Lignocellulosic Micro and Nanofibrillated Cellulose Produced by Steam Explosion for Wood Adhesive Formulations  

作　　者：Saad Nader Felipe Guzman Raphael Becar Cesar Segovia Cecilia Fuentealba Miguel Peirera Evelyne Mauret Nicolas Brosse 

机构地区：[1]Laboratoire d’Etude et de Recherches sur le Materiau Bois-Green Process For Wood(LERMaB-GP4W),Facultedes Sciences et Technologies,Universitede Lorraine,Vandœuvre-les-Nancy,France [2]Laboratoire de Genie des Procedes Papetiers(LGP2),Saint Martin D’Hères,France [3]Unidad de Desarrollo Tecnologico(UDT),Universidad de Concepcion,Coronel,Chile [4]Centre d’Essais TEchnique LORrain(CETELOR),Epinal,France

出　　处：《Journal of Renewable Materials》2022年第2期263-271,共9页可再生材料杂志（英文）

基　　金：The authors gratefully acknowledge the financial support of Labex Tec21 and Labex Arbre for the thesis funding.This work was also supported by the Franco-Chilean EcosSud Collaborative Program C18E05,ANID PIA/Apoyo CCTE AFB170007 of Universidad de Concepcion.

摘　　要：The reinforcing impact of Lignocellulosic micro and nanofibrillated cellulose(L-MNFCs)obtained from Eucalyp-tus Globulus bark in Urea-Formaldehyde UF adhesive was tested.L-MNFCs were prepared by an environmentally friendly,low-cost process using a combination process involving steam explosion followed by refining and ultra-fine grinding.Obtained L-MNFCs showed a web-like morphology with some aggregates and lignin nanodroplets.They present a mixture of residual fibers and fine elements with a width varying between 5 nm to 20μm,respec-tively.The effects of the addition of low amounts of L-MNFCs(1%wt.)on the properties of three different adhe-sives(Urea-Formaldehyde UF,Phenol-Formaldehyde PF,and Tannin-Hexamine TH)were studied by the evolution of the pH,the viscosity,and the mechanical properties.Results showed that the viscosity of PF and UF adhesives increased with the addition of L-MNFCs,unlike TH.Meanwhile,the addition led to better mechan-ical behavior for the three adhesives.Particleboards were then prepared using modified UF with L-MNFCs and tested.Results showed that an amount of 1%wt.of L-MNFCs was sufficient to increase the internal bonding by≈67%,the modulus of elasticity by≈43%,and the modulus of rupture by≈29%.

关 键 词：Lignocellulosic microfibrils Eucalyptus globulus bark wood adhesives steam explosion wood panels 

分 类 号：TQ332.4[化学工程—橡胶工业]