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›› 2013, Vol. 33 ›› Issue (1): 1-7.doi: 10.3969/j.issn.0253-2417.2013.01.001

• 1研究报告 •     Next Articles

Preparation and Characterization of Graft Modified Poplar Wood Powder by 4,4'-Methylenebis (Phenyl Isocyanate)/γ-Aminopropyltriethoxysilane

CHEN Jian, KONG Zhen-wu, JIAO Jian, FANG Gui-gan, WU Guo-min, HUO Shu-ping   

  1. Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab. for Biomass Chemical Utilization;Key and Open Lab. of Forest Chemical Engineering, SFA;Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China
  • Received:2012-03-14 Revised:1900-01-01 Online:2013-02-28 Published:2013-02-28

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Abstract: The poplar wood powder (PWP) was surface modified by 4,4'-methylenebis (phenyl isocyanate)/γ-aminopropyltriethoxysilane(MDI/KH550) in N,N-dimethylformamide (DMF). The effects of material ratio, reaction temperature, reaction time and dosage of catalyst on the reaction were investigated. The chemical structure and surface properties of modified poplar wood powder were characterized by contact angle measurement, elemental analysis, FT-IR, 13C CP-MAS NMR and SEM. The results showed that the weight percent gain (W) of MDI/KH550 modified PWP increased by 40-60% when MDI reacted with PWP in molar ratio of 2:1 at 120 ℃ for 2 h, and the catalyst had no appreciable effect on the modification reaction. The hydrophobicity of modified PWP was improved.

Key words: 4'-methylenebis(phenyl isocyanate), γ-aminopropyltriethoxysilane, poplar wood powder, surface modification

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