Institute of Chemical Industry of Forestry Products

Nanjing, China

Institute of Chemical Industry of Forestry Products

Nanjing, China

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Lin Y.,Institute of Chemical Industry of Forestry Products | Fang G.-G.,Institute of Chemical Industry of Forestry Products
Chemistry and Industry of Forest Products | Year: 2016

Glucose, as the template compound, was modified by glycidyl methacrylate and copolymerized with acrylic acid and acrylamide. After freeze drying, the pH-sensitive glulose-based hydrogels were obtained. The experimental conditions were studied and the optimal conditions were the 1:4:4 mass ratio of glucose/acrylic acid/acrylic amide, the 0.5% dosage of cross-linking agent, initiator and reaction temperature at 65℃. And the swelling ratio of hydrogel obtained under these conditions was about 90.5 g/g. Additionally, it was found that the swelling ratio of the glulose-based hydrogel increased with time extension and finally approached equilibrium in certain pH medium. And the swelling ratio of the hydrogels in the intestinal fluid without enzymes (pH=7.4) was significantly higher than that in the gastric fluid without enzymes (pH=1.2). Moreover, the hydrogels could keep basically no degradation in the two kinds of medium. This showed certain application prospect in tissue engineering materials. © 2016, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.


Liu H.,Institute of Chemical Industry of Forestry Products | Liu H.,National Engineering Laboratory for Biomass Chemical Utilization | Song J.,University of Michigan-Flint | Shang S.,Institute of Chemical Industry of Forestry Products | And 5 more authors.
ACS Applied Materials and Interfaces | Year: 2012

Developing bionanocomposites from renewable biomass is a viable supplement for materials produced from mineral and fossil fuel resources. In this study, nanocomposites composed of carboxylated cellulose nanocrystals (CCNs) and silver nanoparticles (AgNPs) were prepared and used as bifunctional nanofillers to improve the mechanical and antimicrobial properties of waterborne polyurethane (WPU). Morphology, structure and performance of the CCNs/AgNPs nanocomposites and WPU-based films were investigated. WPU-based composite films were homogeneous and reinforced. The WPU/CCNs/AgNPs composite showed excellent antimicrobial properties in killing both Gram-negative E. coli and Gram-positive S. aureus. The CCNs/AgNPs nanocomposites could be applied as bifunctional nanofillers within WPU. © 2012 American Chemical Society.


Kantarelis E.,KTH Royal Institute of Technology | Liu J.,Institute of Chemical Industry of Forestry Products | Yang W.,KTH Royal Institute of Technology | Blasiak W.,KTH Royal Institute of Technology
Energy and Fuels | Year: 2010

Bamboo is an abundant plant in many Asian countries and especially in China; it has an extremely rapid growing rate, and it can be considered as a sustainable wood resource. In this paper, a comparative study of pyrolysis of bamboo in the presence of high-temperature steam and an inert atmosphere (N 2) as well as characterization of products has been conducted. Evaluation of experimental results showed that faster devolatilization can be achieved in the presence of high-temperature steam. Furthermore, the gas composition indicates interaction of steam with vapors and solid species even at low temperatures. Analysis of the obtained liquid after steam pyrolysis at 797 K revealed that the H/C and O/C ratios in the liquid are 1.54 and 0.16, respectively. The characteristics of the products indicate possible exploitation of derived char as an activated carbon precursor, a reducing agent in metallurgical processes, or a solid fuel for gasification and combustion processes. The composition of the liquid fraction suggests further exploitation as a liquid fuel and/or chemical feedstock. © 2010 American Chemical Society.


Shang Q.,Institute of Chemical Industry of Forestry Products | Zhou Y.,Institute of Chemical Industry of Forestry Products | Xiao G.,Nanjing Southeast University
Journal of Coatings Technology Research | Year: 2014

The present article reports on a simple and convenient method for the fabrication of superhydrophobic surfaces based on silica particles by spraying the as-prepared silica suspension containing silica sol and silica microspheres on the substrate. The morphologies of the silica particulate coatings could be controlled by varying the silica microsphere concentration. The silica particulate coatings as prepared were exceptionally rough and superhydrophilic, with water contact angles less than 5°. The surface silanol groups of the hydrophilic coatings could be functionalized using 1H,1H,2H,2H- perfluorodecyltriethoxysilane to form hydrophobic groups. The resulting surface showed excellent superhydrophobic property with water contact angle up to 165.6 ± 0.9° and sliding angle of 3.5 ± 0.4°. In addition, the superhydrophobicity of the coating possessed a good stability after 3 months of exposure in air for a wide range of pH values. © 2014 American Coatings Association.


Xu J.,Institute of Chemical Industry of Forestry Products | Xu J.,National Engineering Laboratory for Biomass Chemical Utilization | Jiang J.,Institute of Chemical Industry of Forestry Products | Jiang J.,National Engineering Laboratory for Biomass Chemical Utilization | And 2 more authors.
Green Chemistry | Year: 2012

The objective of this investigation was to find a simple method for the production of phenolic rich products and sugar derivatives (biopolyols) via separation of liquefied lingocellulosic materials. Liquefaction of lignocellulosic materials was conducted in methanol at 180 °C for 15 min with the conversion of raw materials at about 75%. After liquefaction, the liquefied products were separated by addition of a sufficient amount of water. It was found that the hydrophobic phenolics could be largely separated from aqueous solutions. The phenolic products that precipitated from the aqueous phase were mainly composed of phenolic derivatives such as 2-methoxy-4-propyl- phenol and 4-hydroxy-3-methoxy-benzoic acid methyl ester. Afterwards, the aqueous solution was distilled under vacuum to remove water and formed a viscous liquid product henceforth termed biopolyol. As evidenced by GC-MS analysis, the biopolyols contained methyl sugar derivatives, including methyl β-d-mannofuranoside, methyl α-d-galactopyranoside, methyl α-d-glucopyranoside, and methyl β-d-glucopyranoside. The effect of glycerol on promotion of the liquefaction reaction was also studied. The yield of residue was significantly decreased from approximately 25 to 12% when a glycerol-methanol mixture was used as solvent rather than methanol. According to the GC-MS analysis, the total content of phenolics and poly-hydroxy compounds (including glycerol and sugar derivatives) in phenolic products and biopolyols was 65.9 and 84.9%, respectively. Therefore, a new method for fractionation of liquefied products was proposed according to the molecular structure of the biomass. © 2012 The Royal Society of Chemistry.


Chen Y.,Institute of Chemical Industry of Forestry Products | Chen Y.,Nanjing University | Zheng X.,Nanjing University | Wang X.,Nanjing University | And 3 more authors.
ACS Macro Letters | Year: 2014

A facile synthesis of near-infrared (NIR) luminescent gold cluster-poly(acrylic acid) (PAA) hybrid nanogels was developed by in situ reduction of gold salt in the core-hollow and shell-porous PAA nanogels. These Au-PAA nanogels exhibited excellent near-infrared photoluminescence properties and showed targeting potential in the optical imaging of the living body. © 2013 American Chemical Society.


Huang K.,Institute of Chemical Industry of Forestry Products | Huang K.,Beijing Institute of Technology | Zhang Y.,Institute of Chemical Industry of Forestry Products | Li M.,Institute of Chemical Industry of Forestry Products | And 4 more authors.
Progress in Organic Coatings | Year: 2012

A light color cardanol-based epoxy curing agent (MBCBE) was synthesized from cardanol butyl ether, formaldehyde and diethylenetriamine. In comparison, a phenalkamine with a similar structure was also prepared. The chemical structures were confirmed by GC-MS and FTIR. The cure behaviors of diglycidyl ether of bisphenol A (DGEBA) with these two curing agents was studied by differential scanning calorimetry (DSC). The morphology, mechanical properties, thermal properties of the cured epoxies were also investigated. The DSC results indicated that MBCBE is less reactive than the phenalkamine. The morphology of the cured MBCBE/DGEBA consisted of cavities dispersed within a continuous epoxy matrix. The cavities markedly improved the lap shear strength and impact strength of the cured resin. Both the two cured resins indicated a two-stage decomposition mechanism. Compared with PKA/DGEBA, the weight loss of MBCBE/DGEBA at the first stage was mainly resulted from the dispersed phase in the epoxy matrix. © 2012 Elsevier B.V.


Huang K.,Institute of Chemical Industry of Forestry Products | Zhang P.,Washington State University | Zhang J.,Washington State University | Li S.,Institute of Chemical Industry of Forestry Products | And 3 more authors.
Green Chemistry | Year: 2013

In this work, a 21-carbon dicarboxylic acid (C21DA) and a 22-carbon tricarboxylic acid (C22TA) were prepared by the Diels-Alder addition of tung oil fatty acids with acrylic acid and fumaric acid, respectively, and subsequently converted to the corresponding di- and triglycidyl esters. There were no solvents used in the addition and glycidylation reactions. The excess epichlorohydrin used in the latter reaction could be recovered and reused. Furthermore, for the first time, calcium oxide was introduced as a water scavenger in the glycidylation process to effectively avoid the side reactions. The chemical structures of the products were confirmed using 1H NMR, 13C NMR and ESI-MS analyses. The curing behaviors of the di- and triglycidyl esters were studied using differential scanning calorimetry. Flexural, impact and dynamic mechanical properties of the cured resins were also determined. A commercial bisphenol A epoxy DER 332 and an epoxidized soybean oil (ESO) were used as controls in the study. Results indicated that the obtained diglycidyl and triglycidyl esters had overall superior performance to that of ESO for epoxy applications. Particularly, the triglycidyl ester of the C22TA displayed comparable strength, modulus and glass transition temperature to that of DER332. © 2013 The Royal Society of Chemistry.


Liu J.L.,Institute of Chemical Industry of Forestry Products | Jiang J.C.,Institute of Chemical Industry of Forestry Products | Huang H.T.,Institute of Chemical Industry of Forestry Products
Advanced Materials Research | Year: 2013

Willow is an abundant plant in many countries all over the world. It has an extremely rapid growing rate, and it can be considered as a sustainable raw material wood resource. In this study, H3PO4 of catalyzed willow pyrolysis was investigated by means of CP-GC-MS. Moreover pyrolysis products such as furfural, levoglucosenone,levoglucosan and phenolic compounds was ananlyzed. The results indicate that H3PO4 shows increased selectivity towards sugar and furan compounds at the expense of acetic acid and phenolic compounds. The biomass treatment with H3PO4 enhances dehydration and decarbonylation of levoglucosan resulting in more furfural and levoglucosenone, promoting the lignin to form carbon rather than phenolic compounds. and inhibit acetic acid formation. The content of the major sugar compounds reached 50% in the prensence of catalyst. The content of the major furan compounds enhanced, mainly furfural. © (2013) Trans Tech Publications, Switzerland.


Xin J.,Washington State University | Zhang P.,Washington State University | Huang K.,Washington State University | Huang K.,Institute of Chemical Industry of Forestry Products | Zhang J.,Washington State University
RSC Advances | Year: 2014

An epoxy based on cinnamic acid (Cin-epoxy) and an anhydride curing agent based on dipentene were prepared. Both products are liquids of low viscosity at room temperature. For the synthesis of the epoxy, cinnamic acid was first converted to a diacid by reacting with maleic anhydride via Friedel-Crafts reaction, followed by allylation of the carboxylic groups and subsequent epoxidation of the allyl double bonds. The curing agent was the Diels-Alder adduct of dipentene and maleic anhydride (DPMA). The chemical structures of Cin-epoxy and DPMA were confirmed by 1H NMR, 13C NMR, FT-IR and ESI-MS. Non-isothermal curing of Cin-epoxy was studied using differential scanning calorimetry (DSC). In addition to DPMA, two commercial anhydrides were also used to cure Cin-epoxy and the curing reactivity and properties of cured resins were compared. Thermal mechanical properties and thermal stability of the cured epoxy resins were studied using dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA), respectively. Results showed that Cin-epoxy was slightly more reactive than the bisphenol A type epoxy DER 332 and displayed good dynamic mechanical properties and thermal stability. This journal is © The Royal Society of Chemistry.

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