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Multi-layer hierarchical cellulose nanofibers/carbon nanotubes/vinasse activated carbon composite materials for supercapacitors and electromagnetic interference shielding

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Nano Research 2024年第3期17卷 904-912页

作者： Tianxu Wang Chuanyin Xiong Yongkang Zhang Bo Wang Qing Xiong Mengjie Zhao Yonghao Ni College of Bioresources Chemical&Materials Engineering Shaanxi University of Science and TechnologyXi’an 710021China Department of Chemical and biomedical Engineering The University of MaineOronoME 04469USA University of New Brunswick Limerick Pulp&Paper CtrFrederictonNB E3B 5A3Canada

Developing porous self-supporting electrodes with excellent conductivity,good mechanical properties,and high electrochemical activity is crucial for constructing electrode materials with lightweight,ultra-thin,flexible,and high capacitance performance.In this work,we prepared a cellulose nanofibers(CNFs)/carbon nanotubes(CNTs)/vinasse activated carbon(VAC)(CCV)composite material with a multi-layer hierarchical conductive structure through simple vacuum filtration and freeze-drying.In this composite material,the self-assembly of CNF provides the main skeleton structure of a multi-layer hierarchical structure.CNT provides a fast path for the rapid transfer of electrons and is beneficial for the loss of electromagnetic waves.VAC provides sufficient double layer performance.The synergistic effect of the above three endows CCV composite materials with excellent energy storage performance and electromagnetic interference(EMI)shielding performance.In addition,we endowed the CCV composite with a certain shape and performance by introducing a vitrimer polymer with a dynamic cross-linked network structure.In summary,thanks to the synergistic effect of various components in the multi-layer hierarchical structure,CCV composite materials exhibit excellent integration performance,especially stable energy storage performance and EMI shielding performance.These significant properties make CCV composite materials have great application prospects in the fields of energy storage and intelligent EMI shielding.

关键词： self-supporting electrodes multi-layer hierarchical structure supercapacitors electromagnetic interference shielding

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Starting materials, processes and characteristics of bio-based foams: A review

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Journal of Bioresources and Bioproducts 2024年第2期9卷 160-173页

作者： Xiaohan Wang Jinwon Jang Yanqun Su Jingang Liu Hongjie Zhang Zhibin He Yonghao Ni National Engineering Laboratory for pulp and paper China National Pulp and Paper Research Institute Co.Ltd.Beijing 100102China limerick pulp and paper Centre and Department of Chemical Engineering University of New BrunswickNew Brunswick E3B 5A3Canada

Biofoam products have attracted considerable attention lately because there is a growing demand for green/sustainable products.To this end,various biobased foams have either been developed or are currently in development,e.g.,bio-based polyurethanes(PUs),polylactic acid(PLA),starch,and polyhydroxyalkanotates(PHAs).Indeed,significant progress has been made;however,chal-lenges still persist,for example,biobased foam products have poor processability,inferior com-patibility,thermal and strength properties.In this review,we focus on five biofoam products:namely bio-based PUs,PLA,starch,PHAs,and cellulose biofoam products,along with their prop-erties and performance,as well as their manufacturing processes.Further efforts are still needed to unlock the full potential of these bio-based products and meet the goal of complementing and gradually replacing some of their fossil-based counterparts.Finally,the challenges,as well as arising opportunities of future research directions are discussed.

关键词： Biofoam Bio-based polyurethanes Polylactic acid Polyhydroxyalkanotate Starch Cellulose Manufacturing process

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Recent progress on green electromagnetic shielding materials based on macro wood and micro cellulose components from natural agricultural and forestry resources

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Nano Research 2022年第8期15卷 7506-7532页

作者： Chuanyin Xiong Tianxu Wang Yongkang Zhang Meng Zhu Yonghao Ni College of Bioresources Chemical&Materials Engineering Shaanxi University of Science and TechnologyXi’an 710021China limerick pulp&paper ctr University of New BrunswickFrederictonNB E3B 5A3Canada

Recent research efforts in the field of electromagnetic interference shielding(EMI)materials have focused on biomass as a green and sustainable resource.More specifically,wood and cellulose nano fiber(CNF)have many advantages,some of which include lightweight,porosity,widespread availability,low cost,and easy processing.These favorable properties have led researchers to consider these types of biomass as an EMI shielding material with great potential.At present,while many excellent published works in EMI shielding materials have investigated wood and CNF,this research area is still new,compared with non-biomass EMI shielding materials.More specifically,there is still a lack of in-depth research and summary on the preparation process,pore structure regulation,component optimization,and other factors affecting the EMI shielding of wood and CNF based EMI shielding materials.Thus,this review paper presents a comprehensive summary of recent research on wood and CNF based EMI shielding materials in recent three years in terms of the preparation methods,material structure design,component synergy,and EMI mechanism,and a forward future perspective for existing problems,challenges,and development trend.The ultimate goal is to provide a comprehensive and informative reference for the further development and exploration of biomass EMI shielding materials.

关键词： biomass materials wood and nano cellulose fiber electromagnetic interference shielding pore structure regulation component synergy

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Recent progress in the development of smart supercapacitors

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SmartMat 2023年第2期4卷 1-36页

作者： Chuanyin Xiong Tianxu Wang Zhenyang Zhao Yonghao Ni College of Bioresources Chemical and Materials Engineering Shaanxi University of Science and TechnologyXi'anChina Shandong Dongyi Photoelectric Instrument Co.Ltd YantaiChina University of New Brunswick Limerick Pulp&Paper CtrFrederictonNew BrunswickCanada

Recently,with the continuous development of human society and the continuous innovation of technologies,the intelligence era has arrived.Various intelligent electronic devices continue to be developed,in which flexible wearable electronic devices are highly favored by people.To meet the requirements of the normal operation of intelligent devices,the key point lies in the development of new smart energy storage devices.Accordingly,smart supercapacitors have been widely focused on and studied by researchers recently with the introduction of intelligent functions,such as electrochromism,self‐healing,and shape memory,into supercapacitors to broaden their application fields and promote their smart development.This can meet not only people's energy needs but also people's diverse personality needs and make our life more convenient,fast,and more intelligent than ever.Therefore,it is very important to summarize related work on smart supercapacitors.Although researchers have performed much research on smart supercapacitors,there is still little literature summary on the related work of different smart supercapacitors.Accordingly,this paper mainly introduces the research progress on electrochromic,self‐healing,shape memory,and self‐charging smart supercapacitors in recent years and discusses the development prospects and challenges of smart supercapacitors.

关键词： electrochromism intelligence self‐charging self‐healing shape memory smart supercapacitors

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Screen printing fabricating patterned and customized full paper-based energy storage devices with excellent photothermal,self-healing,high energy density and good electromagnetic shielding performances

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Journal of Materials Science & Technology 2022年第2期97卷 190-200页

作者： Chuanyin Xiong Mengrui Li Qing Han Wei Zhao Lei Dai Yonghao Ni College of Bioresources Chemistry&Materials Engineering Shaanxi University of Science and TechnologyShaanxi Prov Key Lab Papermaking Technol&SpeciaXi’an 710021China University of New Brunswick Limerick Pulp&Paper CtrFrederictonNB E3B 5A3Canada

Supercapacitors are favored by researchers because of their high power density,especially with the acceleration of people’s life rhythm.However,their energy density,especially from the point of view of the whole energy storage device,is far lower than that of commercial batteries.In this work,a kind of customizable full paper-based supercapacitor device with excellent self-healing ability is fabricated by simple and low-cost screen printing,electropolymerization and dip coating methods.The resultant separatorfree supercapacitor device exhibits both ultrahigh gravimetric and areal specific energy(power)densities of 39 Wh kg^(-1)(69 k W kg^(-1))and 692μWh cm^(-2)(236 m W cm^(-2)),achieving excellent supercapacitor performance.Notably,the addition of vitrimers endows the whole device with outstanding self-healing properties,which is helpful for enhancing the adaptability of the device to the environment.In addition,this kind of paper-based device also displays good photothermal and electromagnetic shielding performances.These striking features make paper matrix composites attractive in the fields of supercapacitors,medical photothermal treatment and electromagnetic shielding.

关键词： Customizable full paper-based supercapacitors Energy density Self-healing Photothermal Electromagnetic shielding

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A Novel Ternary Composite of Polyurethane/Polyaniline/Nanosilica with Antistatic Property and Excellent Mechanical Strength:Preparation and Mechanism

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Chinese Journal of Polymer Science 2022年第7期40卷 789-798页

作者： Xiu-Zhi Tian Rui Yang Jia-Jia Ma Yong-Hao Ni Hai-Bo Deng Lei Dai Jiao-Jun Tan Mei-Yun Zhang Xue Jiang College of Bioresource Chemical and Materials Engineering Shaanxi University of Science and TechnologyXi’an710021China College of Textile Science and Engineering Jiangnan UniversityWuxi214122China limerick pulp&paper Centre&Department of Chemical Engineering University of New BrunswickFrederictonNew BrunswickE3B5A3Canada

Antistatic and strength properties are of vital importance for polyurethane rubber used in moving parts of many industrial instruments.Herein,polyurethane was composited with polyaniline and nanosilica based on in situ synthesis of polymer and physical mixing of these fillers to reach desired antistatic and mechanical properties.Chemical,morphological and thermal properties of the polyurethane/polyaniline/nanosilica composites were studied.The electrical resistivity of the composite decreased from 1.1×10^(6)MΩto 7.6×10^(4)MΩas a result of the addition of 4%polyaniline.The tensile strength and elongation at break of the polyurethane composites improved by nearly 300%and100%,respectively,when compared with those of the neat polyurethane.The electronic resistance of PU/PANI/NS ternary is low enough for its antistatic property and decreases with the increase of the added nanosilica,which is unexpectedly and rather significant.Our results would shed light on the development of antistatic PU with excellent mechanical performance.

关键词： Polyurethane/polyaniline/nanosilica composites Antistatic property Mechanical property Molecular simulation

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Kinetics process for structure-engineered integrated gradient porous paper-based supercapacitors with boosted electrochemical performance

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Nano Research 2023年第7期16卷 9471-9479页

作者： Chuanyin Xiong Yongkang Zhang Jiayu Xu Weihua Dang Xuhui Sun Meng An Yonghao Ni Junjie Mao College of Bioresources Chemical&Materials Engineering Shaanxi University of Science and TechnologyXi’an 710021China College of Mechanical and Electrical Engineering Shaanxi University of Science and TechnologyXi’an 710021China University of New Brunswick Limerick Pulp&Paper CtrFrederictonNB E3B 5A3Canada College of Chemistry and Materials Science Anhui Normal UniversityWuhu 241000China

Due to their rich and adjustable porous network structure,paper-based functional materials have become a research hotspot in the field of energy storage.However,reasonably designing and making full use of the rich pore structure of paper-based materials to improve the electrochemical performance of paper-based energy storage devices still faces many challenges.Herein,we propose a structure engineering technique to develop a conductive integrated gradient porous paper-based(CIGPP)supercapacitor,and the kinetics process for the influence of gradient holes on the electrochemical performance of the CIGPP is investigated through experimental tests and COMSOL simulations.All results indicate that the gradient holes endow the CIGPP with an enhanced electrochemical performance.Specifically,the CIGPP shows a significant improvement in the specific capacitance,displays rich frequency response characteristics for electrolyte ions,and exhibits a good rate performance.Also,the CIGPP supercapacitor exhibits a low self-discharge and maintains a stable electrochemical performance in different electrolyte environments because of gradient holes.More importantly,when the CIGPP is used as a substrate to fabricate a CIGPP-PANI hybrid,it still maintains good electrochemical properties.In addition,the CIGPP supercapacitor also shows excellent stability and sensitivity for monitoring human motion and deaf-mute voicing,showing potential application prospects.This study provides a reference and feasible way for the design of structure-engineered integrated paper-based energy storage devices with outstanding comprehensive electrochemical performance.

关键词： conductive gradient porous paper electrochemical performance COMSOL simulations supercapacitor sensor

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Bio-modification of eucalyptus chemithermomechanical pulp

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Frontiers of Chemical Science and Engineering 2008年第1期2卷 28-33页

作者： Qifeng YANG Huaiyu ZHAN Shuangfei WANG Kecheng LI Shiyu FU State Key Laboratory of pulp&paper Engineering South China University of TechnologyGuangzhou 510640China pulp&paper Institute of Guangxi University Nanning 530004China Department of Chemical Engineering and limerick pulp and paper Centre University of New BrunswickFrecdericton NBCanada

Eucalyptus chemithermomechanical pulp(CTMP)was modified with the white-rot fungus 19-6 in a stationary culture condition.Different factors that influence the effect of white-rot fungus treatment,including additional nutrition,pH value,temperature,treatment time and oxygen input were investigated.The results show that the energy consumption of post refining of CTMP treated by white-rot fungus 19-6 was lower than that of untreated pulp and the strength properties also obviously improved.At a freeness level of about 330 mL,compared to the untreated pulp,the tensile index,tear index and internal bonding strength increased by 21.3%,27.4% and 33.1%,respectively.Unfortunately,the treatment with white-rot fungus substantially decreased all optical properties except for opacity,which was essentially unchanged.Brightness and light scatter-ing coefficient were reduced to as much as 25%and 21%compared to the untreated pulps.However,after a tow-stage“Na_(2)S_(2)O_(4)-H_(2)O_(2)”bleaching,the final brightness can reach 70.3%ISO,which is similar to that of the untreated CTMP.

关键词： eucalyptus CTMP white-rotfungus19-6 bio-modification

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NIR-responsive Collagen-based Sponge Coated with Polydimethylsiloxane/Candle Soot for Oil-Water Separation

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paper And Biomaterials 2022年第3期7卷 30-41页

作者： Min Zhang Chenchen Guo Yu Wang Yunlong Zhang Hui Wu Liulian Huang Yonghao Ni Cuicui Ding Lihui Chen College of Material Engineering Fujian Agriculture and Forestry UniversityFuzhouFujian Province350002China Department of Chemical Engineering and limerick pulp&paper Centre University of New BrunswickFrederictonE3B 5A3Canada College of Ecological Environment and Urban Construction Fujian University of TechnologyFuzhouFujian Province350108China

To fabricate an oil-water separation material that is rich in source,eco-friendly,and responsive,in this study,we successfully developed a collagen-based sponge for application to oil-water separation based on a green and facile strategy.In this design,widely-available collagen(COL)was used as the substrate:it was immersed in polydimethylsiloxane(PDMS)suspension with candle soot(CS)nanoparticles,followed by hot curing.The resultant sponge(CS/PDMS-COL)possessed good hydrophobicity with a water contact angle of 148.3°under a low PDMS concentration of 2%.The results from field emission scanning electron microscope,Fourier transform infrared spectrometer,X-ray photoelectron spectrometer,and X-ray diffractometry demonstrated the successful coating of CS and PDMS on the surface of COL substrate.The CS/PDMS-COL can adsorb eight oils,with the adsorption capacity for trichloromethane reaching 95 g/g.With benzene as the target adsorbent,the separation efficiency was maintained at no less than 95%even after recycling 20 times.CS/PDMS-COL was also used to separate oil-in-water emulsion.Moreover,the sponge killed bacteria effectively due to its excellent near-infrared photothermal responsiveness.This study provides new insight into the preparation of facile oil-water separation materials based on naturally occurring biomaterials effortlessly.

关键词： collagen sponge oil-water separation candle soot photothermal effect antibacterial property

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Dialdehyde cellulose nanocrystal cross-linked chitosan foam with high adsorption capacity for removal of acid red 134

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Frontiers of Chemical Science and Engineering 2023年第7期17卷 853-866页

作者： Xiuzhi Tian Rui Yang Chuanyin Xiong Haibo Deng Yonghao Ni Xue Jiang College of Bioresource Chemical and Materials Engineering Shaanxi University of Science and TechnologyXi’an 710021China College of Textile Science and Engineering Jiangnan UniversityWuxi 214122China Department of Chemical Engineering and limerick pulp and paper Centre University of New BrunswickFrederictonNB E3B 5A3Canada

The discharge of large amounts of dye-containing wastewater seriously threats the environment.Adsorbents have been adopted to remove these dyes present in the wastewater.However,the high adsorption capacity,predominant pH-responsibility,and excellent recyclability are three challenges to the development of efficient adsorbents.The poly(acryloxyethyl trimethylammonium chloride)-graft-dialdehyde cellulose nanocrystals were synthesized in our work.Subsequently,the cationic dialdehyde cellulose nanocrystal cross-linked chitosan nanocomposite foam was fabricated via freeze-drying of the hydrogel.Under the optimal ratio of the cationic dialdehyde cellulose nanocrystal/chitosan(w/w)of 12/100,the resultant foam(Foam-12)possesses excellent absorption properties,such as high porosity,high content of active sites,strong acid resistance,and high amorphous region.Then,Foam-12 was applied as an eco-friendly adsorbent to remove acid red 134(a representative of anionic dyes)from aqueous solutions.The maximum dye adsorption capacity of 1238.1 mg∙g^(‒1) is achieved under the conditions of 20 mg∙L‒1 adsorbents,100 mg∙L^(‒1) dye,pH 3.5,24 h,and 25℃.The dominant adsorption mechanism for the anionic dye adsorption is electrostatic attraction,and Foam-12 can effectively adsorb acid red 134 at pH 2.5–5.5 and be desorbed at pH 8.Its easy recovery and good reusability are verified by the repeated acid adsorption–alkaline desorption experiments.

关键词： chitosan foam cellulose nanocrystals acid red 134 adsorption

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