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

Abstract

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.

Microalgae biopeptides applied in nanofibers for the development of active packaging

“…Campos et al [30] evaluated the thermal properties of extruded PCL films and reported that the T melting was 56.36 °C being in accordance with the values of this study. In addition, they report that the glass transition temperature of PCL is in the range of -60 °C.…”

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

“…In addition, some blends facilitate the biodegradation of the non-biodegradable component [22] or in some cases; the biodegradation is controlled by one of the components in the mixture, as already observed by some research groups [23,24] .…”

Biodegradation of additive PHBV/PP-co-PE films buried in soil

“…The soil used was collected from the campus of Rio Claro, SP, Brazil, rich in humus, without litter and leaves, sieved with a 2 mm mesh, and initially adjusted to have 60% of humidity [32] . The humidity was maintained by a water recipient placed under the bottle, allowing the water to rise through capillarity, described by Campos et al [33] and shown in Figure 1. The columns were kept at room temperature for 3 months and 6 months (March and November /2012).…”