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Yuan J.-J.,Key and Open Laboratory of Forest Chemical Engineering | Ye J.-Z.,Key and Open Laboratory of Forest Chemical Engineering | Wang C.-Z.,Key and Open Laboratory of Forest Chemical Engineering | Wang C.-Z.,Beijing Institute of Technology | Lu L.,Hubei Academy of Forestry
Chemistry and Industry of Forest Products | Year: 2015

Chemical syntheses of hydroxytyrosol from different materials were investigated. Its disadvantages included long route, the low yield of product, and expensive catalyst as well as toxic reactants, etc.. This paper emphatically summarized biological synthetic routes for hydroxytyrosol with oleuropein and tyrosol. Furthermore, the syntheses and biological activities of hydroxytyrosol alkyl ether, lipophilic fatty acid ester, and glucoside derivatives, and structure-activity relationship were introduced. It is important to further study the syntheses of hydroxytyrosol and derivatives, and exploit new medicine of anti-tumor, anticancer, cardiovascular and cerebrovascular diseases. ©, 2015, Edited & Published by Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.


Chen H.,CAF Institute of Chemical Industry of Forest Products | Chen H.,Key and Open Laboratory of Forest Chemical Engineering | Wang C.,CAF Institute of Chemical Industry of Forest Products | Wang C.,Key and Open Laboratory of Forest Chemical Engineering | And 6 more authors.
Natural Product Research | Year: 2012

Phenethyl isothiocyanate (PEITC) was obtained from horseradish. The preparation procedure was as follows: the horseradish powder was hydrolysed in the water first, and then, after filtration, the residue was extracted by petroleum ether; finally, PEITC was isolated by silica gel column. The structure of PEITC was identified by IR, MS, 1H-NMR and 13C-NMR chromatography methods. The inhibitory activities of PEITC against Gibberella zeae, Xanthomonas axonopodis pv. citri, Cytospora sp. and Phytophthora capsisi showed that PEITC had good inhibition effects. The EC 50 values of G. zeae, X. axonopodis pv. citri, Cytospora sp. and P. capsisi were 13.92, 1.20, 0.73 and 3.69 μg mL -1, respectively. © 2012 Taylor & Francis.


Huang K.,CAF Institute of Chemical Industry of Forest Products | Xia J.-L.,CAF Institute of Chemical Industry of Forest Products | Xia J.-L.,Key and Open Laboratory of Forest Chemical Engineering | Ding H.-Y.,CAF Institute of Chemical Industry of Forest Products | Li M.,CAF Institute of Chemical Industry of Forest Products
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2010

Sucrose polyether polyol (SPEPO) grafted with C12-14 alkyl glycidyl ether (1214GE) copolymers (SPEPO-g-1214GE), as a compatibilizer for epoxy-asphalt composites cured by 4, 4-diphenylmethane (DDM), was synthesized and characterized by Fourier transform infrared spectrum(FT-IR), nuclear magnetic resonance spectrum (1H-NMR and 13C-NMR). And the compatibilization in epoxy-asphalt blends of these copolymers were studied. According to the Nielson model, DMA results indicate that SPEPO-g-1214GE increases the thickness of the interface between epoxy matrix and the asphalt phase. The modulus of the composites enhances 20% compared to the composites in which no compatibilization is added. Tensile strength and impact strength of the blends presented for SPEPO-g-1214GE are higher than that of the blends in which no compatibilizer is attempted. The blend with 4% SPEPO-g-1214GE results in the best performance in tensile strength and impact strength. Scanning electron microscope (SEM) reveals that higher content of SPEPO-g-1214GE in the epoxy asphalt composite results in smaller phase size of the blends corresponding to the samples containing 0%~4% SPEPO-g-1214GE.


Yu W.-J.,Key and Open Laboratory of Forest Chemical Engineering | Ying H.,Key and Open Laboratory of Forest Chemical Engineering | Wang Y.-J.,Key and Open Laboratory of Forest Chemical Engineering | Sun N.,Key and Open Laboratory of Forest Chemical Engineering
Reneng Dongli Gongcheng/Journal of Engineering for Thermal Energy and Power | Year: 2015

The CO2 catalytic gasification of pine sawdust was studied by fixed-bed reactors and thermal gravimetric analysis. The results showed that: (1) Increasing the temperature and adding CaCO3 and K2CO3 catalyst helped increasing gas production, reducing the yield of liquid and solid production; but when the temperature reached 950 ℃, the trend of gas production gradually weakened, instead, the liquid yield slightly increased and the production of solid slowly decreased. The gas was mainly composed of CO and CO2, followed by H2 and CH4, and other gases such as C2H6, C2H4 and C2H2, but the content was low. (2) Increasing the temperature and adding CaCO3 catalyst was benefit for tar cracking and reducing the component of tar, however, adding K2CO3 catalyst increased the component of tar. (3) Adding CaCO3 catalyst, the solid product has not been seriously damaged, but the surface of the solid product containing more CaCO3, formation of the active centers, promoting the reaction of CO2 with pine sawdust. Adding K2CO3, the solid product was significantly damaged, K2CO3 infiltration to pine sawdust in catalytic, with C forming KCK intercalated structure, promoting pine sawdust and CO2 response. ©, 2015, Harbin Research Institute. All right reserved.


Hu L.-F.,Key and Open Laboratory of Forest Chemical Engineering | Gao S.-S.,Key and Open Laboratory of Forest Chemical Engineering | Zhao L.-W.,Key and Open Laboratory of Forest Chemical Engineering | Wang C.-P.,Key and Open Laboratory of Forest Chemical Engineering | And 2 more authors.
Chemistry and Industry of Forest Products | Year: 2015

The hydroxymethylated straw ethanol residue (HER) was prepared from the hydroxymethylation of straw ethanol residue (ER). HER and urea-formaldehyde resin (UF) were then blended to fabricate the HER/UF and the preparation conditions were studied. Lignin in ER and HER were characterized by FT-IR and the dispersibilities of ER and HER in UF were analyzed by SEM. The results showed that the content of hydroxymethyl group in HER was more than that in ER. The increment of hydroxymethyl group in HER decreased with the ER dosage (the mass ratio of ER to formaldehyde) increasing. And HER showed better dispersity compared with ER in the UF resin. The HER prepared under the conditions of 2000% ER dosage and 0.9% NaOH dosage (the mass ratio of NaOH to HER) had the best performance. Its free formaldehyde was 0.24% and the viscosity was 3200 mPa·s. When 10%-40% UF resin was replaced by HER, formaldehyde emission of the three-ply boards could meet E0 grade and its bonding strength could meet the requirement of type II plywood. And the three-ply board that made by 30% HER/UF had the best performance. © 2015, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.


Lin Y.,Key and Open Laboratory of Forest Chemical Engineering | Fang G.-G.,Key and Open Laboratory of Forest Chemical Engineering | Huo D.,Key and Open Laboratory of Forest Chemical Engineering
Chemistry and Industry of Forest Products | Year: 2015

As a kind of biological polysaccharide, dextran contains many free hydroxyl groups on the main chain, which is convenient for modification and crosslinking. The hydrogels prepared by dextran exhibited excellent swelling property, biocompatibility and biodegradability. Dextran is widely applied in the fields of substance separation, drug delivery and tissue engineering. Kinds of common preparation methods of dextran-based hydrogels, including repeated freezing-thawing method, chemical crosslinking method, grafting modification method, and free radical polymerization, have been summarized, Besides, the applications of dextran-based hydrogels in recent years are reviewed and the future developments are discussed in present study. © 2015, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.


Cui H.-H.,Key and Open Laboratory of Forest Chemical Engineering | Fang G.-G.,Key and Open Laboratory of Forest Chemical Engineering
Chemistry and Industry of Forest Products | Year: 2015

The identification of eucalyptus and acacia wood and classification among six kinds of wood were studied in this paper, based on near-infrared spectroscopy method combined with chemometrics algorithm. Firstly, near-infrared spectra of 86 samples, containing Eucalyptus urophylla×E. grondis, E. urophylla L11, E. urophylla U6, E. globules, Acacia mangium and A. crassicarpa. were collected, Then partial least squares discriminant analysis (PLS-DA) was used to establish a classification model of eucalyptus and acacia. The results showed that the regression lines between predicted value and actual value of calibration set and validation set were in good agreement, and the coefficient of determination (R2) were 0.99 and 0.97. This showed that the model was better. Moreover, the accuracy of the unknown samples was 100%. MSC and Savitzky-Golay smoothing method were used to pretreat the spectral of 4000-7500 cm-1, and discrimination model was established based on the principal component analysis (PCA). Results showed that the recognition rate of the calibration and validation model was 100%. Therefore, the chemometrics algorithm based on near infrared spectra could identify the eucalyptus and acacia species quickly. © 2015, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.


Liao S.-L.,Key and Open Laboratory of Forest Chemical Engineering | Shang S.-B.,Key and Open Laboratory of Forest Chemical Engineering | Si H.-Y.,Key and Open Laboratory of Forest Chemical Engineering | Shen M.-G.,Key and Open Laboratory of Forest Chemical Engineering | And 2 more authors.
Chemistry and Industry of Forest Products | Year: 2015

Myrtanol was prepared via hydroboration-oxidation reaction from β-pinene, then eight novel carboxylic myrtanyl esters (myrtanyl acetate (4a), myrtanyl propionate (4b), myrtanyl butyrate (4c), myrtanyl valerate (4d), myrtanyl cyclohexanecarboxylate (4e), myrtanyl benzoate (4f), myrtanyl p-methylbenzoate (4g) and myrtanyl p-methoxybenzoate (4h) were obtained through the reaction of myrtanol and carboxylic acids using N,N'-dicyclohexylcarbodiimide/dimethylaminopyridine (DCC/DMAP) as catalyst. Structure characterizations were achieved by FT-IR, 1H NMR and ESI-MS. Antibacterial activity assays were carried out by agar dilution method. The results showed that compounds 4b, 4c, 4f, 4g and 4h exhibited inhibitory activities (MIC was 256 mg/L) against the Gram positive bacterial Staphylococcus aureus, and compounds 4a, 4b, 4c and 4e exhibited inhibitory activities (MICs were ranged from 128 to 256 mg/L) against the Gram negative bacterial Escherichia coli. more importantly. Compound 4a showed comparable activity (MIC was 128 mg/L) to that of bromogeramine against E. coli. Comparing with the starting compound β-pinene and the intermediate myrtanol, this series of esters showed better antibacterial activities. © 2015, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.


Xie Z.-H.,Key and Open Laboratory of Forest Chemical Engineering | Jin L.-W.,Key and Open Laboratory of Forest Chemical Engineering | Jin L.-W.,Beijing Institute of Technology
Chemistry and Industry of Forest Products | Year: 2014

Composites of acetylated wood flour (AWF)/low-density polyethylene (LDPE) were prepared by extrusion-injection molding process, and cardanol acetate (CA) and epoxy cardanol acetate (ECA) were added respectively. Properties such as tensile strength and hydrophobic as well as surface energy, migration of plasticizers and thermal mechanical properties (TMA) were studied. The results showed that the tensile strength of composites decreased with the increasing content of plasticizers, but tensile strength of all composites with CA were higher than that of composites with ECA. Composites with 5% plasticizers showed similar hydrophobicity, but composites with 15% CA was more hydrophobic, and contact angle test showed the similar results. The migration test of plasticizers revealed ECA had lower transfer constant (4.35×10-4) than that of CA (5.48×10-4) at 85℃ in 100 min, and ECA retained more in the composites after 3 700 min. The result of TMA exhibited the inflation of composites intensified with increasing temperature, and composites with 15% ECA showed higher coefficient of linear expansion (3 758 μm/(m·℃)) than that of composites with CA (3 182 μm/(m·℃)). ©, 2014, Editorial Board of "Chemistry and Industry of Forest Products". All right reserved.


Xie Z.-H.,Key and Open Laboratory of Forest Chemical Engineering | Zhang M.-M.,Key and Open Laboratory of Forest Chemical Engineering | Jin L.-W.,Key and Open Laboratory of Forest Chemical Engineering | Jin L.-W.,Beijing Institute of Technology
Chemistry and Industry of Forest Products | Year: 2015

Blends of wood fluor (WF), acetylation wood flour (AWF) with low density polyethylene (LDPE) and polylactic acid (PLA) were produced by twin-screw extruding and injection molding, respectively. Hydrophobicity, rheology, mechanical properties, and morphology of the composites were measured by moisture absorption, contact angle measurement, rotational rheometer, tensile tests and scanning electrical microscope (SEM), respectively. The results showed blending composites of AWF had better hydrophobic performance, and its moisture absorption reduced significantly compared with blending composites of WF. The moisture absorption decreased with the decrease of AWF content in composites, and the contact angle increased. Compared with WF/LDPE composites, AWF/LDPE composites had less viscosity and storage modulus. The viscosity and storage modulus of AWF/LDPE composites decreased with the decrease of AWF. The tensile strength of AWF blend composites was lower than that of WF blend composites, but the elongation at break showed a substantial increase. The results of SEM showed that the compatibility between AWF and plastic matrix was improved, and they adhered and blended more closely. ©, 2015, Editorial Board of Chemistry and Industry of Forest Products. All right reserved.

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