Nanocomposites from natural cellulose fibers incorporated with sucrose |
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Authors: | Tamer Y A Fahmy Fardous Mobarak Yehia Fahmy M H Fadl M El-Sakhawy |
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Institution: | (1) Cellulose and Paper Department, National Research Center, Sh. El-Tahrir, Dokki, Cairo, Egypt |
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Abstract: | The present work shows for the first time worldwide that sucrose can be easily placed by simple techniques within the micropores
or nanostructure of the mercerized non-dried cotton linter fibers to create a low-cost cellulose substitute. Such sucrose-containing
nanocomposites find suitable use as specialty absorbent paper. Relative to the sucrose-free paper, the sucrose-containing
counterparts exhibit greater breaking length and remarkably high water uptake (WRV) up to a sucrose content of 8–15% w/w.
Mercerization of cotton linters before incorporating them with sucrose greatly enhanced the retention of sucrose in the prepared
paper nanocomposites as compared to the case of unmercerized cotton linters. We assume that regions of the cell wall lamellae,
on both sides of the sucrose spacers, are stressed during drying because the sucrose spacers hinder them to relax. This leads
to a strain, which makes some microfibrils partially released and protrude out of the fiber. Thus, a sort of fiber beating
takes place. We called this phenomenon incorporation beating or encapsulation beating to differentiate it from chemical and mechanical beatings, and it explains the great increase in breaking length of the paper
nanocomposites prepared from the mercerized non-dried sucrose-loaded linters.
This article is dedicated to Professor Dr. Dr. h.c. mult. Walter Liese on the occasion of his 80th birthday. |
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