethylene glycol loading up to 34.33 g∙g^(‒1).After loading of polyethylene glycol,the resulted cellulose-based composite phase change materials exhibited high thermal energy storage ability with the latent heat up to 142.2 J∙g^(‒1),which was 98.5%of pure polyethylene *** results showed that the composite phase change materials demonstrated good form-stable property and thermal ***,studies involving light-to-thermal conversion determined that composite phase change materials exhibited outstanding light-to-thermal conversion *** their exceptional comprehensive features,innovative composite phase change materials generated from cellulose presented a highly interesting choice for thermal management and renewable thermal energy storage.

关键词： cellulose polyelectrolytes phase change materials thermal energy storage light-to-thermal conversion

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Fine Characterization and Analysis of Drying Strain of the ELM Board via DIC technology

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Journal of Renewable materials 2023年第2期11卷 567-580页

作者： Yuanchu Liu Xiaodong Zhu Zhengmin Jin Yingying Liu Qingjian Wei Bonan Liang Yingchun Cai Jingyao Zhao Key Laboratory of Bio-Based Material Science and Technology(Ministry of Education) College of Material Science and EngineeringNortheast Forestry UniversityHarbin150040China

In this paper,the occurrence and development mechanism of strain on the cross-section during the wood drying is ***,strain regularity on the cross-section of 50 mm thickness elm(Ulmus rubra)board at the temperature of 40℃and 80℃is detected via digital image correlation ***,the difference between tangential and radial strain at surface and core layers was *** results showed that strain distribution in the width direction of the board is ***,a large drying shrinkage strain occurs at the near-core layer,while the maximum strain difference reaches 4.08%.Hence,the surface of the board is cracked along the thickness *** radial strain of the board is higher than the tangential strain in the early stage of drying,while these strains are reversed in the later stage of *** temperature is related to the difference between the tangential and radial strains of the elm *** differences at the core layer are larger than those of the surface *** conducted research results provide a theoretical basis for process optimization.

关键词： Digital image correlation technology drying strain fine characterization moisture content distribution

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Development of a Novel Extrusion Process for Preparing Rice Straw/LLDPE Composites

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Journal of Renewable materials 2023年第3期11卷 1123-1135页

作者： Huicheng Xu Hao Xie Weidong Shan Weihong Wang Key Laboratory of Bio-Based Material Science and Technology(Ministry of Education) Material Science and Engineering CollegeNortheast Forestry UniversityHarbin150040China

Straw utilization is a key issue related to agricultural production and air pollution *** this study,a novel extrusion process was proposed to improve the physical and mechanical properties of the straw-reinforced linear low-density polyethylene(LLDPE)*** of crushing the straw and mixing it with plastic matrix,the new method mixes straw with plastic matrix in its original *** intact long rice straws were parallelly spread on the LLDPE film and then rolled up together into a prefabricated *** rolls experienced three extrusion processes as follows:(1)twin-screw melting,cooling and crushing,single-screw extruding;(2)twin-screw melting and single-screw extruding;(3)directly single-screw *** testing results showed that the straw/LLDPE composite(with a ratio of 6:4)prepared by Method(2)exhibited optimized *** by scanning electron microscopy indicated that the damage to rice straw fibers was relatively minor,the orientation of long fibers was good,and the binding of fibers with the LLDPE matrix was excellent in this *** results of dynamic mechanical testing(DMA),differential scanning calorimetry(DSC)and thermogravimetric(TG)analysis demonstrated that composites prepared by the new process exhibited significantly improved thermal stability and energy storage modulus,compared with those prepared by conventional processes(e.g.,extruded straw particles/LLDPE composite).The new proposed method yielded significantly enhanced mechanical properties while reducing dust pollution.

关键词： Long rice straw linear low density polyethylene film extrusion mechanical property

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One-Pot Protolignin Extraction by Targeted Unlocking Lignin-Carbohydrate Esters via Nucleophilic Addition-Elimination Strategy

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Research 2023年第4期2023卷 181-194页

作者： Yuhan Lou Xinyue Sun Yanyan Yu Suqing Zeng Yilin Li Yongzhuang Liu Haipeng Yu Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education Northeast Forestry UniversityHarbin 150040P.R.China

Protolignin extraction can facilitate structure elucidation and valorization of lignin in biorefinery,but is rather challenging due to the complex chemical bonds ***,we developed the in situ generated NH3-reline(IGNR)system to realize one-pot protolignin extraction from *** the IGNR system,reline consisting of choline chloride and urea acted as both a solvent and a nucleophile generator,and the nucleophilic addition-elimination mechanism was verified by model compound *** in situ generated NH3 could precisely cleave the lignin-carbohydrate esters in lignocellulose with a near-quantitative retention of *** extracted IGNR-Protolignin exhibited native lignin substructure with high molecular weight and highβ-O-4′content(41.5 per 100 aromatic units).In addition,the up-scaled kilogram reaction demonstrated the feasibility of the IGNR system for potential industrial application in a green and sustainable *** work represents a breakthrough toward protolignin extraction in practice with the future goal of achieving total biorefinery.

关键词： lignin system bonds

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Electrospun Polyacrylonitrile Membrane In Situ Modified with Cellulose Nanocrystal Anchoring TiO_(2)for Oily Wastewater Recovery

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Advanced Fiber materials 2023年第6期5卷 2055-2068页

作者： Jiqing Lu Tian Bai Dong Wang Haijiao Yu Qingxiang Wang Zhaoxuan Niu Yi Hu Xueying Liu Guangping Han Wanli Cheng Key Laboratory of Bio‑Based Material Science&Technology of Ministry of Education Northeast Forestry UniversityHarbin 150040China

With the increasingly urgent demand for clean water resources and the growing emission of oily wastewater,high-flux oil/water separation materials with the special wettability are progressively *** nanocrystal(CNC)from renewable biomass has been utilized to fabricate oil/water separation membranes,but it is limited to enhancing mechanical ***,a wrinkled structure with abundant–OH is constructed on polyacrylonitrile(PAN)nanofibers via the CNC hybridization *** then,a super-hydrophilic nano-TiO_(2)shell is anchored tightly on the surface of the fiber by wrinkles and–*** CNC promotes significantly the in situ growth of TiO_(2),with the TiO_(2)loading ratio of up to 5.3%.The nano-TiO_(2)shell endows the obtained film with super-hydrophilicity and underwater super-oleophobicity,resulting in a visible increase of the permeation flux for the oil/water mixture from 1483 to 11,023 L m^(−2)h^(−1).Interestingly,the hierarchical structure facilitates the demulsification for oil-in-water emulsion stabilized by surfactant,allowing the obtained membrane to exhibit eminent antifouling property and high emulsion permeability of about 3,278 L m^(−2)h^(−1).This design strategy develops next-generation anchors for targeted modification on the non-reactive substrates and provides a novel pathway for fabricating oil/water separation membranes.

关键词： Electrospinning Cellulose nanocrystal TiO_(2) Core-shell structure Oil/water separation

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Selective Emission Fabric for Indoor and Outdoor Passive Radiative Cooling in Personal Thermal Management

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Nano-Micro Letters 2025年第8期17卷 306-319页

作者： Haijiao Yu Jiqing Lu Jie Yan Tian Bai Zhaoxuan Niu Bin Ye Wanli Cheng Dong Wang Siqi Huan Guangping Han Key Laboratory of Bio-Based Material Science and Technology(Northeast Forestry University) Ministry of EducationHarbin 150040People’s Republic of China Department of Astronautical Science and Mechanics Harbin Institute of Technology(HIT)Harbin 150001People’s Republic of China

Radiative cooling fabric creates a thermally comfortable environment without energy input,providing a sustainable approach to personal thermal ***,most currently reported fabrics mainly focus on outdoor cooling,ignoring to achieve simultaneous cooling both indoors and outdoors,thereby weakening the overall cooling ***,a full-scale structure fabric with selective emission properties is constructed for simultaneous indoor and outdoor *** fabric achieves 94%reflectance performance in the sunlight band(0.3–2.5μm)and 6%in the mid-infrared band(2.5–25μm),effectively minimizing heat absorption and radiation release *** also demonstrates 81%radiative emission performance in the atmospheric window band(8–13μm)and 25%radiative transmission performance in the mid-infrared band(2.5–25μm),providing 60 and 26 W m−2 net cooling power outdoors and *** practical applications,the fabric achieves excellent indoor and outdoor human cooling,with temperatures 1.4–5.5℃ lower than typical polydimethylsiloxane *** work proposes a novel design for the advanced radiative cooling fabric,offering significant potential to realize sustainable personal thermal management.

关键词： Passive radiative cooling Electrospinning Full-scale structure Selective emission Personal thermal management

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Worm-like ordered mesoporous carbon from liquefied wood:Morphological manipulation by varying hydrothermal temperature

Aggregate

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Aggregate 2024年第4期5卷 416-425页

作者： Yang Li Zhenwei Wu Yanhong Liu Kun Zhang Sha Luo Wei Li Shouxin Liu Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education Northeast Forestry UniversityHarbinChina Engineering Research Center of Advanced Wooden Materials of the Ministry of Education Northeast Forestry UniversityHarbinChina

The hydrothermal/soft templating method is an effective way to synthesize ordered mesoporous carbon(OMC),yet the mechanism of this strategy is not well ***,a hydrothermal temperature-controlled approach is developed to precisely synthesize OMCs with well-defined morphologies from liquefied wood(LW).As the hydrothermal temperature increases from 130 to 210◦C,the hydrophilicity of the hydrophilic blocks decreases accompanied by the increase of the rel-ative volume of the hydrophobic block,resulting in the packing parameter p of micelles changing from p≤1/3 to 1/3

关键词： hydrothermal temperature-controlled liquefied wood ordered mesoporous carbon

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biocomposites of Polylactic Acid Reinforced by DL-Lactic Acid-Grafted Microfibrillated Cellulose

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Journal of Renewable materials 2022年第11期10卷 2961-2972页

作者： Chaodong Liu Yutong Yang Boyu Cui Weihong Wang Key Laboratory of Bio-Based Material Science and Technology(Ministry of Education) Material Science and Engineering CollegeNortheast Forestry UniversityHarbin150040China

Microfibrillated cellulose(MFC)is often added to polylactic acid(PLA)matrixes as a reinforcing filler to obtain fully-biodegradable composites with improved mechanical ***,the incompatibility between MFC and the PLA matrix limits the mechanical performance of MFC-reinforced PLA *** this paper,DL-lactic acid-grafted-MFC(MFC-g-DL)was used to improve the compatibility with *** composites were prepared by melt extrusion and hot-cold *** tensile strength of the PLA/MFC-g-DL composite increased by 22.1%compared with that of PLA after adding 1%*** electron microscopy(SEM),differential scanning calorimetry(DSC),and dynamic thermomechanical analysis(DMA)were used to explore the enhancement *** energy dissipation in the MFC network and the improved compatibility between PLA and MFC-g-DL played important roles in the *** SEM results showed that there was a closer combination between PLA and *** DSC results showed that the addition of cellulose changed the glass transition temperature,melting temperature,and crystallization temperature of *** TG results showed that the initial and maximum decomposition temperature were lower than those of *** ultraviolet spectra showed that the composite had good transparency at a low concentration of MFC-g-DL.

关键词： Polylactic acid microfibrillated cellulose tensile properties transparency

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