AI Article Synopsis
- The study focused on creating cellulose nanocrystals (CNC) from medical cotton using various acids (sulfuric, hydrochloric, and phosphoric) for hydrolysis, resulting in different shapes and forms of CNC.
- CNC produced from sulfuric and hydrochloric acids had a fiber-like shape, while those from phosphoric acid had a spherical shape that decreased in size with longer hydrolysis times, ranging from 853 nm to 187 nm.
- X-ray Diffraction showed different crystalline structures in the CNCs based on the acid used, with sulfuric and hydrochloric yielding 91% crystallinity and phosphoric yielding between 43-60%, indicating that the hydrolysis medium significantly affects the
Article Abstract
In this study, medical cotton was subjected to acid hydrolysis in sulfuric, hydrochloric and phosphoric acid medium to prepare cellulose nanocrystals (CNC) with different morphologies and polymorphism. Morphology of the prepared CNC samples revealed fiber shaped morphology for sulfuric and hydrochloric acid hydrolyzed samples, whereas, spherical shaped for phosphoric acid hydrolyzed samples. The size of the spherical shaped CNC decreased with the increase of hydrolysis time, from 853 nm for 12 h to 187 nm for 48 h. X-ray Diffraction analysis showed that hydrochloric acid hydrolyzed CNC is cellulose I (CI), phosphoric acid hydrolyzed CNC is cellulose II (CII) and sulfuric acid hydrolyzed CNC contain both CI and CII. The crystallinity of sulfuric and hydrochloric acid hydrolysis samples was 91%, whereas, the crystallinity of phosphoric acid hydrolysis samples was between 43 and 60% depending on hydrolysis time. Thermal properties were also affected by the hydrolysis medium. Thus cellulose nanocrystals were prepared with different morphologies and physical characteristics through a facile method.
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| http://dx.doi.org/10.1016/j.ijbiomac.2019.03.027 | DOI Listing |
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