Materials 2013, 6(10), 4284-4308; doi:10.3390/ma6104284
Article

A Hybrid Methacrylate-Sodium Carboxymethylcellulose Interpolyelectrolyte Complex: Rheometry and in Silico Disposition for Controlled Drug Release

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Received: 4 July 2013; in revised form: 13 August 2013 / Accepted: 16 August 2013 / Published: 26 September 2013
(This article belongs to the Special Issue Smart Polymers and Polymeric Structures)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: The rheological behavioral changes that occurred during the synthesis of an interpolyelectrolyte complex (IPEC) of methacrylate copolymer and sodium carboxymethylcellulose were assessed. These changes were compared with the rheological behavior of the individual polymers employing basic viscosity, yield stress, stress sweep, frequency sweep, temperature ramp as well as creep and recovery testing. The rheological studies demonstrated that the end-product of the complexation of low viscous methacrylate copolymer and entangled solution of sodium carboxymethylcellulose generated a polymer, which exhibited a solid-like behavior with a three-dimensional network. Additionally, the rheological profile of the sodium carboxymethylcellulose and methacrylate copolymer with respect to the effect of various concentrations of acetic acid on the synthesis of the IPEC was elucidated using molecular mechanics energy relationships (MMER) by exploring the spatial disposition of carboxymethylcellulose and methacrylate copolymer with respect to each other and acetic acid. The computational results corroborated well with the experimental in vitro drug release data. Results have shown that the IPEC may be suitable polymeric material for achieving controlled zero-order drug delivery.
Keywords: interpolyelectrolyte complex; eudragit; carboxymethylcellulose; rheology; hydrogel; molecular mechanics
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MDPI and ACS Style

Ngwuluka, N.C.; Choonara, Y.E.; Kumar, P.; Modi, G.; Toit, L.C.; Pillay, V. A Hybrid Methacrylate-Sodium Carboxymethylcellulose Interpolyelectrolyte Complex: Rheometry and in Silico Disposition for Controlled Drug Release. Materials 2013, 6, 4284-4308.

AMA Style

Ngwuluka NC, Choonara YE, Kumar P, Modi G, Toit LC, Pillay V. A Hybrid Methacrylate-Sodium Carboxymethylcellulose Interpolyelectrolyte Complex: Rheometry and in Silico Disposition for Controlled Drug Release. Materials. 2013; 6(10):4284-4308.

Chicago/Turabian Style

Ngwuluka, Ndidi C.; Choonara, Yahya E.; Kumar, Pradeep; Modi, Girish; Toit, Lisa C.; Pillay, Viness. 2013. "A Hybrid Methacrylate-Sodium Carboxymethylcellulose Interpolyelectrolyte Complex: Rheometry and in Silico Disposition for Controlled Drug Release." Materials 6, no. 10: 4284-4308.

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