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Title of Journal: Cellulose

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Abbravation: Cellulose

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Springer Netherlands

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DOI

10.1007/bf00883386

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1572-882X

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Properties of cellulose films prepared from NaOH/u

Authors: Quanling Yang Xingzhen Qin Lina Zhang
Publish Date: 2011/02/18
Volume: 18, Issue: 3, Pages: 681-688
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Abstract

Cellulose films were successfully prepared from NaOH/urea/zincate aqueous solution precooled to −13 °C by coagulating with 5 H2SO4 The cellulose solution and regenerated cellulose films were characterized with dynamic rheology ultraviolet–visible spectroscope scanning electron microscopy wide angle Xray diffraction Fourier transform infrared FTIR spectrometer thermogravimetry and tensile testing The results indicated that at higher temperature above 65 °C or lower temperature below −10 °C or for longer storage time gels could form in the cellulose dope However the cellulose solution remained a liquid state for a long time at 0–10 °C Moreover there was an irreversible gelation in the cellulose solution system The films with cellulose II exhibited better optical transmittance high thermal stability and tensile strength than that prepared by NaOH/urea aqueous solution without zincate Therefore the addition of zincate in the NaOH/urea aqueous system could enhance the cellulose solubility and improve the structure and properties of the regenerated cellulose films

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