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Photoluminescence: Novel Quercetin Aggregation‐Induced Emission Luminogen (AIEgen) with Excited‐State Intramolecular Proton Transfer for In Vivo bioimaging (Adv. Funct. Mater. 11/2018)

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Advanced Functional materials 2018年第11期28卷

作者： Ting He Na Niu Zhijun Chen Shujun Li Shouxin Liu Jian Li Key Laboratory of Bio‐Based Material Science and Technology of Ministry of Education Northeast Forestry University Hexing Road 26 Harbin 150040 P. R. China College of Science Northeast Forestry University Hexing Road 26 Harbin 150040 P. R. China

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High-Performance PVAc-based Core/Shell Composite Emulsion: Preparation, Morphology and Properties

High-Performance PVAc-Based Core/Shell Composite Emulsion: P...

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2016中国国际功能材料大会(CIFM 2016)暨第九届中国功能材料及其应用学术会议(9th NCFMA)

作者： Xiao Zhang Zhao Jia Zhiguo Li Jiyou Gu College of Material Science and Engineering Key Laboratory of Bio-Based Material Science and TechnologyNortheast Forestry University

based on the practical problems of the poly(vinyl acetate) emulsion in application, i.e. the poor waterand heat- resistance and the poor low temperature resistant and so on, a novel design idea was proposed for fabricating one-component and high-performance poly(vinyl acetate)-based core/shell emulsions by the grafting and grafting-copolymerization. The theory of particle design was used as the basis to fabricate the core/shell structural composite emulsion with vinyl acetate polymer as core, the polymer of hydrophobic monomer as shell. The poly(vinyl acetate)-based core-shell composite emulsions with various morphologies were synthesized via the technique of "starved feeding" and semi-continuous seededemulsion polymerization. The effect of react conditions on morphologies and structures of the products, such as core/shell ratio, the content of grafting/copolymerization monomer etc. was thoroughly investigated with the structural and morphological test means, including FTIR、DSC、DLS and micro morphology characterizations(SEM, TEM). The particle size of the prepared composite core/shell latex particles was about 250-330 nm, and the particle morphology had obviously multiple evolution trend, in which there were three typical morphologies, strawberry type, semi-coated type and ball-type, respectively. The boiling water time of adhesive bonded sample was more than 180 minutes. The maximum values of adhesive dry strength and wet strength of the prepared composite emulsion were 10.4MPa and 2.7MPa, respectively. based upon the experimental results, the possible formation mechanisms and morphological evolution mechanism of the prepared latex particles were discussed.

关键词： Poly(vinyl acetate)-based composite emulsion inverse core/shell structure grafting/grafting-copolymerization morphological evolution adhesive performance

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Towards greener and more sustainable cellulose-based hand sanitizer products

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Journal of bioresources and bioproducts 2017年第2期2卷 50-54页

作者： Bo Sun Min Zhang Zhibin He Linqiang Zheng Jing Shen Yonghao Ni Key Laboratory of Food Nutrition and Safety(Tianjin University of Science and Technology) Ministry of EducationTianjin 300457China Department of Chemical Engineering University of New BrunswickFrederictonNew BrunswickE3B 5A3Canada Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry UniversityHarbin 150040China Tianjin Food Safety&Low Carbon Manufacturing Collaborative Innovation Center Tianjin300457China

More than 85%of the currently marketed hand sanitizer products are alcohol-based products,and the alcohol content is usually about 70%in order to be *** high alcohol content can cause dehydration,which is undesirable for sensitive skin,particularly for *** creates opportunities for the development of innovative hand sanitizer products that are free of alcohol and have green nano-cellulose-based materials as carriers for the antibacterial *** skin affinity and biocompatibility are the special features of the newly developed products,which would satisfy the need of the general public for green products.

关键词： Hand Sanitizer Alcohol-free Nano-cellulose-based Products biocompatibility

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Study material ratio green bean powder and polylactic acid powder for the 3D printing technology selective laser sintering

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

作者： Ba Bach Dinh Yanling Guo Tat Thang Nguyen Hui Zhang Yueqiang Yu College of Mechanical and Electrical Engineering Northeast Forestry University Harbin 150040 China Vietnam National University of Forestry Hanoi 156200 Vietnam Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University Harbin 150040 P.R. China.

The world's population is increasing, so the demand for material also increases. Currently scientists are therefore searching for new materials that have a stable supply of large quantities. The combination of green bean powder with polylactic acid powder has a composition ratio (10/90; 20/80; 70/30 and 40/60 (wt/wt)) used as input material for 3d printing technology SLS. High-power laser experiments were performed on a mixture of green bean powder and polylactic acid powder (GBCP), which produced a new synthetic material both biodegradable. Then, the GBCP composite material was tested for mechanical properties in each type of mixing ratio, observing the cross section of the material structure. Results obtained at 20/80 (wt/wt) mixing ratio of GBCP composite have a tensile strength of 2.5705 MPa, bending strength of 5 MPa and impact strength of 0.501kJ/m2.

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Thermoplastic Starch Prepared with Different Plasticizers: Relation between Degree of Plasticization and Properties

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Journal of Wuhan University of technology(materials science) 2015年第2期30卷 423-428页

作者：左迎峰 GU Jiyou TAN Haiyan 张彦华 Key Laboratory of Bio-based Material Science and Technology (Ministry of Education) Northeast Forestry University

Ethylene glycol, glycerol, sorbitol, formamide, and urea were used as plasticizers for the preparation of thermoplastic starch（TPS） from corn starch. The properties of TPS were tested by analysis method. The results showed that TPSs were more highly plasticized with amines than alcohols. For the same type of plasticizer, the degree of plasticization decreased as the molecular weight of plasticizer increased. The relationship between plasticization degree and TPS properties was characterized and described by mechanical properties and water absorption. The experimental results showed that when the degree of plasticization increased, the tensile strength decreased and the elongation at breakage and water absorption increased.

关键词： corn starch plasticizer thermoplastics degree of plasticization properties

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Preparation of urea-formaldehyde paraffin microcapsules modified by carboxymethyl cellulose as a potential phase change material

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Journal of Forestry Research 2015年第1期26卷 253-260页

作者： Zhan-hua Huang Xin Yu Wei Li Shou-xin Liu Key Laboratory of Bio-based Material Science and Technology Ministry of EducationNortheast Forestry University

We prepared spherical microcapsules modified by carboxymethyl cellulose（CMC） with urea-formaldehyde（UF） resin as a shell material with a two-step process by in situ polymerization, and characterized the microcosmic features, chemical structure, and thermal performance of the microcapsules by SEM, FTIR, DSC, and TGA. We studied the effects of different experimental parameters of curing p H, the amounts of the emulsifier and emulsion speed. The CMC-UF microcapsules had good heat resistance and stability. The enthalpy of CMC-UF microcapsules reached 50.33 J g-1. Therefore, CMC-UF resin can be used as a potential wall material of phase change materials.

关键词： Spherical microcapsules Carboxymethyl cellulose Energy storage

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Properties of paper mill sludge–wood fiber–HDPE composites after exposure to xenon-arc weathering

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Journal of Forestry Research 2015年第2期26卷 509-515页

作者： Xiaohui Yang Xianquan Zhang Weihong Wang Haibing Huang Shujuan Sui Key Lab of Bio-Based Material Science & Technology of Education Ministry Northeast Forestry University Heilongjiang Wood Science Research Institute

We used paper mill sludge（PMS） to substitute for part of the wood fibers（WF） used to reinforce high density polyethylene（HDPE）.The resulting composites were subjected to xenon-arc *** composite filled with limited PMS（under 10 %） had mechanical properties and aging resistance similar to those without *** composites containing more PMS faded and cracked more readily than those without *** on the carbonyl index,crystallinity,and wood index,PMS appeared to accelerate the degradation of composites during *** PMS to WF–HDPE composites reduced the weathering resistance,and this reduction was not significant if the PMS content did not exceed 20 % of the wood ***,PMS could be used as a reinforcement in wood-plastic composites at levels less than20 % of the wood fiber content.

关键词： Wood fiber Paper mill sludge HDPE Composites Xenon-arc weathering

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Wood‐Derived Ultrathin Carbon Nanofiber Aerogels

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Angewandte Chemie 2018年第24期130卷

作者： Si‐Cheng Li Bi‐Cheng Hu Yan‐Wei Ding Hai‐Wei Liang Chao Li Zi‐You Yu Zhen‐Yu Wu Wen‐Shuai Chen Shu‐Hong Yu Division of Nanomaterials & Chemistry Hefei National Research Center for Physical Sciences at the Microscale Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry CAS Center for Excellence in Nanoscience Hefei Science Center of CAS University of Science and Technology of China Hefei Anhui 230026 P. R. China Key laboratory of Bio-based Material Science and Technology Ministry of Education Northeast Forestry University Harbin 150040 P. R. China

Carbon aerogels with 3D networks of interconnected nanometer‐sized particles exhibit fascinating physical properties and show great application potential. Efficient and sustainable methods are required to produce high‐performance carbon aerogels on a large scale to boost their practical applications. An economical and sustainable method is now developed for the synthesis of ultrathin carbon nanofiber (CNF) aerogels from the wood‐based nanofibrillated cellulose (NFC) aerogels via a catalytic pyrolysis process, which guarantees high carbon residual and well maintenance of the nanofibrous morphology during thermal decomposition of the NFC aerogels. The wood‐derived CNF aerogels exhibit excellent electrical conductivity, a large surface area, and potential as a binder‐free electrode material for supercapacitors. The results suggest great promise in developing new families of carbon aerogels based on the controlled pyrolysis of economical and sustainable nanostructured precursors.

关键词： Cellulose-Nanofasern Holz Kohlenstoff-Nanofaser-Aerogele Pyrolysechemie Superkondensatoren

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Tailoring starch-engineered mineral particles towards enhanced interaction with cellulosic fibers

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Journal of bioresources and bioproducts 2017年第1期2卷 36-44页

作者： Ting Li Jun Fan Jie Qi Lina Liu Limei Li Xueren Qian Qingwen Wang Yonghao Ni Jing Shen Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry UniversityHarbin 150040China College of Materials and Energy South China Agricultural UniversityGuangzhou 510642China Department of Chemical Engineering&Limerick Pulp and Paper Centre University of New BrunswickFredericton E3B 5A3Canada Hangzhou Research Institute of Chemical Technology Co. Ltd.Hangzhou 310014China

Interaction of unmodified starch with guest molecules or ligands(e.g.,fatty acids)as a basis for the formation of starch-encapsulated mineral filler particles is an effective process for mitigating the negative impact of filler addition on the strength properties of cellulosic *** unmodified starch is essentially nonionic,the interaction of starch-engineered fillers with negatively charged cellulosic fibers is somehow ***,the concept of substituting unmodified starch with a minor amount of cationic starch in filler engineering with starch inclusion complexes was *** was hypothesized that filler-fiber interaction would be enhanced by cationic-anionic ***,the effectiveness of this concept was demonstrated to be very *** instance,at a cationic starch percentage of 3%(relevant to the weight of total starch),filler retention and filler bondability with cellulosic fibers were significantly improved,leading to further mitigated negative impact of filler addition on tensile ***,this easily scalable concept may shed light on greener,more efficient use of filler technologies on the basis of starch inclusion complex formation,opening up new possibilities for real commercial applications.

关键词： Unmodified starch Cationic starch Starch inclusion complex Cellulosic networks Mineral fillers

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Effect of Starch/Polylactic Acid Ratio on the Interdependence of Two-Phase and the Properties of Composites

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Journal of Wuhan University of technology(materials science) 2015年第5期30卷 1108-1114页

作者：左迎峰 GU Jiyou CAO Jun WEI Shuangying TAN Haiyan 张彦华 Key Laboratory of Bio-Based Material Science and Technology Northeast Forestry University Ministry of Education College of Material Science & Engineering Central South University of Forestry & Technology

Starch/polylactic acid(PLA) composites were prepared by melt extrusion, with corn starch and PLA as raw materials, glycerol as the plasticizer. Effects of starch/PLA ratio on the interdependence of two-phase and other properties of the composites were studied. The combination of results of TGA with SEM indicated that the interdependence between starch and PLA was increased gradually as the starch/PLA ratio reduced. DSC results showed that the glass transition temperature(Tg), melting temperature(Tm) and degree of crystallinity of PLA in composites were increased gradually, whereas the cold crystallization temperature(Tc) was gradually decreased as the starch/PLA ratio reduced. The rheological properties of composites were closely related with the interdependence of two-phase, with reducing starch/PLA proportion, the interdependence was increased, and then the strain for storage modulus was firstl reduced and then gradually increased. Frequency scanning showed that the storage modulus and complex viscosity were decreased with reducing starch content. As the starch/PLA ratio reduced, the matrix phase PLA was increased, so that the strength of composites was increased gradually, whereas water absorption rate was decreased gradually.

关键词： corn starch polylactic acid mixing ratio interdependence of two-phase properties

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