AI Article Synopsis
- The cold alkaline treatment (mercerization) of cellulose is used in industry to enhance the material by removing hemicelluloses, leading to a structural transition from cellulose I to cellulose II.
- Cellulose II is characterized by an antiparallel arrangement of macromolecules, which is seen in both mercerized and regenerated cellulose, but the formation of this structure during mercerization is significantly complex.
- This paper examines theoretical challenges concerning the antiparallel structure of mercerized cellulose, compiling existing experimental findings to support the discussion.
Article Abstract
The cold alkaline treatment or mercerization of cellulose is widely used in industry to enrich the cellulose raw with high-molecular-weight [Formula: see text]-cellulose. Washing out of hemicelluloses by alkalies is accompanied by the rearrangement of the cellulose chains' packing, well known as a transition between cellulose I and cellulose II. Cellulose II can also be produced by the precipitation of the cellulose solutions (regeneration). The currently accepted theory implies that in cellulose II, both mercerized and regenerated, the macromolecules are arranged antiparallelly. However, forming such a structure in the course of the mercerization seems to be significantly hindered, while it seems to be quite possible in the regeneration process. In this work, we discuss the sticking points in the theory on the antiparallel structure of mercerized cellulose from a theoretical point of view summarizing all of the available experimental data in the field.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8062695 | PMC |
| http://dx.doi.org/10.1038/s41598-021-88040-x | DOI Listing |
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