Preparação, caracterização e estudos de biodegradação de blendas à base de PDLLA e PVP

Paula, Eneida de; Mano, Valdir

doi:10.1590/s0100-40422012000600003

Cited by 11 publications

(6 citation statements)

References 17 publications

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“…Referring to the publication of de Paula et al, who state a higher rate of PVP/PLA system biodegradation [18], the biodegradation of only PLA is more probable. Apparently, pores remained (Figure 6b Removal of PVP was also visible with the naked eye, because the films lost transparency and their original yellow tinge, which is characteristic for materials prepared from PVP [29].…”

Section: Resultsmentioning

confidence: 99%

“…According to the de Paula's study et al [18], where a higher rate of biodegradation of PVP/PLA system was noticed, the biodegradation of PLA would be more likely, because of more accessible surface after the removing of the PVP portion. Unfortunately, we are unable to determine from this data whether PVP or PLA was actually decomposed.…”

Section: Discussionmentioning

confidence: 97%

“…The foils were left in the air to let solvent evaporate. Finally, they were dried in a dessicator until the constant weight [18]. In this way, films of PVP/PLA were prepared in the ratio of PVP to PLA: 0/100, 50/50, 100/0.…”

Section: Preparation Of Pvp/pla Blendsmentioning

confidence: 99%

“…It can be combined with substances such as starch [11], carboxymethylcellulose [12], polyvinylalcohol [10], caprolactone [13,14], chitosan [15], polyethyleneglycol [16] or polydimethylsiloxane [17]. The study by de Paula et al deals with polymer films prepared from PVP and polylactic acid (PLA) [18]; this material finds its application in medicine and in biotechnology. Results of this research point to considerable biodegradation of this polymer blend.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the aim of this paper is to study the biodegradability of PVP/PLA films based on de Paula's research [18] and the biodegradability of PVP/PLA system with addition of NMP, OP, AC and APhA [3].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

PVP Based Materials: Biodegradation in Different Environments

Vaňharová

Julinová

Slavík

2017

Ecological Chemistry and Engineering S

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The research deals with biodegradation of films prepared from polyvinylpyrrolidone and polylactic acid (PVP/PLA). Biodegradation of PVP/PLA films was supported by the following additives: 1-methyl-2-pyrrolidone, 1-octyl-2-pyrrolidone, acrylamide and N-acetyl-L-phenylalanine according to the previous study. The films were prepared by a solvent casting technique. Biodegradation was observed using the respirometric method in different environments. The films subjected to biodegradation were analyzed by scanning electron microscopy and Fourier transform infrared spectroscopy. It was found that the films are substantially degraded, but not in the biological way; PVP was quickly removed in presence of water because of its easy solubility. In contrast, this fact could support biodegradation of PLA, which becomes more available for microorganisms when PVP leaves PLA matrix.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 97%

Section: Preparation Of Pvp/pla Blendsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

PVP Based Materials: Biodegradation in Different Environments

Vaňharová

Julinová

Slavík

2017

Ecological Chemistry and Engineering S

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Morphology, mechanical properties, and biodegradability of all‐cellulose composite films from oil palm empty fruit bunch

2020

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Palm oil plantations are very important in that they supply vegetable oil globally. However, increased production of palm oil prompts the accumulation of large lignocelluloses residues in the form of oil palm empty fruit bunch (OPEFB). This study explored the advantages of using OPEFB in the production of all-cellulose composite (ACC) films. The isolation process of the raw OPEFB fiber was carried out using a chemical process to extract OPEFB nanocellulose. ACC films from OPEFB and microcrystalline cellulose (MCC) were prepared using a dimethylacetamide (DMAC) and lithium chloride solvent system whereby the partially dissolved cellulose was transformed into the matrix phase surrounding the remaining nondissolved fiber. ACC films with 1% (wt/vol) OPEFB and 3% (wt/vol) MCC were prepared and the effects of chemical treatment of the OPEFB cellulose on the mechanical properties, crystalline structure, morphology, moisture absorption and soil biodegradability of the ACC film were investigated. The tensile strength of the ACC film was tremendously improved by chemical treatment. For instance, when acetic acid was used to treat the nanocellulose, the resultant film showed 279% increment in tensile strength value. However, formic acid-treated films demonstrate greater moisture uptake and soil biodegradation rate. The findings could be related to the alterations of hydroxyl group composition in the nanocellulose and variation in dissolution rate of the nanocellulose during chemical treatment. K E Y W O R D S all-cellulose composite, biodegradability, ionic liquid, nanocellulose, oil palm empty fruit bunch 1 | INTRODUCTION Plastic film is the most commonly used material for packaging due to its aesthetic quality, low cost, handleability, flexibility, and lightweight. Plastic films used for domestic and food packaging are typically made from petroleum sources like polypropylene (PP), polystyrene (PS), and polyethylene (PE). Use of these materials has led to severe environmental issues. A way to reduce packaging environmental issues is by introducing natural ingredients into

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