The controlled release of urea through mesoporous methylcellulose (MPMC) films with varying concentration of urea (10, 20, 40, and 50 wt%) was studied. It was found that the release of urea from methyl cellulose (MC) films take place through pores as well as through bulk of the MC matrix. The release of urea through MPMC film is independent of the initial concentration of urea. The mass of diffused urea is well fitted to the transport equations. The transport of urea is pseudo-Fickian. The optical study exhibits the compactness of the MC film at the high percentage of urea. © 2013 Copyright Taylor and Francis Group, LLC.

R P SINGH

K KUMARI

P P KUNDU

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Controlled Release of Urea Through Mesoporous Methylcellulose Films Derived From N, N Dimethyl Formamide

International Journal of Polymeric Materials and Polymeric Biomaterials

The rheological properties of methylcellulose in N,N-dimethylformamide (MC-DMF) gel are investigated to prepare extruded beads. The temperature scan under dynamic compression for various concentrations of MC in DMF is performed to investigate the rapture of MC gel at a constant frequency of 1 Hz. The morphological studies are performed using a scanning electron microscope (SEM) to analyze the size and shape of dried bead. However, during swelling studies, the MC beads have the capability to swell and retain a large amount of water > 9150% by weight and 9192.6% by volume. The mechanism of swelling is thermodynamically verified, where the enthalpy of hydration of initial layer of MC bead is negative. The newly defined electrostatic penta-pole model explains the anomalous behavior of urea release, where urea is assumed to be electrostatically bounded with the MC molecules. [Figure not available: see fulltext.]. © 2017, Springer-Verlag GmbH Germany, part of Springer Nature.

Rheologica Acta

Rheological and micro structural studies of methylcellulose solutions in N,N-dimethylformamide for preparation of extruded beads: controlled urea release

Polymer International

10.1002/pi.v60.1

The Journal of Chemical Physics

Nonequilibrium molecular dynamics simulation of transport and separation of gases in carbon nanopores. I. Basic results

Applied Physics Letters

Photoluminescence studies on porous silicon

Silicon quantum wire array fabrication by electrochemical and chemical dissolution of wafers

Sensors and Actuators A: Physical

Porous silicon morpbologies and formation mechanism

Controlled release of urea through mesoporous methylcellulose films derived from N, N dimethyl formamide

Journal	International Journal of Polymeric Materials and Polymeric Biomaterials
Publisher	TAYLOR & FRANCIS AS
ISSN	0091-4037