Wood plastic composites weathering: Effects of compatibilization on biodegradation in soil and fungal decay

Catto, André Luís; Montagna, Larissa Stieven; Almeida, Scheyla Hermann de; Silveira, Rosa Mara Borges da; Santana, Ruth Marlene Campomanes

doi:10.1016/j.ibiod.2015.12.026

Cited by 61 publications

(24 citation statements)

References 43 publications

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“…201312170002 (PROVIRON Belgium) and cellulose fibres type EFC 1000 (CF) (Rettenmeier & Sohne AG, Germany) were used. The polymeric matrix has a density of 1.2197 g/cm 3 and melt flow index of 3.63 g/10 min. (180°C/2.16 kg).…”

Section: Experimental Part Materials and Methodsmentioning

confidence: 99%

“…The melting temperature (T m ), melting enthalpy (∆H m ) and degree of crystallinity (X c ) were extracted from the DSC curves. The degree of crystallinity (X c ) of PHB composite was calculated using equation 3: (3) where: ∆H m is the melting enthalpy of the test samples (Jg -1 ) and ∆H m o is the enthalpy value for a theoretically 100 % crystalline PHB (146 Jg -1 ) [25].…”

Section: Biodegradability Assessment Using the Samples Burial In Soilmentioning

confidence: 99%

“…Biodegradation represents also the mineralization of materials as a result of the action of naturally-occurring microorganisms in the environment (fungi and bacteria). The biodegradation of polymers is caused, among other things, by microorganisms that colonize its surface forming biofilms that consist of cells enclosed in a polymeric matrix of their own origin, comprising proteins and polysaccharides [3]. Biofilms can also be seen as the aggregation of the microorganisms attached to the surface of an extracellular matrix [4].…”

mentioning

confidence: 99%

See 2 more Smart Citations

PHB/cellulose Fibres Composites Colonization and biodegradation behavior

Popa¹,

Râpă²,

Cornea³

et al. 2018

Mat.Plast.

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In this study, newly developed polymeric composites based on poly(3-hydroxybutyrate) (PHB), cellulose fibres (CF) and plasticizer (bis[2-(2-butoxyethoxy)ethyl] adipate) (DBEEA) were subjected both to microorganism�s action in controlled conditions, and to soil�s action by sample burial. The weight loss of PHB based composites at 60 days exposure were determined in comparison with neat PHB. The weight variation for PHB based composites buried in a natural soil at 45 days and 90 days was monitored. DSC-differential scanning calorimetry and SEM -scanning electron microscopy analysis were performed on the tested composites after 90 days of soil burial. It was found that the introduction of cellulose fibres into PHB leads to the increase of biodegradability of composites.

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Section: Experimental Part Materials and Methodsmentioning

confidence: 99%

Section: Biodegradability Assessment Using the Samples Burial In Soilmentioning

confidence: 99%

mentioning

confidence: 99%

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PHB/cellulose Fibres Composites Colonization and biodegradation behavior

Popa¹,

Râpă²,

Cornea³

et al. 2018

Mat.Plast.

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“…In the case of Tyromyces palustris attack, MCC concentration did not have a statistical effect on weight loss values but it did on moisture content values. The presence of plastic in WPC prevents moisture uptake, but fungal attack has emerged under high moisture conditions due to fungi degrade wood compounds [21,22]. Some researchers observed the effects of wood in HDPE composites on fungal susceptibility are enriched by soil test.…”

Section: Decay Resistance Of Samplesmentioning

confidence: 99%

Biological properties of nutshell and microcrystalline cellulose (MCC) filled high density polyethylene composites

Boran¹,

Tomak²,

Çavdar³

2016

Archives of Materials Science and Engineering

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Purpose: The composites based on natural fibre and wood can be destroyed by fungi attack, even the lignocellulosic materials were used as filler in hydrophobic thermoplastic matrix. The aim of this study was to investigate the effect of microcrystalline cellulose (MCC) and nutshell fibre content on decay resistance of natural fibre composites. Design/methodology/approach: Half of the composite samples were immersed in water for 60 days and then incubated by fungi to investigate the leaching effect on biological resistance. Furthermore, water absorption rate and thickness swelling of samples were determined during water immersing. For this purpose, total nine thermoplastic composites filled different MCC rate (5%, 10% and 15%) and nutshell content (30%) were produced. Decay test were conducted by using a white rot fungus-Trametes versicolor, and a brown rot fungus-Tyromyces palustris, according to EN 113 standard. Findings: Based on findings from this study, weight loss, water absorption rate and thickness swelling correlated with lignocellulosic content in composites. Samples exhibited less than 1% weight loss in decay test and excellent biological resistance against testing fungi. Research limitations/implications: Weight loss (%) and moisture content (%) values of MCC-nutshell HDPE composites after Tyromyces palustris and Trametes versicolor attack were found under 3% and 20%, respectively. Low weight loss values obtained in the study are supposed to be related with the low moisture content. Originality/value: There is not a study dealing with the decay resistance of WPCs produced by a combination of nutshell and MCC fibres. In addition, there is not a substantial study on the effects of MCC/plastic ratio for decay performance of WPCs contained nutshell after long-term leaching test.

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“…WPCs products were once considered impervious to the attack of living organisms, such as fungi, mould, algae, marine borer, and termites because the wood particles were assumed to completely be encapsulated by the thermoplastic resin, thereby providing effective protection against biological damage. This assumption was disproven by laboratory testing and practical applications (Defoirdt et al 2010;H'ng et al 2011;Segerholm et al 2012;Catto et al 2016). Major studies on WPCs have focused on polyolefins as a polymeric matrix.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Environmentally Friendly Plasticizer on the Bio-Durability of Wood Plastic Composites

Huang

et al. 2017

BioResources

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The influence of epoxidized soybean oil (ESO) plasticizer on the mould and algal resistances of wood plastic composites (WPCs) was studied using artificial accelerated tests. The macro-and micromorphology of the colonization of algae and mould on the surface and fracture morphology of the WPCs samples were observed by digital camera and scanning electron microscopy (SEM). The water absorption and thickness swelling rates of different WPCs specimens with various addition amounts of ESO were also tested. The results indicated that as more of the ESO was added, the mould or algal resistance became weaker, especially on the surfaces of the specimens, which became harshly colonized when the addition amount of ESO was beyond 15 phr. The colonization speed and intensity of the mould were higher than the algae at the same addition level of ESO and the same testing time. The hyphae and spores of mould, but not algae, were found on the inner fracture layers.

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Wood plastic composites weathering: Effects of compatibilization on biodegradation in soil and fungal decay

Cited by 61 publications

References 43 publications

PHB/cellulose Fibres Composites Colonization and biodegradation behavior

PHB/cellulose Fibres Composites Colonization and biodegradation behavior

Biological properties of nutshell and microcrystalline cellulose (MCC) filled high density polyethylene composites

The Influence of Environmentally Friendly Plasticizer on the Bio-Durability of Wood Plastic Composites

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