Addition of glycerol plasticizer to seaweeds derived alginates: Influence of microstructure on chemical–physical properties

Avella, Maurizio; Pace, Emilia Di; Immirzi, Barbara; Impallomeni, Giuseppe; Malinconico, Mario; Santagata, Gabriella

doi:10.1016/j.carbpol.2007.01.011

Cited by 93 publications

(51 citation statements)

References 19 publications

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“…Polysaccharides, as agarose, galactomannans (guar gum, locust bean gum) and sodium alginate, are chosen as basic ingredients of the water-born solutions for their biodegradability, biocompatibility and non-toxicity and for their intrinsic properties to form water resistant coatings (Avella et al, 2007;Mormile et al, 2007). In order to improve the mulching function and the tensile strength of the spray coating, fillers (cellulose fibres, carbon black, fine bran of wheat and powdered seaweeds), plasticizing polymers (hydroxyethylcellulose), and natural plasticizers (glycerol and polyglycerol) were mixed to the polymeric matrices.…”

Section: Methodsmentioning

confidence: 99%

Biodegradable films and spray coatings as eco-friendly alternative to petro-chemical derived mulching films

Vox¹,

Santagata²,

Malinconico³

et al. 2013

J Agricult Engineer

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The use of plastic mulching films in horticulture causes the serious drawback of huge amount of wastes to be disposed of at the end of their lifetime. Several pre-competitive research products based on raw materials coming from renewable sources were recently developed to be used as biodegradable materials for soil mulching. Biodegradable materials are designed in order both to retain their mechanical and physical properties during their using time and to degrade at the end of their lifetime. These materials can be integrated directly in the soil in order to biodegrade because the bacterial flora transforms them in carbon dioxide or methane, water and biomass. The innovative materials can be obtained using natural polymers, such as starch, cellulose, chitosan, alginate and glucomannan. Biodegradable extruded mulching films were performed by means of thermo-plasticizing process. Spray mulch coatings were realized directly in field, by spraying water solutions based on natural polysaccharides, thus covering the cultivated soil with a protective thin geo-membrane. In this paper an overview on the formulation development, processing understanding, field performance, mechanical and radiometric properties of these innovative materials for soil mulching is presented. In field the biodegradable mulching films showed suitable mechanical properties if compared to the low density polyethylene films. The radiometric properties and their effect on the temperature condition and on weed control in the mulched soil were evaluated too. At the end of their lifetime the biodegradable materials were shattered and buried into the soil together with plants.

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Section: Methodsmentioning

confidence: 99%

Biodegradable films and spray coatings as eco-friendly alternative to petro-chemical derived mulching films

Vox¹,

Santagata²,

Malinconico³

et al. 2013

J Agricult Engineer

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show abstract

“…Evaporation of water over a range of 60-120 ºC, suggested the involvement of dipole-dipole interactions amongst the -OH groups of the water molecules and the fatty acid molecules. There is also a high probability of dipole-dipole interactions amongst the water molecules and the alginate molecules [39]. Moisture content of the microparticles was calculated based on the differences in the change in enthalpies during the evaporation of water in the temperature range of 60 to 120 ºC.…”

Section: Thermal Studiesmentioning

confidence: 99%

Core–shell-type organogel–alginate hybrid microparticles: A controlled delivery vehicle

Sagiri

Singh

Banerjee

et al. 2015

Chemical Engineering Journal

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“…Now, the attention is being focussed on the development of novel biodegradable and costcompetitive pots or multiple nurseries. These pots are biocomposites whose continuous phase is characterized by biopolymers coming from renewable and available origin, such as polysaccharides Avella et al 2007) and whose solid phase, dispersed within the polymeric matrix, is represented by natural fillers and fibres coming from wastes of agro-food and textile processing industries (Mohanty et al 2000). Biodegradable plastics are an emerging generation of polymers.…”

Section: Introductionmentioning

confidence: 99%

Engineering and functional properties of biodegradable pellets developed from various agro-industrial wastes using extrusion technology

2015

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Different agro-industrial wastes were mixed with different plasticizers and extruded to form the pellets to be used further for development of biodegradable molded pots. Bulk density and macro-porosity are the important engineering properties used to determine the functional characteristics of the biodegradable pellets viz., expansion volume, water solubility, product colour, flowability and compactness. Significant differences in the functional properties of pellets with varying bulk densities (loose and tapped) and macro-porosities (loose, tapped) were observed. The observed mean bulk density of biodegradable pellets made from different formulations ranged between 0.213 and 0.560 g/ml for loose fill conditions and 0.248 to 0.604 g/ml for tapped fill conditions. Biodegradable pellets bear a good compaction for both loose and tapped fill methods. The mean macro-porosity of biodegradable pellets ranged between 1.19 and 54.48 % for loose fill condition and 0.29 to 53.35 % for tapped fill condition. Hausner ratio (HR) for biodegradable pellets varied from 1.026 to 1.328, indicating a good flowability of biodegradable pellets. Pearson's correlation between engineering properties and functional properties of biodegradable pellets revealed that from engineering properties functional properties can be predicted.

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Addition of glycerol plasticizer to seaweeds derived alginates: Influence of microstructure on chemical–physical properties

Cited by 93 publications

References 19 publications

Biodegradable films and spray coatings as eco-friendly alternative to petro-chemical derived mulching films

Biodegradable films and spray coatings as eco-friendly alternative to petro-chemical derived mulching films

Core–shell-type organogel–alginate hybrid microparticles: A controlled delivery vehicle

Engineering and functional properties of biodegradable pellets developed from various agro-industrial wastes using extrusion technology

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