Silver rubber-hydrogel nanocomposite as pH-sensitive prepared by gamma radiation: Part I

Mohamed Mohamady Ghobashy,Ahmed M Elbarbary,A Awad,Mohamed A Elhady,Seth C Rasmussen

doi:10.1080/23312009.2017.1328770

Mohamed Mohamady Ghobashy, Ahmed M Elbarbary + Show 3 more

Open Access

https://doi.org/10.1080/23312009.2017.1328770

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Abstract

Silver rubber-hydrogel nanocomposite based on silver/styrene butadiene rubber/polyvinylpyrrolidone/methacrylic acid (SBR/PVP/MAA)/Ag was prepared by gamma radiation-induced crosslinking. During the radiation crosslinking of SBR/PVP/MAA solution containing silver nitrate AgNO3 (0.01 mol), in situ reduction of Ag+ ions was performed under the radiolysis of water. The properties of sliver rubber-hydrogel nanocomposite were investigated by FT-IR, XRD, TEM, SEM, DSC and TGA techniques. Transmission electron microscope (TEM) reveals that AgNPs have uniform distribution and spherical shape with mean diameter in the range of 8–10 nm. Differential scanning calorimetry (DSC) results of the nanocomposite showed one phase suggesting the miscibility between rubber and hydrogel phases. The swelling measurement of the synthesized silver rubber-hydrogel nanocomposite in different pHs at room temperature was performed. The results showed that it has pH-sensitivity.

Highlights

Recent advances in the design and synthesis of hydrogels for a wide range of applications have been made by introducing other compatible materials with them
The procedure of polymerization and in situ nanoparticle formation induced by gamma irradiation (a) and (b) are the solution of (SBR/ PVP/MAA) and (SBR/PVP/MAA/ AgNO3), respectively, before exposure to γ-rays and (a) and (b) the hybrid rubber-hydrogel and rubber-hydrogel silver nanocomposite of (SBR/PVP/ Poly(methacrylic acid) (PMAA)) and (SBR/PVP/PMMA)/ Ag, respectively, after exposed to 20 kGy γ-rays
Preparation of pH sensitive rubber-hydrogel matrices using gamma irradiation gives a new material for appreciated applications related to pH effects

Summary

Introduction

Recent advances in the design and synthesis of hydrogels for a wide range of applications have been made by introducing other compatible materials with them. Depending on the nature of functional groups, the hydrogel will swell or contract in response to a change in the local chemical environment These pH-sensitive hydrogels have applications in controlling valves that are sensitive to a change in pH such as in systems that can release a compound (Peterson, 2014), controlled drug delivery systems (Kim & Peppas, 2003), and in membrane separations. Radiolytic in situ formation of AgNPs is rarely described in previous literature with extended analysis (Jovanović et al, 2011), such as radiolytic synthesis of AgNPs within poly(N-vinyl-2-pyrrolidone) (PVP) hydrogel for biomedical application (Kacarevic-Popovic et al, 2010), rubber composite fibers containing AgNPs were prepared through combination of electrospinning and in situ chemical crosslinking (Hu, Wu, Zhang, Fong, & Tian, 2012). The swelling of rubber-hydrogel matrices embedded and non-embedded AgNPs in water or in different buffers at various pH’s were investigated

Experimental

Results and discussion

Characterization of sliver rubber-hydrogel nanocomposites

Conclusion