Chemical modification of cellulosic fibers for better convertibility in packaging applications

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• 作者：Sauli Vuoti^a ; ^{sauli.vuoti@vtt.fi} ; Elina Laatikainen^b ; Harri Heikkinen^c ; Leena-Sisko Johansson^d ; Erkki Saharinen^c ; Elias Retulainen^b
• 关键词：Cellulose modification ; Transparent paper ; Cellulose esterification ; Paper elongation ; Hydrophobicity
• 刊名：Carbohydrate Polymers
• 出版年：2013
• 出版时间：25 July, 2013
• 年：2013
• 卷：96
• 期：2
• 页码：549-559
• 全文大小：2470 K

文摘

Cellulose fiber has been modified by mechanical and chemical means in order to improve paper properties, which respond to moisture and temperature. When the cellulose is first refined and then etherified using hydroxypropylation under dry conditions, the paper sheets prepared from the hydroxypropylated cellulose show improved elongation. When the level of hydroxypropylation is high enough, the paper sheets also become transparent. Additionally, the effect of cellulose activation using different mechanical methods has been compared by esterification reactions. It is shown that removal of water is the most crucial step for the esterification reactions while other methods have a lesser impact. The paper sheets prepared from the esterified cellulose fibers show an increase in contact angles and high hydrophobicity.