Polydimethylsiloxane modified chitosan. Part III: Preparation and characterization of hybrid membranes

Enescu, Daniela; Hamciuc, Viorica; Ardeleanu, Rodinel; Cristea, Mariana; Ioanid, Aurelia; Harabagiu, Valeria; Simionescu, Bogdan C.

doi:10.1016/j.carbpol.2008.10.026

Cited by 42 publications

(29 citation statements)

References 46 publications

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“…On the other hand, formation of organic-inorganic composite film provides another approach to improve the physicochemical properties of chitosan and other biomaterials. Introduction of silica into the chitosan film increases its oxygen permeability, biocompatibility, and biodegradability [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Chitosan-silica composite for pH-sensitive film [2] and biodegradable/biocompatible materials prepared from tetraethoxysilane (TEOS) [2], tetraethoxysilane/vinyl triethoxysilane (TEOS/VTES) [1], 3-aminopropyltriethoxy silane [7], α-(glycidyloxypropyl)trimethoxysilane (GPTMS) [1], polydimethylsiloxane [8] have been reported.…”

Section: Introductionmentioning

confidence: 99%

“…The thermo stability and mechanical performances of the composite films are higher than that of chitosan film and increased with increasing the amount of silica added. However, the mechanical performance deteriorates with the excessive silica [1][2][3][5][6][7][8]. Addition of food-grade plasticizers (polyethylene glycol, PEG) to film-forming alleviates this problem.…”

Section: Introductionmentioning

confidence: 99%

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Physical Characteristics of Chitosan Based Film Modified With Silica and Polyethylene Glycol

2014

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Physical Characteristics of Chitosan Based Film Modified With Silica and Polyethylene Glycol

2014

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“…Similarly, Enescu's group (Enescu 2009;Enescu et al 2009) prepared mono epoxy-terminated PDMS (GP-PDMS), which, together with c-glycidoxypropyltrimethoxysilane (GP-TMS), were used to simultaneously graft and crosslink chitosan, thus generating organic-inorganic hybrid chitosan membranes. The incorporation of PDMS produced a modest decrease in water wettability, as shown by water contact angle increases reaching 25°at most.…”

Section: Chemical Modificationsmentioning

confidence: 99%

“…Recently, various authors looked into different possibilities of enhancing the hydrophobic character of hybrid polydimethylsiloxane (PDMS)-chitosan membranes (Enescu 2009;Enescu et al 2009;Rutnakornpituk et al 2006). Rutnakornpituk et al (2006) functionalized the Si-H end-groups of PDMS of different DPs with allyl glycidyl ether, to introduce epoxy functional groups, and subsequently coupled these epoxidized PDMSs with chitosan under aqueous acidic conditions, which induced the crosslinking of the system (Fig.…”

Section: Chemical Modificationsmentioning

confidence: 99%

Turning polysaccharides into hydrophobic materials: a critical review. Part 2. Hemicelluloses, chitin/chitosan, starch, pectin and alginates

2010

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This survey constitutes the second part of a comprehensive review, whose purpose is to provide a reasoned perspective on the field related to the preparation of new polysaccharide-based hydrophobic materials by scrutinizing the actual state of its art. After dealing with the major topic of cellulose hydrophobization in the first part, attention is now turned to the other important members of the polysaccharide families, namely hemicelluloses, chitin/chitosan, starch, pectin and alginates. Publications dealing with both chemical and physical treatments aimed at inducing a substantial increase in the hydrophobic character of their surface are critically examined within the broader context of the elaboration of novel materials based on renewable resources as a viable alternative to their fossil-based counterparts.

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A novel gastric release PEG‐enclatherated polymethacrylate‐based memblet system

Cooppan

Choonara

Toit

et al. 2012

J of Applied Polymer Sci

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A novel polymethacrylate‐based membranous system referred to as a “memblet” was developed for potential application in controlled gastric drug delivery. A polymethacrylate‐based latex, Eudragit® E100, was enclatherated with a 60% w/v and a 30% w/v solution of polyethylene glycol 4000 to form hydrogel formulations A and B, respectively. The hydrogels were subsequently compressed into memblets that were characterized for thermal, rheological, morphological, mechano‐chemical properties, and in vitro gastric drug release analysis. Molecular mechanics (MM) simulations were performed to corroborate the experimental findings. Critical yield values of 15.39 and 5.239 Pa were obtained for hydrogel A and B, respectively. The viscoelastic region was found to be <10.67 and 2.542 Pa for hydrogels A and B, respectively. The storage modulus was greater than the loss modulus for hydrogel A while the inverse was true for hydrogel B. Thermal, mechanical, and surface morphology evaluation revealed that the converse was true for the dried membrane structure with hydrogel B having superior characterization profiles than hydrogel A. Notably, the lower PEG concentration (30% w/v) displayed better characterization profiles than a higher concentration (60% w/v). Through MM simulations, desirable agreement between the theoretical and experimental results was achieved over the given concentration range of PEG. Based on the gastric drug release analysis, memblets formulated with hydrogel B displayed superior control of drug release. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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Polydimethylsiloxane modified chitosan. Part III: Preparation and characterization of hybrid membranes

Cited by 42 publications

References 46 publications

Physical Characteristics of Chitosan Based Film Modified With Silica and Polyethylene Glycol

Physical Characteristics of Chitosan Based Film Modified With Silica and Polyethylene Glycol

Turning polysaccharides into hydrophobic materials: a critical review. Part 2. Hemicelluloses, chitin/chitosan, starch, pectin and alginates

A novel gastric release PEG‐enclatherated polymethacrylate‐based memblet system

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