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Frontiers of Chemical Science and Engineering 2022年第9期16卷 1387-1398页

作者： Yuyao Han Lei Xia Xupin Zhuang Yuxia Liang State Key Laboratory of Separation Membranes and Membrane Processes National Center for International Joint Research on Separation MembranesTiangong UniversityTianjin 300387China School of Textile Science and Engineering Tiangong UniversityTianjin 300387China School of Mathematical Sciences Tianjin Normal UniversityTianjin 300387China

UiO-66-NH2 is an efficient material for removing pollutants from wastewater due to its high specific surface area,high porosity and water ***,recycling them from wastewater is *** this study,the cellulose nanofibers mat deacetylated from cellulose acetate nanofibers were used to combine with UiO-66-NH_(2)by the method of in-situ growth to remove the toxic dye,rose *** to previous work,the prepared composite could not only provide ease of separation of UiO-66-NH_(2)from the water after adsorption but also demonstrate better adsorption capacity(683 mg∙g‒1(T=25°C,pH=3))than that of the simple UiO-66-NH_(2)(309.6 mg∙g^(‒1)(T=25℃,pH=3)).Through the analysis of adsorption kinetics and isotherms,the adsorption for rose bengal is mainly suitable for the pseudo-second-order kinetic model and Freundlich ***,the relevant research revealed that the main adsorption mechanism of the composite was electrostatic interaction,hydrogen bonding andπ–π***,the approach depicts an efficient model for integrating metal-organic frameworks on cellulose nanofibers to improve metal-organic framework recovery performance with potentially broad applications.

关键词： UiO-66-NH_(2) cellulose nanofibers rose bengal adsorption mechanism

Water molecule-induced hydrogen bonding between cellulose nanofibers toward highly strong and tough materials from wood aerogel

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Chinese Chemical Letters 2021年第10期32卷 3105-3108页

作者： Xiaoshuai Han Zhenxing Wang Linhu Ding Lian Chen Feng Wang Junwen Pu Shaohua Jiang Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037China MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy Beijing Forestry UniversityBeijing 100083China

Lightweight,highly strong and bio-based structural materials remain a long-lasting ***,inspired by nacre,a lightweight and high mechanical performance cellulosic material was fabricated via a facile and effective top-down approach and the resulting material has a high tensile strength of149.21 MPa and toughness of 1.91 MJ/m^(3).More specifically,the natural balsawood(NW) was subjected to a simple chemical treatment,removing most lignin and partial hemicellulose,follow by freeze-drying,forming wood aerogel(WA).The delignification process produced many pores and exposed numerous aligned cellulose ***,the WA absorbed a quantity of moisture and was directly densified to form above high-performance cellulosic *** treatment imitates highly ordered"brick-and-mortar" arrangement of nacre,in which water molecules plays the role of mortar and cellulose nanofibrils make the brick *** lightweight and good mechanical properties make this material promising for new energy car,aerospace,*** paper also explains the strengthening mechanism for making biomimetic materials by water molecules-induced hydrogen bonding and will open a new path for designing high-performance bio-based structural materials.

关键词： Wood aerogel cellulose nanofibers Water molecules Hydrogen bonding Strength and toughness

Acid-catalyzed crosslinking of cellulose nanofibers with glutaraldehyde to improve the water resistance of nanopaper

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Journal of Bioresources and Bioproducts 2018年第2期3卷 59-64页

作者： Aimin Tang Changyuan Yan Siyu Chen Degui Li State Key Laboratory of Pulp and Paper Engineering South China University of TechnologyGuangzhou 510640China.

In this study,cellulose nanofibers(CNFs)were crossed-linked with glutaraldehyde(GA)under acid condition for tailoring the mechanical properties and water-resistance of nanopaper or *** impact of carboxyl content of CNFs,GA concentration,temperature,pH,and reaction time on the crosslinking was investigated,and the process conditions for the crosslinking were ***-IR analyses showed that CNFs/GA cross-linked nanopaper was successfully fabricated by acetalization between the-OH groups of CNFs and the-CHO groups of GA,resulting in the formation of a dense,three-dimensional *** elastic modulus of CNFs/GA cross-linked film was 7.66GPa,62.98%higher than that of CNFs *** water-resistance of the cross-linked CNFs/GA films was *** crossed-linked CNFs/GA films was still intact after 24 h after being immersed in water,while the CNFs films almost dissolved completely after 20 min of soaking in *** method provides a facile route to enhance the elastic modulus and water-resistance of CNFs for potential applications including bullet-proof glass interlayer,flexible electronic device,and new packing materials.

关键词： cellulose nanofibers Glutaraldehyde Crosslinking Elastic modulus Water-resistance

Emulsion Graft Polymerization of Methyl Methacrylate onto cellulose nanofibers

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Green and Sustainable Chemistry 2021年第1期11卷 9-22页

作者： Hiromu Okada Chao Zhao Yusuke Mizuta Katsumi Yoshino Ryuichi Sugimoto School of Environmental Science and Engineering Kochi University of Technology Kochi Japan Shimane Institute for Industrial Technology Matsue Japan

Methyl methacrylate (MMA) was successfully grafted onto cellulose nanofibers (CNFs) at room temperature in an emulsion system using a diethyl(1,10-phenanthroline N1,N10)zinc(II) complex (Phen-DEZ) with oxygen as the radical initiator. The effects of reaction temperature, initiator concentration, and monomer content on the grafting reaction were investigated. The molecular weight of the non-grafted PMMA, which was produced during graft polymerization, was more than 1 million, as determined by size exclusion chromatography. The PMMA-grafted CNFs were analyzed by Fourier transform infrared spectroscopy, thermogravimetric analysis, and scanning electron microscopy, which confirmed the grafting of PMMA on the nanofiber surface. The study presents a strategy for the grafting of high-molecular weight PMMA onto CNFs in an emulsion system using Phen-DEZ and O2.

关键词： cellulose nanofibers Graft Polymerization Methyl Methacrylate Emulsion Diethylzinc

Programmable and reconfigurable humidity-driven actuators made with MXene(Ti_(3)C_(2)T_(x))-cellulose nanofiber composites for biomimetic applications

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Nano Research 2024年第7期17卷 6619-6629页

作者： Shaofeng Zeng Yuanji Ye Peidi Zhou Shimin Yi Qiaohang Guo Huamin Chen Guozhen Shen Mingcen Weng School of Mechanical and Automotive Engineering Fujian University of TechnologyFuzhou 350118China School of Materials Science and Engineering Fujian Provincial Key Laboratory of Advanced Materials Processing and ApplicationKey Laboratory of Polymer Materials and Products of Universities in FujianFujian University of TechnologyFuzhou 350118China Institute of Smart Marine and Engineering Fujian University of TechnologyFuzhou 350118China Fujian Key Laboratory of Functional Marine Sensing Materials College of Materials and Chemical EngineeringMinjiang UniversityFuzhou 350108China School of Integrated Circuits and Electronics Beijing Institute of TechnologyBeijing 100081China

Smart actuators have a wide range of applications in bionics and energy *** ability to reconfigure shape is essential for soft actuators to achieve various shapes and deformations,which is a crucial feature for next-generation ***,it is still an enormous challenge to establish a straightforward approach to creating programmable and reconfigurable ***-cellulose nanofiber composite film(MCCF)with a brick-and-mortar hierarchical structure was produced through a vacuum filtration *** demonstrates impressive mechanical properties such as a tensile stress of 68 MPa and a Young’s modulus of 4.65 ***,the MCCF highlights its potential for water-assisted shaping/welding due to the abundance of hydrogen bonds between MXene and cellulose *** also showcases capabilities as a humiditydriven actuator with a rapid response rate of 550°·s^(−1).Using the methods of water-assisted shaping/welding,several bionic actuators(such as flower,butterfly,and muscle)based on MCCF were designed,highlighting their versatility in applications of smart *** research showcases the impressive capabilities of MXene-based actuators and offers beneficial insights for the advancement of future intelligent materials.

关键词： MXene cellulose nanofibers programmable actuators humidity-driven

Multi-redox phenazine/non-oxidized graphene/cellulose nanohybrids as ultrathick cathodes for high-energy organic batteries

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Nano Research 2021年第5期14卷 1382-1389页

作者： Youngjin Ham Vitalii Ri Jin Kim Yeoheung Yoon Jinho Lee Kisuk Kang Ki-Seok An Chunjoong Kim Seokwoo Jeon Department of Materials Science and Engineering Advanced Battery CenterKorea Advanced Institute of Science and Technology(KAIST)Daejeon34141Republic of Korea Department of Materials Science and Engineering Chungnam National UniversityDaejeon34134Republic of Korea Thin Film Materials Research Center Korea Research Institute of Chemical Technology(KRICT)Daejeon34114Republic of Korea Department of Materials Science and Engineering Seoul National UniversitySeoul08826Republic of Korea

Various redox-active organic molecules can serve as ideal electrode materials to realize sustainable energy storage systems. Yet, to be more appropriate for practical use, considerable architectural engineering of an ultrathick, high-loaded organic electrode with reliable electrochemical performance is of crucial importance. Here, by utilizing the synergetic effect of the non-covalent functionalization of highly conductive non-oxidized graphene flakes (NOGFs) and introduction of mechanically robust cellulose nanofiber (CNF)-intermingled structure, a very thick (≈ 1 mm), freestanding organic nanohybrid electrode which ensures the superiority in cycle stability and areal capacity is reported. The well-developed ion/electron pathways throughout the entire thickness and the enhanced kinetics of electrochemical reactions in the ultrathick 5,10-dihydro-5,10-dimethylphenazine/NOGF/CNF (DMPZ-NC) cathodes lead to the high areal energy of 9.4 mWh·cm−2 (= 864 Wh·kg−1 at 158 W·kg−1). This novel ultrathick electrode architecture provides a general platform for the development of the high-performance organic battery electrodes.

关键词： energy storage organic electrodes batteries graphene cellulose nanofibers

Hydrophobic nanocellulose aerogels with high loading of metal-organic framework particles as floating and reusable oil absorbents

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Frontiers of Chemical Science and Engineering 2021年第5期15卷 1158-1168页

作者： Jiajia Li Shengcheng Zhai Weibing Wu Zhaoyang Xu Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forestry Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing210037China College of Light Industry and Food Engineering Nanjing Forestry UniversityNanjing210037China

In this paper,we employed a facile approach to prepare flexible and porous metal-organic frameworks(MOFs)containing cellulose nanofiber(CNF)aerogels(MNCAs)through freeze-drying MOF-containing cellulose nanofiber *** coating with methyltrimethoxysilane(MTMS)by chemical vapor deposition,recycled and hydrophobic MTMS-coated MNCAs(MMNCAs)were *** to the low density(0.009 g/cm^(3)),high porosity(97%)and good mechanical properties of the aerogel,the adsorption capacity of MMNCAs reached up to 210 g/g,which was nearly 3–5 times that of pure CNF *** prepared aerogels showed excellent oil/water selectivity and high capacity to adsorb oil and organic *** kind of cellulose-based aerogel may be applicable in the field of environmental protection.

关键词： cellulose nanofibers aerogels metal-organic framework oil-adsorption

Hybrid assembly of conducting nanofiber network for ultra-stretchable and highly sensitive conductive hydrogels

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Journal of Materials Science & Technology 2024年第2期169卷 1-10页

作者： Yalei Wang Shulong Zeng Shaohong Shi Yuheng Jiang Zhiwei Du Bingzhen Wang Xiurong Li State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures School of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan UniversitySichuan UniversityChengdu 610065China

Conductive hydrogels have attracted extensive attention owing to their promising application prospects in flexible and wearable ***,achieving both high sensitivity and mechanical robustness remains ***,a novel and versatile conductive hydrogel based on the hybrid assem-bly of conductive cellulose nanofiber(CNF)networks has been designed and *** by the templating effect of CNFs and stabilizing effect of negatively charged poly(styrene sulfonate)(PSS),conducting polymer poly(3,4-ethylenedioxythiophene)(PEDOT)was self-organized into three-dimensional nanostructures which constructed a robust conductive network after in-situ oxidative *** unique structure derived from CNF bio-template endowed polyacrylamide(PAM)hydrogels with improved electrical conductivity and excellent mechanical *** a result,the as-fabricated CNF/PEDOT:PSS/PAM hydrogel exhibited an ultimate tensile strain of 1881%and toughness of 3.72 MJ/m^(3),which were 4.07 and 8.27 times higher than the CNF-free hydrogel,*** significantly,the resultant hydrogel sensor showed highly desirable sensing properties,including remarkable sensing range(1100%),high gauge factor(GF=5.16),fast response time(185 ms),and commendable durability,as well as good ***,the hydrogel sensor was able to distinguish subtle physiological activities including phonation and facial expression,and monitor large human body motions such as finger flexion and elbow ***,it was feasible to integrate the strain sensor on the joints of robots to recognize complicated machine motion signals,showing potential in advanced human-machine interactions.

关键词： Strain sensor cellulose nanofibers PEDOT:PSS Conductive hydrogel Templating method

ZIF-67@cellulose nanofiber hybrid membrane with controlled porosity for use as Li-ion battery separator

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Journal of Energy Chemistry 2021年第1期30卷 170-180,I0006页

作者： Xiuxuan Sun Wangwang Xu Xiuqiang Zhang Tingzhou Lei Sun-Young Lee Qinglin Wu School of Renewable Natural Resources Louisiana State University AgCenterBaton RougeLA 70803United States Key Biomass Energy Laboratory of Henan Province Zhengzhou 450008HenanChina Forest Products Department National Institute of Forest Science57 HoegiroDongdaemun-guSeoul 02455Republic of Korea

Zeolitic imidazolate framework-67(ZIF-67) was synthesized on the surface of cellulose nanofibers(CNFs)in methonal to address the problems of unhomogeneous pore size and pore distribution of pure CNF membrane.A combination of Energy Dispersive X-Ray Spectroscopy(EDS),X-ray photoelectron spectroscopy(XPS) and X-ray powder diffraction(XRD) patterns were used to determine the successful synthesis of ZIF-67@*** size of the ZIF-67 particles and pore size of the ZIF-67@CNF membrane were50-200 nm and 150-350 nm, *** prepared ZIF-67@CNF membrane exhibited excellent thermal stability,lower thermal shrinkage and high surface *** discharge capacity retention of the Li-ion batteries(LIBs) made with ZIF-67@CNF,glass fiber(GF),CNF and commercial polymer membranes after 100 th cycle at 0.5 C rate were 88.41%,86.22%,83.27%,and 81.03%,*** with ZIF-67@CNF membrane exhibited a better rate capability than these with other *** damage of porous structure or peel-off of ZIF-67 was observed in the SEM images of ZIF-67@CNF membrane after100 th *** improved cycling performance,rate capability,and good electrochemical stability implied that ZIF-67@CNFs membrane can be considered as a good alternative LIB separator.

关键词： cellulose nanofibers ZIF-67 Li-ion battery Membrane property Battery performance

cellulose Nanofibrous Membranes Modified with Phenyl Glycidyl Ether for Efficient Adsorption of Bovine Serum Albumin

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Advanced Fiber Materials 2019年第3期1卷 188-196页

作者： Lihuan Wang Qiuxia Fu Jianyong Yu Lifang Liu Bin Ding State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of TextilesDonghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 200051China

Hydrophobic interaction chromatography(HIC)as an indispensable method for protein purification has attracted considerable attentions of researchers as well as biopharmaceutical ***,the low binding capacity and slow adsorption rate of the currently available HIC media lead to a little supply and high price of the highly purified ***,nanofibrous membranes with hydrophobic binding sites were developed for HIC by directly coupling phenyl glycidyl ether on the hydrolyzed cellulose acetate nanofiber membrane(cellulose-phenyl NFM).Scanning electron microscope(SEM),water contact angle(WCA),Fourier transform infrared(FTIR),thermogravimetric analysis(TGA),Brunauer-Emmett-Teller(BET)surface area analysis and capillary flow porometer(CFP)were applied to evaluate the physically and chemically structural *** obtained cellulose-phenyl NFMs showed a proper hydrophilcity(WCA=37°),a relatively high BET surface area(3.6 times the surface area of commercial fibrous membranes),and tortuous-channel structure with through-hole size in the range of 0.25-1.2μm,which led to a little non-specificity adsorption,high bovine serum albumin adsorption capacity of 118 mg g^(−1),fast adsorption process within 12 h,good long-term stability and ***,compared with traditional modification methods which always include activation and graft two steps,direct coupling method is more efficient for HIC media ***,cellulose-phenyl NFMs with outstanding protein adsorption performance could be a kind of promising candidate for HIC.

关键词： cellulose nanofibers Phenyl glycidyl ether Protein adsorption Hydrophobic interaction chromatography