Assessing biodegradability of plastics based on poly(vinyl alcohol) and protein wastes

Hoffmann, Jaromír; Řezníčková, I.; Kozáková, Jarmila; Růžička, Jan; Alexy, Pavol; Bakoš, Dušan; Precnerová, Lenka

doi:10.1016/s0141-3910(02)00367-1

Cited by 57 publications

(37 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This reveals that the easily degradable component (WP) is consumed preferentially by microorganisms. Similar results were reported by Hoffmann et al, 11 who studied the biological degradability of PVA films containing protein hydrolysate and glycerol.…”

Section: Biodegradationsupporting

confidence: 89%

“…Generally, significant levels of biodegradation are reached only in the presence of acclimated (adapted) PVA-degrading microorganisms. 11,23 In our studies, unadapted activated sludge from a wastewater treatment plant was used as an inoculum. The absence of an acclimation time, during which the required enzymatic systems could be developed within the microorganisms that are able to degrade PVA, prolongs the total time of biodegradation.…”

Section: Biodegradationmentioning

confidence: 99%

See 1 more Smart Citation

Environmentally friendly biocomposites based on waste of the dairy industry and poly(vinyl alcohol)

Sedlařík

Saha

Kuřitka

et al. 2007

J of Applied Polymer Sci

View full text Add to dashboard Cite

Environmentally friendly polymeric biocomposites based on whey powder, a waste material of the dairy industry, and fully or partially hydrolyzed poly (vinyl alcohol) were prepared and characterized with optical microscopy, Fourier transform infrared spectroscopy, differential scanning calorimetry, and stress-strain analysis, and their biodegradation was evaluated with the modified Zahn-Wellens method and the spectrophotometric determination of poly(vinyl alcohol). In addition, the ability of the biocomposites to absorb moisture and its consequent influence on the mechanical properties were investigated under different storage conditions. The structural differences of the two types of poly(vinyl alcohol) matrices had a significant effect on all the mentioned characteristics. Possible molecular interactions between the polymer matrix and modifier, due to hydrogen bonding, were also examined. First-order kinetics were applied for the biodegradation data. The two-phase character of the biodegradation was shown. The results indicated that whey powder is suitable for the modification of polymers, and this is important for the production of biodegradable polymer materials and the consequent reduction of the environmental load.

show abstract

Section: Biodegradationsupporting

confidence: 89%

Section: Biodegradationmentioning

confidence: 99%

Environmentally friendly biocomposites based on waste of the dairy industry and poly(vinyl alcohol)

Sedlařík

Saha

Kuřitka

et al. 2007

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Polyvinyl alcohol is water soluble and a frequently used component of biodegradable polymer compounds. [12] In this paper, we present the synthesis and properties of ZnO powders and explore the possibility that ZnO in form of nanoparticles which could be dispersed into polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of ZnO – polymer nanocomposites

et al. 2008

View full text Add to dashboard Cite

The introduction of inorganic nanomaterials into polymer matrix has resulted in polymer nanostructured materials exhibiting multi-functional, high performance polymer characteristics beyond what traditional polymer composites possess. Multi-functional features attributable to polymer nanocomposites consist of improved moisture resistance, antibacterial and fungal properties. Zinc oxide powders was prepared via coprecipitation and used as inorganic materials; polyvinylalcohole was used as polymer matrix. The technical approach involves the introduction of nanoparticles into polymer matrix whereby nanoparticles has antibacterial characteristics and enhanced inclusion into the polymer matrix. The objectives of this paper are to summarize our research activities in: (a) developing processes to disperse nanomaterials (undoped and doped zinc oxide powders) in the polymers matrix, (b) using optical microscopy and scanning electron microscopy (SEM) techniques to characterize polymer matrix structures, (c) studying structure-property relationship of these types of new materials, and (d) evaluating the antibacterial performance of these materials for different applications. The results also show that the ZnO nanoparticles were uniformly dispersed in the polymer matrix and the particles remained their original size (20 -150 nm) before incorporation into the polymer matrix.

show abstract

“…[37,38] Therefore, aerobic test methods for the evaluation of the ultimate, aerobic biodegradability, by determining the oxygen demand in a closed respirometer or by analysis of released carbon dioxide, have been adopted. [39,40] Tkaczyk et al [5] researched the biodegradability of SPI and SPI composites in soil-based respirometric systems. Lodha and Netravali [6] reported that the weight loss of SPI resin was 93.8% after 21 d incubation in compost medium.…”

Section: Biodegradabilitymentioning

confidence: 99%

A New Network Composite Material Based on Soy Dreg Modified with Polyurethane Prepolymer

Chen

Zhang

Deng

et al. 2007

Macro Materials & Eng

View full text Add to dashboard Cite

A series of biodegradable, soy‐protein‐based, composite materials was prepared by introducing castor‐oil‐based polyurethane prepolymer (PUP) into soy dreg (SD) without the addition of plasticizers, via extrusion and a compression‐molding process. The effects of the NCO/OH molar ratio and the PUP content on the structure and properties of the resulting materials were studied by Fourier‐transform infrared spectroscopy, scanning electron microscopy, differential scanning calorimetry, dynamic mechanical thermal analysis, tensile testing, swelling experiments, and biodegradability testing. The results revealed that the NCO group in the PUP played a vital role in improving the compatibility and elasticity, as a result of the formation of a cross‐linking network structure with the NH2, NH, and OH groups in SD containing protein and cellulose. Increasing the NCO/OH molar ratio to 2.0 resulted in an enhancement of the degree of cross‐linking, leading to a higher tensile strength (24 MPa), glass‐transition temperature (52 °C) and water‐resistivity of the composite materials. The unreacted SD also served as a filler in the cross‐linked networks and enhanced the tensile strength of the composites. The biodegradation testing showed that the composites exhibited biodegradability under the condition of fungus culture.magnified image

show abstract

Assessing biodegradability of plastics based on poly(vinyl alcohol) and protein wastes

Cited by 57 publications

References 21 publications

Environmentally friendly biocomposites based on waste of the dairy industry and poly(vinyl alcohol)

Environmentally friendly biocomposites based on waste of the dairy industry and poly(vinyl alcohol)

Synthesis and characterization of ZnO – polymer nanocomposites

A New Network Composite Material Based on Soy Dreg Modified with Polyurethane Prepolymer

Contact Info

Product

Resources

About