Inulin mixed esters crosslinked with 2-ethyl-hexyl-acrylate and their promotion as bio-based materials (original) (raw)
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Polysaccharide based plastic materials were obtained using modified inulin with methcryloyl and palmitoyl chlorides. These esters were copolymerised with n-butyl acrylate and 2-ethyl hexyl acrylate. The hardness of the obtained samples was evaluated using the Hőppler equipment. Moreover, the chemical stability of the samples in acid and basic medium was evaluated.
chim.upt.ro
Inulin was esterified with methacryloyl chloride and palmytoyl chloride in order to transform the polysaccharide into a possible biodegradable plastic. The obtained inulin esters were, further, copolymerized with n-butyl acrylate and 2ethyl hexyl acrylate. The FT-IR spectroscopy was used to characterize the inulin esters and the obtained copolymers. The glass transition temperature was evaluated using DSC and DMA technique. Furthermore, using DMA the storage and loss modulus was evaluated. Thermogravimetrical studies were carried out on the plastics and the thermal stability of the obtained products was studied. These new modified polysaccharides would have biodegradability properties.
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In this preliminary study, inulin, a fructooligosaccharide extracted from chicory roots, was converted into plastic films by acylation in homogeneous media and under conventional heating, using methacryloyl and lauroyl chlorides as acylating reagents and N,N-dimethyl-4-aminopyridine as basic catalyst. Products were analyzed by FT-IR and 1 H NMR spectroscopies to confirm their structures. A preliminary study of their thermal properties was also achieved.
Synthesis of fructooligosaccharide-based plastic films starting from inulin
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In this preliminary study, inulin, a fructooligosaccharide extracted from chicory roots, was converted into plastic films by acylation in homogeneous medium and under conventional heating, using methacryloyl and lauroyl chlorides as acylating reagents and N,N-dimethyl-4-aminopyridine as basic catalyst. Products were analyzed by FT-IR and 1 H NMR spectroscopies to confirm their structures. A preliminary study of their thermal properties was also achieved. Unauthenticated Download Date | 2/15/16 4:33 PM CH 2 O OH HO O HO O OH HO O HO OH
Carbohydrate Polymers, 2010
The  (2 → 1) fructosyl fructose unit containing carbohydrate polymer (inulin) exhibits interesting solution properties. Its physicochemical behaviors in aqueous and aquo-organic (DMSO-water and isopropanol (IP)-water) media as well as in solvent depleted states have been investigated using viscometry, DLS, TEM and AFM methods. The solvent type and composition dependent changes in aggregation of the biopolymer have been examined. The energetics of solubility of inulin in water and IP-water media, and the salt effect on the process have been evaluated. The salting out phenomenon has been examined in terms of Hofmeister or lyotropic series. Its correlation with ionic radius, hydrodynamic radius, and lyotropic number has been tested. The molecular configurations of the polysaccharide in the solvent media have been assessed by the DLS method. In the solvent removed state, globular, rod-like and elongated fiber-like species registering fingerprint patterns of the biopolymer have been witnessed from TEM and AFM measurements. (S.P. Moulik). . But studies on different solution properties of inulin remain to be inadequate. Recently, we have attempted to characterize chicory inulin in both solid and solution states. Its molar mass, sorption of water vapor, thermal solubility, hydration, viscosity behavior in water and in DMSO, molecular association and configuration in these media, etc have been studied . The polymer has evidenced interesting solution behavior which has prompted us to study the polymer further.
Inulin - A versatile polysaccharide with multiple pharmaceutical and food chemical uses
alpha-D-glucopyranosyl-[beta-D-fructofuranosyl](n-1)-D-fructofuranoside, commonly referred to as inulin, is a natural plant-derived polysaccharide with a diverse range of food and pharmaceuticalapplications. It is used by the food industry as a soluble dietary fibre and fat or sugar replacement, and in the pharmaceutical industry as a stabiliser and excipient. It can also be used as a precursor in the synthesis of a wide range of compounds. New uses for inulin are constantly being discovered, with recent research into its use for slow-release drug delivery. Inulin, when in a particulate form, possesses anti-cancer and immune enhancing properties. Given its increasing importance to industry, this review explains how inulin's unique physico-chemical properties bestow it with manyuseful pharmaceutical applications.
Inulin, a flexible oligosaccharide I: Review of its physicochemical characteristics
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Inulin, a fructan-type polysaccharide, consists of (2→1) linked β-d-fructosyl residues (n=2-60), usually with an (1↔2) α-d-glucose end group. The applications of inulin and its hydrolyzed form oligofructose (n=2-10) are diverse. It is widely used in food industry to modify texture, replace fat or as low-calorie sweetener. Additionally, it has several applications in other fields like the pharmaceutical arena. Most notably it is used as a diagnostic agent for kidney function and as a protein stabilizer. This work reviews the physicochemical characteristics of inulin that make it such a versatile substance. Topics that are addressed include morphology (crystal morphology, crystal structure, structure in solution); solubility; rheology (viscosity, hydrodynamic shape, gelling); thermal characteristics and physical stability (glass transition temperature, vapor sorption, melting temperature) and chemical stability. When using inulin, the degree of polymerization and processing history sh...