Biodegradation of chitosan-graft-polymethylmethacrylate films

Prashanth, K. V. Harish; Lakshman, Kshama; Shamala, T. R.; Tharanathan, R. N.

doi:10.1016/j.ibiod.2005.06.007

Cited by 36 publications

(8 citation statements)

References 18 publications

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“…This phenomenon of hydrogel porosity permits loading of drug into the gel matrix and subsequent drug release 10. Different natural polymers such as pullulan,11 cellulose,12 starch,13, 14 chitosan,14–16 amylopectin,12 amylase12, 17 and sodium alginate18 have been utilized to be used as drug delivery systems.…”

Section: Introductionmentioning

confidence: 99%

Pectin grafted poly(N‐vinylpyrrolidone): Optimization and in vitro controllable theophylline drug release

Fares

Assaf

Abul‐Haija

2010

J of Applied Polymer Sci

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The present article describes preparation, optimization, and characterization of pectin grafted polyvinylpyrrolidone hydrogels followed by controllable theophylline drug release. The gels were prepared in the presence of N,N 0 -methylenebisacrylamide (MBAA) crosslinker and ceric ammonium nitrate (CAN) initiator under N 2 atmosphere. Optimum conditions, in terms of percent of grafting (%G), were determined as follows:

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Section: Introductionmentioning

confidence: 99%

Pectin grafted poly(N‐vinylpyrrolidone): Optimization and in vitro controllable theophylline drug release

Fares

Assaf

Abul‐Haija

2010

J of Applied Polymer Sci

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“…matrix itself. Literature reports that Aspergillus grows on the surface of PU and PMMA [14,15] and further, we note that presence of natural polymers would enhance the biodegradation of synthetic polymer system [44]. The selective degradation of natural polymer GG on priority would expose more surface area of synthetic polymer that would lead to availability of more areas for microorganisms to sit and act on the polymer system and thus there will be enhanced biodegradation [15].…”

Section: Pals Results After Biodegradationmentioning

confidence: 78%

“…Fungal species indigenous to soil and surface water, namely, Aspergillus niger and Cladosporium herbarum, were found to be effective in the deterioration of polyether based polyurethane (PU) [13]. Researchers have already made a note of Aspergillus growth on the surface of PU and PMMA [14,15] and also found that the presence of natural polymers would enhance the biodegradation of synthetic polymer systems [16][17][18]. In the present research, the authors have chosen fungi A. niger for the biodegradation of gaur gum (GG) filled polyethylene glycol based polyurethane/ polymethyl methacrylate (PU/PMMA) semi-interpenetrating network (SIPN).…”

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confidence: 99%

Correlation Between Physico-Mechanical and Free Volume Properties of Gaur-Gum Filled Polyurethane/Polymethyl Methacrylate Biodegradable Composites

Kumar¹,

Ranganathaiah

Siddaramaiah³

2008

Journal of Composite Materials

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This study reports characterization of polyurethane/polymethyl methacrylate (PU/PMMA, 50/50) Semi-Interpenetrating Polymer Network (SIPN) prepared by in-situ polymerization, and filled with different weight percent (wt%) of natural polymer, Gaur-Gum (GG). These are characterized for density, tensile strength and percentage elongation at break. Positron annihilation lifetime measurements have also been carried out to measure the free volume of these composites. The results show good correlation between free volume content of the composites with the mechanical properties. These natural polymer-filled composites were subjected to biodegradation using a specific microorganism, Aspergillus niger. The influence of A. niger on composites has also been studied. The results show that the weight loss of the specimens exposed to A. niger media increases with increase in gaur gum in the composite. Interestingly the weight loss of GG-filled composites seems to be more than the quantum of GG incorporated which is a clear indication that degradation of PU/PMMA system is responsible for the weight loss.

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“…Literature survey revealed that, A. niger has tendency to attack galacomannan a major storage polysaccharide in seeds of leguminous plants . There are literature that were reported the growth of A. niger on the surface of polymer films …”

Section: Resultsmentioning

confidence: 99%

Studies on thermal behavior, moisture absorption, and biodegradability of ginger spent incorporated polyurethane green composites

Chethana

Prashantha

Siddaramaiah³

2014

J of Applied Polymer Sci

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Ecological concern on accumulation of neutraceutical industrial waste material and the demands for newer composite materials have promoted extensive research on utilizing industrial wastes materials. Therefore, in the present study finely powdered ginger spent (GS), filled polyurethane (PU) green composites with varying amount viz., 0, 2.5, 5, 7.5, and 10 wt % of GS have been fabricated. The prepared PU/GS green composites have been characterized for their mechanical properties, density and void content. Interaction between filler and matrix has been confirmed from Fourier transform infrared spectroscopy studies. Moisture absorption and desorption studies have been performed at different relative humidity (RH). The moisture absorption and desorption studies, shows that as the hydrophilic GS content increases in the matrix the RH also increases. Water uptake behavior of PU/GS were measured in different chemical environments such as 5% sodium chloride solution, cold water at different temperature and in hydrochloric acid solution. The water uptake values increases as increase in GS concentration. Equilibrium water content, diffusivity and equilibrium time taken for all PU/GS composites have been investigated. Biodegradation studies reveals that as the GS content increases the weight loss also increases. Thermal properties have been performed using differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). From DSC and DMA thermograms it is revealed that increase in T g with increase in GS content. RH and contact angle measurement have been performed to understand the hydrophilic nature of the prepared composite. The morphological behavior of composites has been studied using scanning electron microscopy.

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Biodegradation of chitosan-graft-polymethylmethacrylate films

Cited by 36 publications

References 18 publications

Pectin grafted poly(N‐vinylpyrrolidone): Optimization and in vitro controllable theophylline drug release

Pectin grafted poly(N‐vinylpyrrolidone): Optimization and in vitro controllable theophylline drug release

Correlation Between Physico-Mechanical and Free Volume Properties of Gaur-Gum Filled Polyurethane/Polymethyl Methacrylate Biodegradable Composites

Studies on thermal behavior, moisture absorption, and biodegradability of ginger spent incorporated polyurethane green composites

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