Journal ArticleDOI
Water-soluble polymers and gels from the polycondensation between cyclodextrins and poly(carboxylic acid)s: A study of the preparation parameters
TLDR
In this paper, a polyesterification reaction between cyclodextrins (CDx) and poly(carboxylic acid)s (PCAs) was performed in the dry state at a temperature greater than 140°C in air or in vacuo.Abstract:
Native cyclodextrins (CDx) and some of their derivatives were reacted with poly(carboxylic acid)s (PCAs) (citric acid (CTR), 1,2,3,4-butanetetracarboxylic acid (BTCA), and poly(acrylic acid) (PAA)). These reactions were carried out in the dry state at a temperature greater than 140°C in air or in vacuo. They resulted in water-soluble and insoluble polymers formed by polyesterification between CDx and PCA. In this study, the parameters of the reaction were studied, and their influence on the water solubility or swellability of the obtained polymers was investigated. High reaction temperatures, high PCA/CDx molar ratios, and long reaction times preferably yielded insoluble gels, whereas softer conditions resulted in very soluble polymers. The gels could swell up to 10 times their initial volume in water, and the water-soluble fraction had a solubility of 1 g/mL. A reaction mechanism was proposed that required the use of PCA carrying at least three neighboring carboxylic groups (CTR, BTCA, and PAA), and it was confirmed ex- perimentally by the unsuccessful use of some dicarboxylic acids. A preliminary characterization by Fourier transform infrared spectroscopy and size exclusion chromatography was also conducted. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 433- 442, 2005read more
Citations
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Journal ArticleDOI
A review on the application of inorganic nano-structured materials in the modification of textiles: focus on anti-microbial properties
Roya Dastjerdi,Majid Montazer +1 more
TL;DR: This review paper has focused on the properties and applications of inorganic nano-structured materials with good anti-microbial activity potential for textile modification and the application methods for the modification of textiles using nano- structured materials.
Journal ArticleDOI
Cyclodextrins for drug delivery
TL;DR: A large number of scientists have attempted to elaborate and evaluate various CD derivatives that are able to complex a variety of drugs, enhancing by this way their in vivo solubility and activity.
Journal ArticleDOI
Chemically cross-linked and grafted cyclodextrin hydrogels: from nanostructures to drug-eluting medical devices.
TL;DR: The present review focuses on the approaches tested to synthesize nano- to macro-size covalently cross-linked CD networks and the advantages of having the CDs chemically bound among themselves and to substrates are provided and their applicability in therapeutics discussed.
Journal ArticleDOI
Surface modification of electrospun polyester nanofibers with cyclodextrin polymer for the removal of phenanthrene from aqueous solution.
TL;DR: PET/CDP nanofibers can be a very good candidate as a filter material for water purification and waste treatment owing to their very large surface area as well as inclusion complexation capability of surface associated CDP.
Journal ArticleDOI
Evolution of Cyclodextrin Nanosponges.
TL;DR: The 4th generation of NSs is represented by stimuli-responsive CD polymers, which are able to modulate their behavior according to external variations in the environment, such as pH and temperature gradients, oxidative/reducing conditions, and the following review focuses on the evolution of cyclodextrin nanosponges.
References
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Book
Principles of polymerization
TL;DR: In this paper, the authors present an overview of the properties of polymers and their applications in the literature, including the following: 1.1 Types of Polymers and Polymerization. 2.3 Linear, Branched, and Crosslinked Polymers.
Journal ArticleDOI
Theory of Molecular Size Distribution and Gel Formation in Branched‐Chain Polymers
TL;DR: The most probable distributions of molecular sizes are calculated for certain types of branched-chain polymers in this paper, which represent an extension of the previous work of Flory, who showed that very large polymeric molecules appear suddenly at a critical extent of reaction, which is predicted to occur very nearly at the experimentally observed gel point.