Nanofiber Formation of Hydroxylpropylcellulose (HPC)

✍ Scribed by Lifeng Yan; Wei Lin; Prakriti R. Bangal

• Book ID: 102470863
• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 435 KB
• Volume: 6
• Category: Article
• ISSN: 1616-5187
• DOI: 10.1002/mabi.200600067

✦ Synopsis

Abstract

Summary: The aggregative behaviors of hydroxypropylcellulose (HPC) molecules in aqueous solution and on substrates have been observed by employing laser light scattering (LLS) and, after deposition on a mica surface, atomic force microscopy (AFM). LLS studies showed that the HPC molecules formed large aggregates through self‐association when the concentration of the solution was above the critical concentration c~t~. AFM measurements revealed that when a dilute aqueous solution of HPC molecules was deposited onto a mica substrate at a temperature below its lower critical solution temperature (LCST) thin nanofibers were formed with a height of 0.9 nm, whereas thick nanofibers were formed when an aqueous solution of HPC molecules was deposited onto a substrate above its LCST. Furthermore, the growth of nanofibers led to the formation of fan structures.

AFM image of the HPC fan‐like structures on the surface of mica.

magnified imageAFM image of the HPC fan‐like structures on the surface of mica.