Biodegradation of poly(lactic acid)/chitosan stratified composites in presence of the Phanerochaete chrysosporium fungus

Stoleru, Elena; Hitruc, Elena Gabriela; Vasile, Cornelia; Oprică, Lăcrămioara

doi:10.1016/j.polymdegradstab.2017.06.023

Cited by 44 publications

(15 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using plasticizers or blending PLA with polymers that are more flexible can decrease the glass transition, favoring biodegradation [70,71]. A crystallinity increase was observed in chitosan loaded PLA films exposed to white root fungus, which mainly attack the amorphous regions, having higher flexibility of macromolecular chains [72]. PLA degradation starts by abiotic chemical hydrolysis and continues by enzymatic hydrolysis under microbial attack, which occurs preferably in the amorphous regions, and by biotic assimilation of degradation products [73,74].…”

Section: Biodegradability Of Polymer Composites With Natural Fillersmentioning

confidence: 99%

Environmental Degradation of Plastic Composites with Natural Fillers—A Review

Brebu¹

2020

Polymers

152

View full text Add to dashboard Cite

Polymer composites are widely used modern-day materials, specially designed to combine good mechanical properties and low density, resulting in a high tensile strength-to-weight ratio. However, materials for outdoor use suffer from the negative effects of environmental factors, loosing properties in various degrees. In particular, natural fillers (particulates or fibers) or components induce biodegradability in the otherwise bio inert matrix of usual commodity plastics. Here we present some aspects found in recent literature related to the effect of aggressive factors such as temperature, mechanical forces, solar radiation, humidity, and biological attack on the properties of plastic composites containing natural fillers.

show abstract

Section: Biodegradability Of Polymer Composites With Natural Fillersmentioning

confidence: 99%

Environmental Degradation of Plastic Composites with Natural Fillers—A Review

Brebu¹

2020

Polymers

152

View full text Add to dashboard Cite

show abstract

“…Detailed experimental conditions have been described in a previous paper [25]. Chaetomium globosum and Phanerochaete chrysosporium fungi purchased from the Institut Scientifique de Sante Publique, Belgium, preserved in the laboratory conditions have been used in this study.…”

Section: Fungal Materialsmentioning

confidence: 99%

“…It is well accepted [53] that the biodegradation of PLA is preceded by the chemical hydrolysis of ester bonds in the polymer, which is connected with the decrease of average molecular weight to the level accessible by the enzymatic systems of microorganisms action [38]. The FTIR spectra of PLA, PLA/R, PLA/PEG and PLA/PEG/R before and after being inoculated with Chaetomium globosum and Phanerochaete chrysosporium fungi are shown in Figure 8a, The general band assignments for PLA-based samples was done according to literature data [25,54,55] and are presented in Table 4. As revealed in our previous studies [29,30,56], neat PLA exhibits sharp bands assigned to vibrations of carbonyl group, νC=O, with a maximum at 1749 cm −1 (stretching) and at 1266 cm −1 (bending).…”

Section: Structural Changes-fourier-transform Infrared Spectroscopy (mentioning

confidence: 99%

“…The production of reactive oxygen species (ROS) by this fungus occurs in physiological conditions, as during the wood degradation. In our previous paper, Phanerochaete chrysosporium white rot fungus was tested for its ability to biodegrade poly(lactic acid)-based materials gamma irradiated or nitrogen plasma activated and chitosan-surface grafted [25]. The biodegradation of the PLA-based systems by Trichoderma viride fungus, in liquid medium and controlled laboratory conditions was also studied [26].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of the Chitosan and Rosemary Extract on Fungal Biodegradation of Some Plasticized PLA-Based Materials

Stoleru

Vasile²,

Oprică

et al. 2020

Polymers

Self Cite

View full text Add to dashboard Cite

The fungal degradation of the complex polymeric systems based on poly(lactic acid) (PLA) and natural bioactive compounds (chitosan and powdered rosemary alcoholic extract) was studied. Two fungal strains, Chaetomium globosum and Phanerochaete chrysosporium were tested. Both fungi characteristics and changes in morphology, structure and thermal properties were monitored. Biochemical parameters as superoxide dismutase, catalase, soluble protein and malondialdehyde have been determined at different time periods of fungal degradation. The fungi extracellular enzyme activities are slightly decreased in the case of composites containing bioactive compounds. The presence of natural compounds in the PLA-based polymeric system determines an acceleration of fungal degradation and probably the chemical hydrolysis, which further helps the attachment of fungi on the surface of polymeric samples. Significant decreases in average molecular mass of the polymeric samples were observed by fungi action; accompanied by structural changes, increase in crystallinity and decrease of thermal properties and the loss of the physical integrity and finally to degradation and integration of fungal degradation products into environmental medium. It was found that both fungi tested are efficient for PLA-based materials degradation, the most active from them being Chaetomium globosum fungus.

show abstract

“…More recently, we adjust the mechanical properties and degradation rate of PCL by blending biosourced poly(glycerol‐succinate) oligoesters . In addition, simple copolymeric or coated structure (such as polyethylene glycol (PEG)‐PCL), chitosan‐coated poly(L‐lactide), chitosan‐PCL block copolymer networks, P(TMC‐co‐LLA), and some other copolymers are also used to modify PCL or PLLA to improve the mechanical properties or degradation properties.…”

Section: Introductionmentioning

confidence: 99%

Influences of terminal POSS on crystallization and degradation behavior of PCL‐PLLA block copolymer

Yin

Yang

2018

Polymer Crystallization

View full text Add to dashboard Cite

Polyhedral Oligosilsesquioxane (POSS)‐terminated linear block biodegradable polyesters with highly tunable degradation rate and crystalline properties were synthesized. The influences of copolymer compositions and terminal functional groups on the crystallinity and biodegradability were systematically studied by X‐ray diffraction (XRD) and differential scanning calorimetry (DSC). Furthermore, by polarizing optical microscope, X‐ray photoelectron spectrometer, XRD, and DSC tests, the degradation processes both in natural environment and phosphate buffer saline were apparently revealed. Precisely, this work revealed that the crystalline behavior and degradation rate of PCL‐b‐PLLA films could be well controlled by copolymer compositions and terminal functional groups, which is conduced to guide the synthesis of degradable polymers with expected degradation properties and to design heat‐multiresponsive shape memory materials.

show abstract

Biodegradation of poly(lactic acid)/chitosan stratified composites in presence of the Phanerochaete chrysosporium fungus

Cited by 44 publications

References 32 publications

Environmental Degradation of Plastic Composites with Natural Fillers—A Review

Environmental Degradation of Plastic Composites with Natural Fillers—A Review

Influence of the Chitosan and Rosemary Extract on Fungal Biodegradation of Some Plasticized PLA-Based Materials

Influences of terminal POSS on crystallization and degradation behavior of PCL‐PLLA block copolymer

Contact Info

Product

Resources

About