TY - JOUR
T1 - Novel regenerated cellulose films prepared by coagulating with water
T2 - Structure and properties
AU - Li, Ran
AU - Zhang, Lina
AU - Xu, Min
PY - 2012/1/4
Y1 - 2012/1/4
N2 - Regenerated films were successfully prepared from cellulose/NaOH/urea solution by coagulating with water at temperature from 25 to 45 °C. The results of solid 13C NMR, wide angle X-ray diffraction, scanning electron microscopy (SEM) and tensile testing revealed that the cellulose films possessed homogeneous structure and cellulose II crystalline, similar to that prepared previously by coagulating with 5 wt% H2SO4. By changing the coagulation temperature from 25 to 45 °C, tensile strength of the films was in the range of 85-139 MPa. Interestingly, the RC35 film coagulated at 35 °C exhibited the highest tensile strength (σb = 139 MPa). The inclusion complex associated with cellulose, NaOH and urea hydrates in the cellulose solution were broken by adding water (non-solvent), leading to the self-association of cellulose to regenerate through rearrangement of the hydrogen bonds. This work provided low-cost and "green" pathway to prepare cellulose films, which is important in industry.
AB - Regenerated films were successfully prepared from cellulose/NaOH/urea solution by coagulating with water at temperature from 25 to 45 °C. The results of solid 13C NMR, wide angle X-ray diffraction, scanning electron microscopy (SEM) and tensile testing revealed that the cellulose films possessed homogeneous structure and cellulose II crystalline, similar to that prepared previously by coagulating with 5 wt% H2SO4. By changing the coagulation temperature from 25 to 45 °C, tensile strength of the films was in the range of 85-139 MPa. Interestingly, the RC35 film coagulated at 35 °C exhibited the highest tensile strength (σb = 139 MPa). The inclusion complex associated with cellulose, NaOH and urea hydrates in the cellulose solution were broken by adding water (non-solvent), leading to the self-association of cellulose to regenerate through rearrangement of the hydrogen bonds. This work provided low-cost and "green" pathway to prepare cellulose films, which is important in industry.
KW - "Green" pathway and low cost
KW - Cellulose film
KW - Coagulant of water
KW - NaOH/urea aqueous solution
KW - Packaging material
UR - https://www.scopus.com/pages/publications/81155161023
U2 - 10.1016/j.carbpol.2011.07.023
DO - 10.1016/j.carbpol.2011.07.023
M3 - 文章
AN - SCOPUS:81155161023
SN - 0144-8617
VL - 87
SP - 95
EP - 100
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
IS - 1
ER -