Open AccessLIQUID CRYSTALLINE PROPERTIES OF HYDROXYPROPYL CELLULOSE PREPARED FROM DISSOLVED EGYPTIAN BAGASSE PULP
Author(s) -
E Abou-Zeid Ragab,
Nahla A. El-Wakil,
Ahmed A. El-Gendy,
Yehia Fahmy,
Alain Dufresne
Publication year - 2021
Publication title -
cellulose chemistry and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.302
H-Index - 32
eISSN - 2457-9459
pISSN - 0576-9787
DOI - 10.35812/cellulosechemtechnol.2021.55.02
Subject(s) - cellulose , differential scanning calorimetry , chemistry , hydroxypropyl cellulose , fourier transform infrared spectroscopy , pulp (tooth) , chemical engineering , lyotropic , glass transition , regenerated cellulose , organic chemistry , polymer chemistry , nuclear chemistry , liquid crystalline , polymer , medicine , physics , pathology , engineering , thermodynamics
"Egyptian agricultural wastes were used for preparing advanced cellulosic derivatives possessing liquid crystallineproperties. Cellulose was successfully isolated in pure form from Egyptian bagasse pulp. Hydroxypropylation wascarried out on the obtained cellulose and the liquid crystalline properties were investigated. The preparedhydroxypropyl cellulose (HPC) was esterified with 4-alkyloxybenzoic acids, giving products with liquid crystallineproperties. The molecular structure of HPC and a series of its esters – 4-alkoxybenzoloxypropyl cellulose (ABPC-m) –was confirmed by Fourier transform infrared (FT-IR) and 1H NMR spectroscopy. The liquid crystalline (LC) phasesand transition behaviors were investigated using differential scanning calorimetry (DSC) and polarized lightmicroscopy (PLM). The lyotropic behavior in dimethyl acetamide (DMA) was investigated using an Abeerefractometer, and the critical concentration was determined by measuring the refractive index of the solutions inDMA."