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

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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Using Artificial Neural Networks (ANN) for Modeling Predicting Hardness Change of Wood during Heat Treatment

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IOP Conference Series: materials science and Engineering 2018年第3期394卷

作者： Thi Hai Van Nguyen Tat Thang Nguyen Xiaodi Ji Khoa Thi Lanh Do Minghui Guo Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University Harbin 150040 China Vietnam National University of Forestry

In this study, an artificial neural network (ANN) model was built to study the relationship between the process parameters of heat treatment and the hardness of wood. Three important parameters: temperature (170, 180, 190, 200 and 210°C), treatment time (2, 4, 6 and 8h), and wood species (Larch and Poplar) were considered as the inputs to the neural network. There were four neurons in the hidden layer that were used, and an output layer as wood hardness. According to the results, the mean absolute percentage errors (MAPE) were determined as 0.1167%, 0.355% and 1.34% in the prediction of wood hardness values for training, validation, and testing data sets. Determination coefficients (R2) greater than 0.99 were obtained for all data sets with the proposed ANN models. These results show that ANN models can be used successfully for predicting hardness changes hardness of wood during heat treatment.

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Sustainable preparation and characterization of thermally stable and functional cellulose nanocrystals and nanofibrils via formic acid hydrolysis

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Journal of bioresources and bioproducts 2017年第1期2卷 10-15页

作者： Haishun Du Chao Liu Dong Wang Yuedong Zhang Guang Yu Chuanling Si Bin Li Xindong Mu Hui Peng CAS Key Laboratory of Bio-based Material Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Tianjin Key Laboratory of Pulp and Paper College of Papermaking Science and TechnologyTianjin University of Science and TechnologyTianjin 300457China CHTC Helon Co.Ltd. Weifang 261100China

In this work,a sustainable method to prepare functional cellulose nanocrystals(CNCs)and cellulose nanofibrils(CNFs)using formic acid(FA)(a recoverable organic acid)was *** FA hydrolysis,the obtained CNCs could be well dispersed in ***,the CNC products and fibrous cellulosic solid residue(FCSR)in DMAC could be easily separated by a conventional centrifugal process,and the collected FCSR could be further fibrillated to CNFs with relatively low-intensity mechanical fibrillation *** isolated CNC products showed high crystallinity index(about 75%)and excellent thermal stability(with onset thermal degradation temperature of 325℃).Both the resultant CNCs and CNFs showed better dispersibility in DMSO,DMF and DMAC respectively because of the introduction of ester groups on the surface of the *** presence of surface ester groups could increase the interface compatibility of nanocelluloses with polymeric matrices and enable their applications in reinforcing polymeric matrix materials(*** composite films like PHVB+CNFs).

关键词： Cellulose nanocrystals Cellulose nanofibrils Formic acid hydrolysis Sustainable process CNF/PHBV nanocomposites

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Preparation of three modified natural zeolite powders and antibacterial properties of antibacterial paper prepared using them as fillers

Preparation of three modified natural zeolite powders and an...

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China Functional material technology and Industry Forum, CFMTIF 2015

作者： Yuan, Lin Qian, Xue-Ren Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University HarbinHeilongjiang Province150040 China

ISBN: (纸本)9783038357551

Natural zeolite powders, 600 meshes in size, were pretreated with three strong acids, then reacted with sodium chloride, sodium sulfate, sodium nitrate, respectively, and yielded sodium zeolite. The samples were loaded Ag++Zn2+, Ag++Cu2+, Zn2++Cu2+, and Ag++Cu2++Zn2+ions through ion exchange to prepare the antibacterial zeolite powders. The powders were tested by MIC, SEM/EDXA and XRD. The results demonstrated that the pretreatment of zeolite powder with nitric acid could achieve a larger loading amount of metal ions compared to hydrochloric acid and sulfuric acid, and the samples loaded with Ag++Zn2+, Ag++Cu2+，Ag++Cu2++Zn2+could attain excellent antibacterial properties with an MIC of 8 μg/ml to S. aureus Adding 5% of the aforementioned antibacterial zeolite powders to paper as filler resulted in an impressive antibacterial effect against S. aureus, as the inhibitory rate could reach to almost 100% in 1 h. © 2016 Trans Tech Publications, Switzerland.

关键词： Metal ions

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Nanoparticle Separation: Wood-Derived Nanofibrillated Cellulose Hydrogel Filters for Fast and Efficient Separation of Nanoparticles (Adv. Sustainable Syst. 9/2019)

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Advanced Sustainable Systems 2019年第9期3卷

作者： Yushu Wang Jialiang Wang Shengjie Ling Haiwei Liang Ming Dai Lulu Bai Qing Li Zhuangjun Fan Sang-Young Lee Haipeng Yu Shouxin Liu Qingwen Wang Yixing Liu Jian Li Tianmeng Sun Wenshuai Chen Key Laboratory of Bio-Based Material Science and Technology Ministry of Education Northeast Forestry University Harbin 150040 P. R. China Key Laboratory of Organ Regeneration and Transplantation Ministry of Education The First Hospital and Institute of Immunology Jilin University Changchun 130061 P. R. China School of Physical Science and Technology Shanghai Tech University Shanghai 201210 P. R. China Department of Chemistry University of Science and Technology of China Hefei 230026 P. R. China School of Materials Science and Engineering China University of Petroleum Qingdao Qingdao 266580 P. R. China Department of Energy Engineering School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea

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First International Symposium on Nanocellulosic materials,Hangzhou,China:Spurring Research and Innovation in Nanocellulosic materials by Bringing Creative Minds Together

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Journal of bioresources and bioproducts 2017年第3期2卷 93-94页

作者： Jing Shen Zhibin He Huining Xiao Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Material Science and Engineering CollegeNortheast Forestry UniversityHarbin 150040China Department of Chemical Engineering&Limerick Pulp and Paper Centre University of New BrunswickFrederictonNBE3B 5A3Canada

From May 20 to May 21,2017,the 1st International Symposium on Nanocellulosic materials,hosted by China Technical Association of Paper Industry(CTAPI)and its affiliated Nanocellulose and materials Committee,was held in Hangzhou,*** timely symposium attracted about 270 attendees from 8 countries,bringing creative minds together for facilitating more breakthroughs in research,innovation,and commercialization.

关键词： Nanocellulose Nanocellulosic materials China Symposium Hangzhou

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Application of Arduino Control Mainboard with Color Light Sensor TCS3200 in Color Recognition of Edge Banding In Laser Edge Banding Machine

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IOP Conference Series: Earth and Environmental science 2019年第2期252卷

作者： Trong Tuan Nguyen Tat Thang Nguyen Van Tuu Nguyen Chi Cong Cao Jun Hua Department of Mechanical Design and Theory College of Mechanical Engineering Northeast Forestry University Harbin 150040 China Vietnam Academy of Forest Sciences Ha Noi Vietnam Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University Harbin 150040 P.R. China. Vietnam National University of Forestry Ha Noi Viet Nam Traffic College Northeast Forestry University Harbin 150040 P.R. China.

In the laser edge banding system, automatic color reading and adjustment of input color matching that of edge banding is an important factor in achieving high automation level. This paper describes a working prototype designed for color-based automatic sorting of objects. TCS3200 sensor was used to detect the color of the product; and Arduino board was used to control the overall process in which matching sealing edge was introduced. Color input was based on analysis of reading of TCS3200 sensor. Results illustrated matching of color in a series of products coded E1, E2, E3, E4, E5, E6, E7, and E8. According to the results, we concluded that laser edge sealing reduces unstable factors, reduces labor and stalibizes product quality.

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Cover Feature: Nitrogen, Sulfur, Phosphorous Co-doped Interconnected Porous Carbon Nanosheets with High Defect Density for Enhancing Supercapacitor and Lithium-Ion Battery Properties (ChemElectroChem 17/2018)

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ChemElectroChem 2018年第17期5卷 2319-2319页

作者： Hanwei Wang Chao Wang Baokang Dang Ye Xiong Prof. Chunde Jin Prof. Qingfeng Sun Prof. Min Xu School of Engineering Zhejiang A&F University No. 666 Wusu Road Hangzhou 311300 China Key Laboratory of Bio-Based Material Science and Technology Northeast Forestry University Harbin 150040 P.R. China

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The Effect of Pretreatment Method on the Decorative Effect of the Wax Furniture

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IOP Conference Series: materials science and Engineering 2018年第2期452卷

作者： Thanh Giang Dao Tat Thang Nguyen Xiaoxue Song Xuting Wang Kuian Song Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University Harbin 150040 China Northeastern College of Agriculture and Forestry Quang Ninh VietNam Vietnam National University of Forestry Ha Noi Viet Nam

In this study, the authors used hot wax selected from beeswax and insect wax. These two types of wax are blended with a 1: 1 ratio. Then use three methods of surface treatment before wax coating on the Ash wood surface including hydrothermal method, compound lye method, and plasma method. Through comparative analysis of 4 properties: color, adhesion, hardness and surface properties of the hydrophobic coating. The results show that the hot wax coating on the ash surface can maintain the original color of the wood. Comparison of three methods of wood treatment shows that: plasma method for the coating surface has the best adhesion, hydrothermal method for best surface hardness of the coating, and the hydrophobicity of hot wax after hydrothermal pretreatment is the best.

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Nanocellulosic materials:research/production activities and applications

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Journal of bioresources and bioproducts 2017年第2期2卷 45-49页

作者： Xingye An Dong Cheng Jing Shen Qingming Jia Zhibin He Linqiang Zheng Avik Khan Bo Sun Bitao Xiong Yonghao Ni Tianjin Key Laboratory of Pulp and Paper Tianjin University of Science and TechnologyTianjin 300457China Department of Chemical Engineering University of New BrunswickFrederictonNew BrunswickE3B 5A3Canada Key Laboratory of Bio-based Material Science and Technology Ministry of EducationNortheast Forestry UniversityHarbin 150040China Department of Chemical Engineering Kunming University of Science and TechnologyKunming 650093China Key Laboratory of Food Nutrition and Safety Tianjin University of Science and TechnologyMinistry of EducationTianjin 300457China School of Science Zhejiang University of Science and TechnologyHangzhouZhejiang310023China.

Nanocelluloses have emerged as novel materials and attracted significant interest from both academia and *** can now be produced at pilot plant and pre-commercial scales,and even at commercial scales in some regions in the *** commercial applications of nanocelluloses have entered commercial stages though their full potentials are yet to be *** this short communication,the applications of these nanomaterials are high-lighted,including high-volume applications(e.g.,paper,textiles),high-value applications(e.g.,aerogels and structure materials for aerospace),and novel/emerging applications(e.g.,organic light emitting diodes,photonic films).Close collaboration between industries and the academic world would facilitate the development of commercial markets for using nanocelluloses in existing/new areas.

关键词： Nanocelluloses Nanocrystalline cellulose(NCC) Nanofibrillated cellulose(NFC) Cellulose filaments(CF) Cellulose whiskers(CW)

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