Biodegradation of chemically modified gelatin films in soil

Далев, П.; Patil, Rahul; Mark, J. E.; Vassileva, Elena; Fakirov, S.

doi:10.1002/1097-4628(20001114)78:7<1341::aid-app40>3.0.co;2-2

Cited by 62 publications

(31 citation statements)

References 7 publications

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“…The results obtained were very similar to those observed in the case of river and lake water exposure 3. It was shown that the rate of biodegradation depended on the network density of the samples 5…”

Section: Introductionsupporting

confidence: 85%

“…The same samples were tested for their biodegradability by burial testing under laboratory conditions with controlled temperature and humidity 5. The results obtained were very similar to those observed in the case of river and lake water exposure 3.…”

Section: Introductionsupporting

confidence: 65%

“…Gelatin‐based silk‐ or linen‐reinforced laminates are subject to dissolution, similarly to the gelatin and gelatin‐based materials, studied in previous works 3–5…”

Section: Discussionmentioning

confidence: 99%

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Dissolution and Enzymatic Degradation Studies Before and After Artificial Ageing of Silk‐ or Linen‐Reinforced Gelatin Laminates, 1

Boyanova

Stambolieva

Apostolov

et al. 2003

Macro Materials & Eng

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In an attempt to overcome the poor mechanical properties of native, i.e., untreated gelatin, laminates based on gelatin and gelatin/starch blend reinforced with fabrics (linen or silk) were prepared by melt pressing. The mechanical properties of fresh and artificially aged samples were reported previously. In the present series of two consecutive papers we present data concerning the dissolution and biodegradation of these laminates. A two‐step procedure for treatment of the laminates was used. The first step is treatment with an aqueous buffer solution, the second with a buffered solution of the enzyme subtilisin. The time‐course of the absorbance at 280 nm of the “washing” solutions was followed. A number of kinetic characteristics was determined and discussed with respect to laminate composition and their treatments. In the present Part 1 about the environmental behavior of these new biodegradable materials, the non‐enzymatic solubilization in water and buffer solution (i.e., simple dissolution) of fresh and artificially aged samples is described. The dissolution process was followed spectrophotometrically as well as by the weight losses. It was found that gelatin‐based silk‐ or linen‐reinforced laminates were subject to dissolution, similarly to the gelatin and gelatin‐based materials studied in previous works. In addition, it was established that the thermal treatment of the laminates during their melt pressing leads to postcondensation reactions and crosslinking of the gelatin macromolecules. Similar reactions occur between the matrix and the reinforcing element silk, thus improving their mutual adhesion. Decreased gelatin dissolution ability was observed after the thermal treatment, in the presence of reinforced fabrics and upon “additional” crosslinking with methylenedi(p‐phenyl) diisocyanate. The untreated gelatin is the only one that dissolves completely in water. The artificially aged samples tend to dissolve better than the respective fresh samples due to degradation processes during aging. magnified image

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Section: Introductionsupporting

confidence: 85%

Section: Introductionsupporting

confidence: 65%

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Dissolution and Enzymatic Degradation Studies Before and After Artificial Ageing of Silk‐ or Linen‐Reinforced Gelatin Laminates, 1

Boyanova

Stambolieva

Apostolov

et al. 2003

Macro Materials & Eng

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“…It is well known that gelatin‐based materials are susceptible to the action of enzymes (proteases) which are present in a variety of microorganisms 1, 44. Gelatin is also sensitive to the attack of filamentous fungi under humid conditions 45, 46.…”

Section: Resultsmentioning

confidence: 99%

“…This result was mainly attributed to the biocide activity of phenol from phenolic resin. The biodegradation of chemically modified gelatin films was also analyzed in different environments such as river and lake water and in soil under laboratory conditions 1, 44. It was shown that the rate and extent of biodegradation depended on the type of crosslinking reagent and on the crosslinking density.…”

Section: Resultsmentioning

confidence: 99%

Tensile properties, barrier properties, and biodegradation in soil of compression—Molded gelatin‐dialdehyde starch films

Martucci

Ruseckaite

2009

J of Applied Polymer Sci

123

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Glycerol (Gly)-plasticized gelatin (Ge) films crosslinked with dialdehyde starch (DAS) as environmentally friendly crosslinking agent were successfully produced by compression molding, demonstrating the capacity of gelatin of being transformed into films by using thermoplastic processes. The effect of DAS content on the color, light transmission, total soluble matter (TSM), water uptake (WU), water vapor permeability (WVP), oxygen permeability (OP) as well as biodegradability during soil burial was investigated. The addition of up to 10 wt % DAS (Ge-10DAS) generated transparent films, with reduced TMS, WU, WVP, and OP values but higher extensivity than the uncrosslinked counterpart. Further incorporating DAS into plasticized-gelatin matrix conducted to phase separation with detrimental effect of transparency and tensile properties. DAS-containing films degraded at slow rate than the uncrosslinked counterpart, suggesting that biotic attack during soil burial is restricted by covalent crosslinking points induced by DAS. Ge-10DAS films lost about 28% of their initial mass within the first 8 days of exposure to degrading medium; therefore, the material can be classified as rapidly degradable.

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Drying biodegradable poly(hydroxybutyrate‐co‐3‐hydroxyvalerate) gels in the elongated state to improve their mechanical properties

Venkitachalam

Mark

Noda

2005

J of Applied Polymer Sci

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ABSTRACT:Polyhydroxyalkanoates are a class of biodegradable polymers that may be used more as environmentally friendly materials if their mechanical properties can be improved. We approached this goal by modifying poly(3-hydroxybutyrate-co-3-hydroxyvalerate) with a well-established processing technique involving crosslinking the polymer chains and then drying a swollen gel of the network under uniaxial strain. The mechanical properties of the resulting oriented films were determined in continuous extension as a function of the degree of crosslinking and the extent of strain during the drying process. Crosslinking invariably improved the toughness. Similarly, the subsequent orientation of the process generally increased the toughness as well, but in some cases, a reduction in the extensibility offset the increase in the ultimate stress at break and yielded reduced values of the toughness.

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Biodegradation of chemically modified gelatin films in soil

Cited by 62 publications

References 7 publications

Dissolution and Enzymatic Degradation Studies Before and After Artificial Ageing of Silk‐ or Linen‐Reinforced Gelatin Laminates, 1

Dissolution and Enzymatic Degradation Studies Before and After Artificial Ageing of Silk‐ or Linen‐Reinforced Gelatin Laminates, 1

Tensile properties, barrier properties, and biodegradation in soil of compression—Molded gelatin‐dialdehyde starch films

Drying biodegradable poly(hydroxybutyrate‐co‐3‐hydroxyvalerate) gels in the elongated state to improve their mechanical properties

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