A Biogradable Starch Based Coating to Waterproof Hydrophilic Materials

Fringant, C.; Rinaudo, Marguerite; Gontard, Nathalie; Guilbert, Stéphane; Derradji, H.

doi:10.1002/(sici)1521-379x(199807)50:7<292::aid-star292>3.0.co;2-#

Cited by 40 publications

(24 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In this sense, to control the hydrophilic character of films, hydrophobic agents such as waxes and oils have been used, but these additives influence the mechanical properties. [13][14][15] Other researchers [16][17][18][19][20] have reported that starch acetylation can be used to decrease the hydrophilic character. A dual modification is a combined chemical treatment with the objective of taking advantage of each property obtained with the two modifications.…”

Section: Introductionmentioning

confidence: 99%

Influence of the oxidation and acetylation of banana starch on the mechanical and water barrier properties of modified starch and modified starch/chitosan blend films

Zamudio‐Flores

Torres²,

Salgado-Delgado³

et al. 2009

J of Applied Polymer Sci

View full text Add to dashboard Cite

Banana starch was oxidized at three different levels and afterwards acetylated. The double-modified starch was used for film preparation with the addition of chitosan. The physical, mechanical, and barrier properties were tested. The oxidation level increased the moisture content of the film, but the acetylation and the addition of chitosan decreased this characteristic. The oxidation level increased the whiteness of the film, but the second modification (acetylation) and the addition of chitosan to the blend did not affect this parameter. The solubility increased with the temperature and the oxidation level but decreased with the storage time of the film. The oxidation increased and the acetylation reduced the solubility with respect to the native starch film. The dual modification produced a solubility value less than that of its oxidized counterpart, and the addition of chitosan produced the highest solubility value. The addition of chitosan increased the tensile strength of the film, and the effect was higher with the oxidation level and longest storage time. The addition of chitosan produced a higher elongation value than that of its double-modified film, but at the longest storage time, this parameter decreased. The water vapor permeability increased with the oxidation level because of the hydrophilic character, but the acetylation reduced this parameter because the acetylation increased the hydrophobic character of the starch due to the ester group. Films prepared with the double-modified banana starch and the addition of chitosan had some improved physical, mechanical, and barrier properties, and they may be used in specific applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of the oxidation and acetylation of banana starch on the mechanical and water barrier properties of modified starch and modified starch/chitosan blend films

Zamudio‐Flores

Torres²,

Salgado-Delgado³

et al. 2009

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Most applications, however, demand water insolubility. For this purpose, Fringant et al (1996) proposed the coating of foams with a more hydrophilic material such as acetylated starch 18. A second approach consists of foaming the acetylated starch directly instead of the pure starch 19.…”

Section: Introductionmentioning

confidence: 99%

Extrusion Foaming of Semi‐Crystalline PLA and PLA/Thermoplastic Starch Blends

Mihai

Huneault

Favis

et al. 2007

Macromolecular Bioscience

170

View full text Add to dashboard Cite

Low-density open-cell foams were obtained by extrusion process from polylactic acid (PLA) and from blends of PLA with thermoplastic starch (TPS) using CO 2 as blowing agent. Two unexpected features were found. First, a 2D cavitation process in the fractured cell walls was unveiled. Elliptical cavities with dimensions in the 100-300 nm range were aligned perpendicular to large cell cracks clearly exhibiting 2D crazing prior to macroscopic cell rupture. Secondly, a significant crystallization rate increase associated with the CO 2 foaming of PLA was discovered. While the PLA used in this study crystallized very slowly in isothermal crystallization, the PLA foams exhibited up to 15% crystallinity providing evidence for CO 2 plasticization effect, and the biaxial stretching upon foam expansion provided conditions that could increase the crystallization rate by several orders of magnitude.

show abstract

“…Starch acetates are novel biodegradable polymers which undergo slower degradation and swelling than native starch. Fringant et al (1998) and Tuovinen et al (2004) used acetylated starch with a degree of substitution (DS) of 3 to improve the resistance of biodegradable materials to moisture. Ganjyal et al (2004) prepared starch acetate-corn fibre foams by extrusion.…”

Section: Starch Acetylationmentioning

confidence: 99%

“…Acetylation of starch decreases significantly the water absorption by PCL/starch blends. This observation is in agreement with the experiments of Fringant et al (1998) and Tuovinen et al (2004) .…”

Section: Mechanical Behaviourmentioning

confidence: 99%

Application of wheat B-starch in biodegradable plastic materials

Šárka¹,

Kruliš²,

Kotek³

et al. 2011

Czech J. Food Sci.

View full text Add to dashboard Cite

AbstractŠárka E., Kruliš Z., Kotek J., Růžek L., Korbářová A., Bubník Z., Růžková M. (2011): Application of wheat B-starch in biodegradable plastic materials. Czech J. Food Sci., 29: 232-242.Food application of wheat B-starch comprising small starch granules as a result of lower quality is problematic. Accordingly, B-starch or acetylated starch prepared from it, with the degree of substitution (DS) of 1.5-2.3, was used in biodegradable films after blending with poly-(ε-caprolactone) (PCL). The following mechanical characteristics of the produced films were derived from the stress-strain curves: Young modulus, yield stress, stress-at-break, and strainat-break. Water absorption of PCL/starch (60/40) films was determined according to European standard ISO 62. The measured data were compared with those of commercial A-starch. The films containing native starch degraded in compost totally during 2 months. Acetylation of starch molecules in the composites reduced the degradation rate. Optical microscopy, in combination with the image analysis system NIS-Elements vs. 2.10 completed with an Extended Depth of Focus (EDF) module, was used to study the surface morphology of PCL/starch films after 20-day and 42-day compost incubation. Chemical changes in the compost used for the film exposition were measured.

show abstract

A Biogradable Starch Based Coating to Waterproof Hydrophilic Materials

Cited by 40 publications

References 9 publications

Influence of the oxidation and acetylation of banana starch on the mechanical and water barrier properties of modified starch and modified starch/chitosan blend films

Influence of the oxidation and acetylation of banana starch on the mechanical and water barrier properties of modified starch and modified starch/chitosan blend films

Extrusion Foaming of Semi‐Crystalline PLA and PLA/Thermoplastic Starch Blends

Application of wheat B-starch in biodegradable plastic materials

Contact Info

Product

Resources

About