Biodegradation of the Films of PP, PHBV and Its Blend in Soil

Gonçalves, S. P. C.; Martins-Franchetti, S. M.; Chinaglia, Dante Luís

doi:10.1007/s10924-009-0150-y

Cited by 41 publications

(37 citation statements)

References 20 publications

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“…Os homopolímeros em pó foram pesados (0,2 g no total) e colocados entre películas de teflon, obtendo filmes cerca de 100 µm de espessura [7] . As blendas foram obtidas a partir de 0,1 g de cada polímero.…”

Section: Preparo Dos Filmesunclassified

“…Isto indica que a biodegradação ocorre nas interfases de PP e PCL (nas áreas de contato entre os dois polímeros diferentes, regiões menos ordenadas), tal como visto em Gonçalves et al [7] .…”

Section: Calorimetria Exploratória Diferencial (Dsc)unclassified

“…Após os tratamentos, observou-se diminuição da cristalinidade do 1º pico (PCL) e aumento de cristalinidade no 2º pico (PP), sugerindo a degradação do PCL inclusive de finais de cadeias, na fase cristalina e reorganização das cadeias do PP [14] . Segundo Gonçalves et al [7] , o aumento de cristalinidade do PP pode ser causado devido a formação de novos cristais na fase amorfa ou a incorporação de moléculas em cristais pré existentes (Figura 4a e b). Essas mudanças ocorrem nas interfases (PP-PCL) da blenda heterogênea e são consideradas como parte do processo biodegradativo.…”

Section: Medidas De âNgulo De Contato Dos Filmes Tratados Em Coluna Dunclassified

“…É importante a mistura de um polímero sintético com um biodegradável para minimizar o efeito do descarte deste material na natureza. Este trabalho pretende contribuir para o desenvolvimento da área de biodegradação deste tipo de blenda e na redução do custo do PCL Além disso, existem poucos trabalhos de blendas de PP com outros polímeros, sendo que em um deles constatou-se que a separação de fases do polímero favorece a biodegradação [7] .…”

Section: Introductionunclassified

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Biodegradação de filmes de PP/PCL em solo e solo com chorume

2010

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Resumo: Filmes de blenda de poli(ε-caprolactona) (PCL) e polipropileno (PP) foram obtidos por moldagem por compressão. O estudo da biodegradação de filmes de blendas de PP/PCL em solo e solo com chorume foi obtido pela evolução de CO 2 , perda de massa, ângulo de contato, microscopia eletrônica de varredura (MEV) e calorimetria exploratória diferencial (DSC). As análises de evolução de CO 2 mostraram que a biodegradação da blenda de PP/PCL em solo com chorume foi maior que a dos homopolímeros, sugerindo que os polímeros na blenda são mais suscetíveis à degradação, o que se deve à não interação entre PP e PCL. Os resultados também mostraram que os microrganismos do solo com chorume provocaram uma erosão superficial. Verificou-se que a biodegradação do PCL é inibida pelos microrganismos do chorume adicionados no solo. Palavras-chave: Polímeros sintéticos, polímeros biodegradáveis, solo, polipropileno, poli(caprolactona). Study of Biodegradation of PP/PCL Films in Soil and Soil with Leachate LandfillAbstract: Blend films of polycaprolactone (PCL) and polypropylene (PP) have been obtained by melt-pressing of both components. The biodegradation of PP/PCL blend films in soil and soil with leachate landfill has been assessed with measurements of evolution of CO 2 , weight loss, contact angle, scanning electronic microscopy (SEM) and differential scanning calorimetry (DSC). The respirometric tests showed that the PP/PCL biodegradation in the soil with leachate was higher than the homopolymers, suggesting that the polymers in the blend are more susceptible to biodegradation owing to the lack of interaction between PP and PCL. The results also showed that biodegradation due to microorganisms in the soil with leachate occurred by surface erosion. It was found that the PCL biodegradation is inhibited by the leachate microorganisms added in the soil.

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Section: Preparo Dos Filmesunclassified

Section: Calorimetria Exploratória Diferencial (Dsc)unclassified

Section: Medidas De âNgulo De Contato Dos Filmes Tratados Em Coluna Dunclassified

Section: Introductionunclassified

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Biodegradação de filmes de PP/PCL em solo e solo com chorume

2010

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“…Furthermore, in a study of poly (ε-caprolactone (PCL) and cellulose acetate blends, it was observed that the higher the PCL percentage present in the formulation, the greater is the degradation rate, due to the fact of the PCL morphology, containing spherulites and roughness, which facilitate the microbial activity and water absorption [28] .…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of films of low density polyethylene (LDPE), poly(hydroxibutyrate-co-valerate) (PHBV), and LDPE/PHBV (70/30) blend with Paecilomyces variotii

2015

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SbstractThe increased consumption of plastics in the world has been a subject of great concern and special attention by the scientific community. The aim is to promote development of materials that are biodegradable in a shorter time upon disposal in the environment. The most used synthetic plastics are difficult to biodegrade because they are made of long hydrocarbon chains, such as polyethylene (PE), polypropylene (PP), poly(vinyl chloride) (PVC), which are hydrophobic and resistant to the action of microbial enzymes. The use of alternative materials (natural polyesters) can minimize the harm to dumps and landfills upon their disposal, because they are susceptible to the action of microorganisms. In this study we evaluated the biodegradation/biodeterioration of PHBV (poly(3-hydroxybutyrate-co-hydroxyvalerate) films, LDPE (low density polyethylene) and the blend of LDPE/PHBV (70/30) by the fungus Paecilomyces variotii, using different methods: optical microscopy (OM), scanning electronic microscopy (SEM) and Fourier Transform Infrared spectroscopy (FTIR).

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Biodegradability of PP/PHBV (70/30) Blend Films

Gonçalves

Franchetti

2013

Adv Polym Technol

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This study aimed to investigate the biodegradation of polypropylene/poly(hydroxybutyrate-co-hydroxyvalerate) (PP/PHBV) blend (70/30, w/w) films in soil, monitoring the evolution of CO 2 using the respirometric method. The polymeric films were incubated at 28 • C ± 2 • C for 180 days in biometer flasks, and the sequence of biodegradation percentage was PP/PHBV (70/30) > PP, that is, 15% and 0%, respectively. Fourier transform infrared spectroscopy and X-ray diffraction measurements showed that biodegradation occurs in the blend PP/PHBV interphases. Preferentially, the microbial action occurs in the fraction of the biodegradable polymer (PHBV), and it influences the PP fraction morphology, which showed some significant changes in the monomer unit sequences and the organization of the chains. C

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Biodegradation of the Films of PP, PHBV and Its Blend in Soil

Cited by 41 publications

References 20 publications

Biodegradação de filmes de PP/PCL em solo e solo com chorume

Biodegradação de filmes de PP/PCL em solo e solo com chorume

Biodegradation of films of low density polyethylene (LDPE), poly(hydroxibutyrate-co-valerate) (PHBV), and LDPE/PHBV (70/30) blend with Paecilomyces variotii

Biodegradability of PP/PHBV (70/30) Blend Films

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