Optimization of wood flour acetylation by factorial design and partial least squares regression

Abstract

Recebido em 5/1/12; aceito em 17/5/12; publicado na web em 24/8/12Acetylation was performed to reduce the polarity of wood and increase its compatibility with polymer matrices for the production of composites. These reactions were performed first as a function of acetic acid and anhydride concentration in a mixture catalyzed by sulfuric acid. A concentration of 50%/50% (v/v) of acetic acid and anhydride was found to produced the highest conversion rate between the functional groups. After these reactions, the kinetics were investigated by varying times and temperatures using a 3 2 factorial design, and showed time was the most relevant parameter in determining the conversion of hydroxyl into carbonyl groups.

Ki̇myasal Modi̇fi̇kasyonun Odunda Su Alma, Boyutsal Kararlilik Ve Bi̇yoloji̇k Dayanima Etki̇si̇

“…C=O gerilimi (hemiselülozlardaki ksilanlar) nedeniyle ortaya çıkan 1710-1745 cm -1 absorpsiyon bandı, modifiye edilen örneklerde artmıştır. Karbonil pikindeki artış, modifikasyon işlemleri nedeniyle ester üretimine atfedilmiştir [34]. [11,35,36].…”