Dissolving Cellulose in a NaOH/Thiourea Aqueous Solution: A Topochemical Investigation

✍ Scribed by Lifeng Yan; Juan Chen; Prakriti R. Bangal

• Book ID: 102933743
• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 709 KB
• Volume: 7
• Category: Article
• ISSN: 1616-5187
• DOI: 10.1002/mabi.200700072

✦ Synopsis

Abstract

Various kinds of cellulose/cellulose‐aggregate films have been prepared on newly cleaved mica by the deposition of the suspensions of microcrystalline cellulose in water in the presence or in absence of NaOH/thiourea at different temperatures. The topochemistry of the cellulose surfaces have been directly observed by employing both SEM‐EDX and AFM. These studies show that both NaOH and thiourea have a homogeneous distribution around the cellulose fibers during the dissolving process, and it is believed that their synergic interactions play a key role to dissolve the cellulose aggregates. It is also found that the dissolving process is continuous while the ice state formation promotes the dissolving process.

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