Synthesis of Green Adhesive with Tannin Extracted from Eucalyptus Bark for Potential Use in Wood Composites  

作　　者：Medjda Amari Kamel Khimeche Abdelkader Hima Redouane Chebout Abderahmane Mezroua 

机构地区：[1]Ecole Militaire Polytechnique,Bordj El Bahri,16046,Algeria [2]Department of Electrical Engineering,Faculty of Technology,University of El Oued,El Oued,39000,Algeria [3]Centre in Analytical Chemistry and Physics,Algiers,16004,Algeria

出　　处：《Journal of Renewable Materials》2021年第3期463-475,共13页可再生材料杂志（英文）

基　　金：This work is supported by the Polytechnic military school(Ecole Militaire Polytechnique)Algeria,and the Centre in Analytical Chemistry and Physics(CRAPC)Algeria.

摘　　要：Recently,the exploitation of renewable plant resources in the formulation of adhesives is very promising for their availability at low coast,as well as their richness in biomolecules such as polyphenols.In this way,many research studies tannins extracted from different sources such as mimosa,quebracho,and pine have been the subject of very satisfactory recent studies.In this paper,a new complete characterization of the tannins extracted from the bark of eucalyptus globulus harvested from two regions in Algeria was achieved.The structural characterization enabled us to confirm the richness in condensed tannins,particularly in procyanidin and prodelphinidin units.The most reactive tannins obtained during extraction at 70℃(yield:27.1%)have a Stiasny number of 75.92%.This extract was used for the formulation of adhesives(tannin/hexamine).The thermal characterizaction of the adhesives showed higher stability for the tannin formulation of eucalyptus/hexamine as well as an excellent mechanical performance with a MOE of 2807 MPa at 180℃and shear strength of 689.4 N/mm^(2).

关 键 词：E.globulus TANNINS RESIN adhesives FTIR NMR 

分 类 号：TB3[一般工业技术—材料科学与工程]