Starch-sorbitol films

Time domain NMR was used to elucidate the molecular mechanisms involved in the plasticization and mobility in starch-sorbitol films.129... 

Gaudin, S., Lourdin, D., Le Botlan, D., fieri, J.L. and Colonna, P. (1999) Plastidsation and mobility in starch-sorbitol films. Journal of Cereal Science,... 

Starch-PVA films plasticized with glycerol embrittled with age. A study of various polyols was undertaken to identity plasticizers which would reduce this tendency.131 It was demonstrated that sorbitol and glycol glycoside performed well. When sorbitol alone was used, it migrated to the surface and crystallized. When sorbitol and glycerol were used in a 3 1 w/w ratio, the films were stable and showed no evidence of sorbitol crystallization. Substituting plasticizer with PVA did not adversely affect the films when starch was substituted for plasticizer, the films became more susceptible to aging. 

Surimi is fish paste from deboned fish used to make simulated crab legs and other seafood. For preservation the paste is blended with cryoprotectants, such as sucrose, sorbitol and phosphates, and frozen. To make the final product, the frozen paste is thawed, blended with starch and extruded as a film onto a belt. The belt takes the film into an oven that heat-denatures the fish protein and cooks the starch. The film is then rolled to form striations, shaped, colored and cut. Depending on the required distribution, the product is frozen or refrigerated. Potato and tapioca starch were used in surimi products 400 years ago, since they provided a cohesive, elastic matrix consistent with seafood. Frozen distribution has made the use of highly-stabilized, moderately crosslinked tapioca starch popular, alone or with native tapioca starch. Modified waxy maize products are used, as is unmodified com starch, for increased cuttability. Kim188 reported that the gel strengthening ability of starch correlates with starch paste viscosity. 

Elastic and flexible potato starch-based films could be prepared fairly well using binary polyol mixtures as plasticizers but brittle films were obtained without plasticizer. Potato starch-based films plasticized with glycerol-polyol used and xylitol-sorbitol mixtures with content up to 40 and 50%, respectively, were easy to handle. Potato starch-based films were sticky with the glycerol-polyol content of 50% and thus difficult to handle. The thickness obtained for starch-based films was in the range of 33 to 74 /rm. 

CS-100. See Dimethicone CS-420. See Silicone emulsion CS-922. See Calcium sodium caseinate CSA. See Chlorosulfuric acid CSC. See 4-Cyanobenzenesulfonyl chloride CSE-6000 Series. See Epoxy resin CSet. See Starch CS Film. See Polyethylene CS gas. See o-Chlorobenzylidene malononitrile CSM. See Polyethylene, chlorosulfonated C Sodium Silicate. See Sodium silicate CSorbidex C CSorbidex NC] CSorbidex P, CSorbidex S. See Sorbitol CSP. See Cupric sulfate pentahydrate CSPE. See Polyethylene, chlorosulfonated CStabiTex 06301] CStabiTex 06305] CStabiTex 06307. See Food starch, modified CStabiTex-lnstnat 12631] CStabiTex-lnstnat 12632. See Starch, pregelatinized CSX-240. See Carbon black CT-58. See Zinc phosphate CT-62. See Zinc chloride CT-70. See Sodium silicate CT-708 Potable Water Treatment. See Sodium hexametaphosphate CT-781] CT-788. See Zinc phosphate CTA. See 4-(Methylthio) benzonitrile CTA. See 2-Ethylhexyl thioglycolate... 

Spray Drying. Spray-dry encapsulation processes (Fig. 7) consist of spraying an intimate mixture of core and shell material into a heated chamber where rapid desolvation occurs to thereby produce microcapsules (24,25). The first step in such processes is to form a concentrated solution of the carrier or shell material in the solvent from which spray drying is to be done. Any water- or solvent-soluble film-forming shell material can, in principle, be used. Water-soluble polymers such as gum arable, modified starch, and hydrolyzed gelatin are used most often. Solutions of these shell materials at 50 wt % soHds have sufficiently low viscosities that they stiU can be atomized without difficulty. It is not unusual to blend gum arable and modified starch with maltodextrins, sucrose, or sorbitol. 

Polymers. In combination with various metal salts, sorbitol is used as a stabilizer against heat and light in poly(vinyl chloride) (qv) resins and, with a phenohc antioxidant, as a stabilizer in uncured styrene—butadiene mbber (qv) compositions and in polyolefins (see Heat stabilizers Olefin POLYMERS Rubbercompounding). Heat-sealable films are prepared from a dispersion of sorbitol and starch in water (255). Incorporation of sorbitol in coUagen films gready restricts their permeabiUty to carbon dioxide (256). 

In this study, we investigated effects of binary mixtures (1 1) of glycerol, xylitol, and sorbitol on physical and mechanical properties of potato starch-based edible films stored at various relative humidities. 

Krogars, K., Heinamaki, J., Karjalainen, M., Niskanen, A., Leskela, M., and Yliruusi, J. Enhanced stability of rubbery amylose-rich maize starch films plasticized with a composition of sorbitol and glycerol, Int. J. Pharm., 251, 205, 2003. 

In this book Song et al (10) described a novel nucleation and mineral growth process to produce a bone-like biomineral con site. The crosslinked gelatin-chitosan blend made by Payne et al fi/J may perhaps be used as biomimetic soft tissue or for bioencapsulation. The sorbitol-based polyesters synthesized by Mei at al (27) and Kulshrestha et al (26) may possibly find applications in tissue engineering. Biswas et al (13) described the preparation and the mechanical properties of modified zein. Fishman et al (12) made pectin-starch and pectin-poly(vinyl alcohol) blends and found them to be strong, flexible films. 

Bourtoom and Chinnan (2008] studied the WVP of rice starch-chitosan blend films with different type and concentrations of plasticizer. They observed that the WVP increased from 5.45 to 8.68 gmm/m day kPafor sorbitol 14.53 to 28.73 gmm/m day kPa for glycerol and finally from 14.70 to 19.10 g mm/m day kPa for polyethylene glycol. This tendency was due to possible structural modifications of the polymer network and also because the network could become less dense as a result of increasing the mobility of the polymeric chains or by the free volume of the film. Also, the increase of WVP could be related to the hydrophilicity of the plasticizers because the presence of this material increases the concentration of polar residues in hydrocolloid based film... 

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