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Converting a Dilute Slurry of Hollow Tube-like Papermaking Fibers into Dynamic Hydrogels

Journal of Bioresources and Bioproducts 2019年第4期4卷 214-221页

作者： Zhongfei YUAN Hongjia LIN xueren qian Jing SHEN Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry UniversityHarbin 150040China

Commercially,assembly-directed packing of hollow tube-like papermaking fibers with widths of roughly 10–50μm)into sustainable microfibrous bioassemblies(i.e.,paper-based products)starts with a dilute fiber *** this process,a huge amount of water is required to disperse and transport fibers,which also facilitates colloidal interactions and formation of interfiber *** form bioassemblies in their dry states,unit operations associated with dewatering and drying are routine practices,and treatment of the generated wastewater is a *** herein present a facile,easily scalable concept of converting fiber slurry into dynamic hydrogels by using chemical additives(similar to papermaking wet-end additives),but without water *** used a typical group of additives as an example in an attempt to demonstrate the applicability of the *** boron-based dynamic chemistry as a key theoretical foundation,the combination of crosslinking and hydrogen bonding can lead to the formation of phase-reversible,self-healable,and stretchable ***,the characteristics of hydrogels are facilely tunable,and process parameters such as polymer dosage are rather *** is worth noting that fibers can act as a structural skeleton or mechanical support for tailorable design of *** concept demonstrated in this study provides insights into value-added utilization of mass-producible biopolymeric fibers in accordance with existing industrial ***-based hydrogels would find use in diversified applications:toys,3D/4D printing materials,soft robots,drug delivery systems,among others.

关键词： papermaking fibers colloidal interactions dynamic hydrogels self-healability value-added applications

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Improving Electrochemical Performance of Cellulose Fiber-based Supercapacitor Electrode Using Polypyrrole-wrapped Iron Oxyhydroxide

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Paper And Biomaterials 2021年第3期6卷 10-19页

作者： Youngchu Kang Hailan Jin Xianhui An xueren qian Key Laboratory of Bio-based Material Science&Technology(Northeast Forestry University)Ministry of Education HarbinHeilongjiang Province150040China

Polypyrrole(PPy)@cellulose fiber-based composites have been widely investigated as electrode materials for use in flexible ***,they cannot readily provide high specific capacitance and cyclic stability owing to their inherent drawbacks,such as high resistance,Weber impedance,and volume expansion or collapse during charging/*** this study,iron oxyhydroxide(FeOOH)is incorporated in the abovementioned composite to decrease the equivalent series resistance,charge transfer resistance,and Weber impedance,thereby enhancing electron transfer and ion diffusion,which results in superior electrochemical *** PPy-wrapped FeOOH@cellulose fiber-based composite electrode with the molar ratio of FeSO_(4) to NaBH4 of 1∶1 exhibits a high specific capacitance of 513.8 F/g at a current density of 0.2 A/g,as well as an excellent capacitance retention of 89.4% after 1000 cycles.

关键词： cellulose fibers iron oxyhydroxide polypyrrole electrode material electrochemical performance

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Nano-Cu2O-loaded Paper: Green Preparation and High Visible Light Photocatalytic Performance for Formaldehyde Removal

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Paper And Biomaterials 2019年第3期4卷 1-14页

作者： Lijian Sun Xin Xin Xianhui An xueren qian Key Laboratory of Bio-based Materials Science and Technology of Ministry of Education Northeast Forestry University

The removal of formaldehyde (HCHO) from indoor air is of great importance to reduce health risks and improve indoor air quality. In this study, nano-Cu2O-loaded paper with superior photocatalytic activity under visible light for the removal of HCHO was fabricated through a green, simple, and fast in situ synthesis method. The optimum preparation conditions for nano-Cu2O-loaded paper were as follows: 2 g (oven-dry basis) cellulose fibers, CuSO4 dosage 8 g, NaOH dosage 1.6 g, temperature 80℃, 60 min for Cu2+ absorption, and 60 min for reaction. Under the optimum conditions, the Cu2O deposition ratio approached 30% and the nano-Cu2O-loaded paper exhibited a catalytic efficiency of approximately 97% for HCHO removal. The photocatalytic capacity of nano-Cu2O-loaded paper for HCHO removal had a positive correlation with the deposition ratio of nano Cu2O particles. Excellent antibacterial property of nano- Cu2O-loaded paper against Staphylococcus aureus and Escherichia coli was also confirmed. Moreover, nano-Cu2O-loaded paper was proven to be hydrophobic.

关键词： nano-Cu2O-loaded paper in situ synthesis visible light photocatalytic activity HCHO removal

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Coaxing Polysaccharide Granules into Supramolecular Biocolloidal Additives for Papermaking

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Paper And Biomaterials 2020年第2期5卷 1-19页

作者： Yongsheng Wang Wenyuan Zhu xueren qian Meiyun Zhang Shunxi Song Chuyan Jing Zhengren Meng Shiyu Xu Xianhui An Xiujie Huang Jing Shen Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry UniversityHarbinHeilongjiang Province150040China Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Nanjing Forestry UniversityNanjingJiangsu Province210037China College of Bioresources Chemical and Materials Engineering National Demonstration Center for Experimental Light Chemistry Engineering EducationShaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper DevelopmentShaanxi University of Science&TechnologyXi'anShaanxi Province710021China

In light of developments in polysaccharide-based sustainable processes involving supramolecular interactions,we herein present our findings pertaining to coaxing polysaccharide granules into functional supramolecular *** biocolloidal dispersions containing various forms of starch are facilely designable,essentially built upon complexation between disassembled native cornstarch granules and amphiphilic *** moieties of guest molecules are dynamically attractable into cavities of helical structures,with cationic groups pointing toward the bulk *** noncovalent attraction can generate core-shell biocolloidal *** significantly higher gelatinizability of freeze-dried biocolloids in contrast to native cornstarch granules is attributable to complex formation,and a homogenous dispersion is readily formable at room *** results also show biocolloids'ligand-related antibacterial *** use of biocolloids as wet-end additives for biofiber assemblies(cellulosic paper)can enhance mechanical strength,fines retention,and filler *** biocolloids with positively charged,translucent,easily gelatinizable,antibacterial,and polysaccharide-bondable functionalities would find tailorable use in the paper industry.

关键词： polysaccharide granules inclusion complex supramolecular biocolloids functionalities papermaking wet-end chemistry

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Flexible Nanopaper Composed of Wood-Derived Nanofibrillated Cellulose and Graphene Building Blocks

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Journal of Renewable Materials 2021年第3期9卷 451-461页

作者： Qing Li Ming Dai xueren qian Tian Liu Zhenbo Liu Yu Liu Ming Chen Wang He Suqing Zeng Yu Meng Chenchen Dai Jing Shen Yingtao Liu Wenshuai Chen Wenbo Liu Ping Lu College of Material Science and Engineering Northeast Forestry UniversityHarbin150040China Department of Chemistry and Biochemistry Rowan UniversityGlassboroNJ08028USA

Nanopaper has attracted considerable interest in the fields of films and paper ***,the challenge of integrating the many advantages of nanopaper still ***,we developed a facile strategy to fabricate multifunctional nanocomposite paper(NGCP)composed of wood-derived nanofibrillated cellulose(NFC)and graphene as building *** suspension was consisted of long and entangled NFCs(10–30 nm in width)and their *** NGCP formation,NFC was chemically modified with a silane coupling agent to ensure that it could interact strongly with graphene in *** resulting NGCP samples were flexible and could be bent repeatedly without any structural *** the NGCP samples,the high aspect ratio of NFC made a major contribution to its high mechanical strength,whereas the sheet-like graphene endowed the NGCP with electrical resistance and electrochemical *** mechanical strength of the NGCP samples decreased as their graphene content ***,the electrical resistance and electrochemical activity of the NGCP samples both rose with increasing content of *** NGCPs still kept advantageous mechanical properties even at high temperatures around 300℃ because of the high thermal stability of NFCs and their strong entangled web-like *** view of its sustainable building blocks and multifunctional characteristics,the NGCP developed in this work is promising as low-cost and high-performance nanopaper.

关键词： Nanofibrillated cellulose graphene flexible nanopaper mechanical strength electrical resistance

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卤氧化铋/纸浆纤维复合光催化纸的原位制备及甲醛去除效果研究

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中国造纸 2020年第3期39卷 1-7页

作者：耿巍钱学仁安显慧东北林业大学生物质材料科学与技术教育部重点实验室黑龙江哈尔滨150040

将卤氧化铋(BiOX,X=Cl、Br、I)原位沉积至纸浆纤维(PFs)上,制得BiOX/PFs复合光催化纸,并对其甲醛去除性能进行了评价。研究发现,在相同BiOX沉积率下,BiOI/PFs复合光催化纸的甲醛去除性能最佳,甲醛去除率为75%。与BiOCl/PFs复合光催化纸... 详细信息

将卤氧化铋(BiOX,X=Cl、Br、I)原位沉积至纸浆纤维(PFs)上,制得BiOX/PFs复合光催化纸,并对其甲醛去除性能进行了评价。研究发现,在相同BiOX沉积率下,BiOI/PFs复合光催化纸的甲醛去除性能最佳,甲醛去除率为75%。与BiOCl/PFs复合光催化纸相比,BiOBr/PFs和BiOI/PFs复合光催化纸具有更优异的可见光催化性能,甲醛去除率分别为61%、74%和75%。采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、X-射线光电子能谱仪(XPS)及电化学阻抗谱(EIS)等对BiOX/PFs复合光催化纸进行了表征,证明BiOX成功与PFs复合,最后对BiOX/PFs复合光催化纸的可见光降解甲醛机理进行了分析。

关键词：光催化纸原位沉积卤氧化铋甲醛去除

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Conductive Polyaniline/Cellulose/Graphite Composite Films with High Thermal Stability and Antibacterial Activity

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Paper And Biomaterials 2017年第1期2卷 40-51页

作者： JingHuan Chen JinGang Liu WenTao Zhang Kun Wang xueren qian RunCang Sun National Engineering Laboratory of Pulping and Papermaking China National Pulp and Paper Research Institute Beijing Key Laboratory of Lignocellulosic Chemistry Beijing Forestry University Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education Northeast Forestry University

Functional composite films were successfully prepared from cellulose, graphite(GP), and polyaniline(PANI) using a combination of physical and chemical processes. Cellulosewasdissolved in N-methylmorpholine-N-oxide monohydrate(NMMO) and regenerated in water to form the matrix. GP was dispersed in the NMMO solvent prior to the dissolution of the cellulose, and PANI was deposited on the surfaces of the cellulose/GP films by in situ chemical polymerization. The structures of the PANI/cellusose/GP composite films were investigated using X-ray diffraction analysis, Fourier transform infrared spectroscopy, scanning electron microscopy(SEM), and SEM/energy-dispersive X-ray spectroscopy. The mechanical strengths, thermal stabilities, conductivities, and antibacterial activities of the films were studied in detail. The results showed that GP formed a multilayered structure in the cellulose matrix and that the PANI nanoparticles were tightly wrapped on the film surface. The film thickness increased from 40 mm to 100 mm after the addition of GP and PANI. The tensile strength of the composite films was 80~107 MPa, with the elongation at break being 3%~10%. The final residual weight of the composite films was as high as 65%, and the conductivity of the composite films reached 14.36 S/m. The cellulose matrix ensured that the films were flexible and exhibited desirable mechanical properties, while the GP filler significantly improved the thermal stability of the films. The PANI coating acted as a protective layer during burning and provided good electrical conductivity and antibacterial activity against Escherichia coli; both of these characteristics were slightly enhanced by the incorporation of GP. These PANI/cellulose/GP composite films should be suitable for use in electronics, antistatic packing, and numerous other applications.

关键词： cellulose graphite polyaniline conductive film thermal stability antibacterial activity

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聚吡咯/纸浆纤维复合光热纸的制备及其太阳能驱动界面水蒸发研究

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中国造纸 2022年第11期41卷 113-123页

作者：胡颖安显慧钱学仁东北林业大学生物质材料科学与技术教育部重点实验室黑龙江哈尔滨150040

本研究以未漂硫酸盐针叶木浆为原料,采用原位聚合法制备具有良好亲水性、高能量转换效率的聚吡咯/纸浆纤维复合光热纸,并应用于太阳能驱动界面水蒸发。对光热纸的表面形貌和结构进行了表征,探究了吡咯浓度以及单体与氧化剂摩尔比对纸光... 详细信息

本研究以未漂硫酸盐针叶木浆为原料,采用原位聚合法制备具有良好亲水性、高能量转换效率的聚吡咯/纸浆纤维复合光热纸,并应用于太阳能驱动界面水蒸发。对光热纸的表面形貌和结构进行了表征,探究了吡咯浓度以及单体与氧化剂摩尔比对纸光热性能的影响。结果表明,随吡咯浓度和氧化剂用量的增加,纸的光热性能也随之提升,当吡咯浓度为5 g/L、单体与氧化剂摩尔比为1∶2时,在1 kW/m^(2)的光照强度下,5 min内光热纸的表面温度可达85.3℃,水蒸发效率可达93.13%。具有优异能量转换效率和良好可循环性能的光热纸的成功开发,为太阳能水净化提供了一种潜在的技术方案。

关键词：光热纸聚吡咯太阳能界面水蒸发

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PPy@FeOOH/CFs纸基柔性电极的原位制备与性能研究

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中国造纸 2021年第5期40卷 1-9页

作者：窦天佑钱学仁安显慧东北林业大学生物质材料科学与技术教育部重点实验室黑龙江哈尔滨150040

本研究以纤维素纤维(CFs)为基底,通过两步原位沉积法,先后在CFs基底上沉积了羟基氧化铁(FeOOH)和聚吡咯(PPy)制得PPy@FeOOH/CFs纸基柔性电极材料(PFC),通过扫描电子显微镜(SEM)、X射线衍射仪(XRD)、傅里叶变换红外光谱仪(FT-IR)及X射线... 详细信息

本研究以纤维素纤维(CFs)为基底,通过两步原位沉积法,先后在CFs基底上沉积了羟基氧化铁(FeOOH)和聚吡咯(PPy)制得PPy@FeOOH/CFs纸基柔性电极材料(PFC),通过扫描电子显微镜(SEM)、X射线衍射仪(XRD)、傅里叶变换红外光谱仪(FT-IR)及X射线光电子能谱仪(XPS)等对纸基柔性电极材料进行了表征,表明PFC成功制备。在0.6 mol/L的H_(2)SO4中,通过循环伏安法(CV)、恒流充放电(GCD)和电化学阻抗谱(EIS)对制备的PFC电化学性能进行测试。发现相较于PPy@CFs,PFC拥有更快的电子转移和离子扩散速度以及更高的电化学储能性能。其中以添加量3 mmol的FeSO4·7H_(2)O作为铁源生成的PFC-3在1.0 A/g电流密度下的质量比电容为357.8 F/g,高于同等条件下PPy@CFs的比电容219.3 F/g,具有更优异的电化学性能,此外PFC-3在电流密度为4.0 A/g时质量比电容为0.5 A/g时的47.47%,而电流密度为4.0 A/g时,PPy@CFs质量比电容仅为0.5 A/g时的29.57%,PFC-3表现出更好的倍率性能和应用潜力。

关键词：纸基电极原位沉积法羟基氧化铁聚吡咯

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柔性基金属氧化物超级电容器电极材料的研究进展

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功能材料 2019年第8期50卷 8040-8050页

作者：黄继伟钱学仁安显慧李响东北林业大学材料科学与工程学院生物质材料科学与技术教育部重点实验室

作为一种介于传统电容器和电池之间的新型电化学储能器件,超级电容器的整体性能主要受限于电极材料。研究发现,具有赝电容特性的过渡金属氧化物因其多重氧化态、多金属离子特性和高理论比容量,在电化学储能相关领域备受关注。首先简要... 详细信息

作为一种介于传统电容器和电池之间的新型电化学储能器件,超级电容器的整体性能主要受限于电极材料。研究发现,具有赝电容特性的过渡金属氧化物因其多重氧化态、多金属离子特性和高理论比容量,在电化学储能相关领域备受关注。首先简要阐述了柔性超级电容器的结构及储能机理。然后,概述了以不同元数的过渡金属氧化物为主体构筑的“二元”和“三元”柔性复合电极材料。接着,总结了由复合电极材料组装成的柔性超级电容器在可穿戴电子设备和多功能柔性器件--储能智能窗(ESS窗)方面的应用。最后,提出了过渡金属氧化物基柔性超级电容器在实际应用中所面临的挑战及今后的主要研究方向。

关键词：超级电容器电极材料柔性基底金属氧化物

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