Biodegradability of polymer film based on low density polyethylene and cassava starch

Nguyen, Dang Mao; Vi, Thi Vi; Grillet, Anne‐Cécile; Thuc, Huy Ha; Thuc, Chi Nhan Ha

doi:10.1016/j.ibiod.2016.09.004

Cited by 101 publications

(48 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The process of biodegradation is affected by different factors, such as the nature of the polymer, film thickness and water solubility, soil conditions (moisture, pH, and microorganisms), and temperature. [53][54][55][56] The rapid biodegradability may be related to hydrophilicity and water solubility, in which the films presented on average 20% of solubility, which assists in a greater water absorption and activity, microorganism growth, and matrix disintegration during the process. During the biodegradation, the microorganisms present naturally in the soil degrade the material, associated to the breaking of the bonds present in the starch structure and glycerol leaching, which leads to weight loss and visible changes in the matrix.…”

Section: Biodegradability: Indoor Soil Burial Degradationmentioning

confidence: 99%

Synthesis of biodegradable films based on cassava starch containing free and nanoencapsulated β‐carotene

et al. 2018

View full text Add to dashboard Cite

β-Carotene may represent an excellent natural antioxidant, and nanoscale encapsulation may contribute to development of a new technique for addition of antioxidants in active packaging.The objective of this work was to develop active biodegradable films with addition of free β-carotene or β-carotene-loaded lipid-core nanocapsules and to evaluate the interaction with the polymeric matrix. The addition of free β-carotene led to a decrease in the mechanical properties of films, result of their hydrophobic character and less interaction with the matrix.β-Carotene nanocapsules caused the increase of colour intensity of films, elongation at rupture, and less light transmission, with the gradual increase according to increase in concentration. Films with β-carotene nanocapsules presented greater protection of sunflower oil, with lower formation of oxidation products. The lower stability of free antioxidant led to behavior similar to control film, with less oxidation protection. The addition of nanocapsules can provide better interaction with the structure, since the encapsulated carotenoid exhibits solubility in aqueous medium and present better distribution, without altering the rapid biodegradability and thermal stability of films. The results show that encapsulated bioactive compounds can be used as hydrophobic natural antioxidants and added in active biodegradable packages for maintaining food safety and extending the shelf life.

show abstract

Section: Biodegradability: Indoor Soil Burial Degradationmentioning

confidence: 99%

Synthesis of biodegradable films based on cassava starch containing free and nanoencapsulated β‐carotene

et al. 2018

View full text Add to dashboard Cite

show abstract

“…A key point to be investigated in these systems is whether the biodegradable component could be effectively biodegraded by the microorganisms under certain conditions, and whether the remaining polyolefinic phase could be even degraded (Chandra and Rustgi, 1998). Several research efforts were thus made in this direction, through the development of different LDPE/biopolymer blends, such as LDPE/wax Luyt, 2000, 2001), LDPE/starch (Nguyen et al, 2016;Datta and Halder, 2019) and LDPE/PLA (Bhasney et al, 2019) systems. It was demonstrated that the degradation of polyethylene can be accelerated by environmental factors such as temperature, UV irradiation or the action of microorganisms (Restrepo-Flórez et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Thermo-Mechanical Behavior and Hydrolytic Degradation of Linear Low Density Polyethylene/Poly(3-hydroxybutyrate) Blends

2020

View full text Add to dashboard Cite

In this work, a commercial linear low density polyethylene (LLDPE) utilized for packaging applications was melt compounded with different amounts (from 10 up to 50 wt. %) of poly(3-hydroxybutyrate) [P(3HB)], with the aim to evaluate the possibility to partially replace LLDPE with a biodegradable matrix obtained from renewable resources. The processability, microstructural, and thermo-mechanical behavior of the resulting blends was investigated. Melt flow index (MFI) values of the LLDPE matrix were not much affected until a P(3HB) content of 20 wt.%, while for higher P(3HB) concentrations an evident decrease of the viscosity was detected. Scanning electron microscope (SEM) observations on the blends highlighted that at limited P(3HB) concentrations the secondary phase was homogeneously dispersed in form of isolated domains, while at a P(3HB) content of 50 wt.% a continuous layered morphology could be detected. Thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FT-IR) did not evidence any chemical or physical interaction between the two polymer phases. Quasi-static tensile tests and dynamical mechanical analysis showed that the introduction of P(3HB) led to a pronounced stiffening effect, while the progressive drop of the yield and ultimate mechanical properties could be attributed to the weak interfacial adhesion and poor compatibility between the two matrices. The resistance to hydrolytic degradation of the LLDPE/P(3HB) blends was evaluated over a period of 100 days of immersion in water at 50 • C. It was observed that the weight variation and the decrease of the tensile properties due to the hydrolytic process on the biodegradable phase were evident only for a P3HB content of 50 wt.%. In conclusion, this work showed that the partial replacement of LLDPE with a biobased P(3HB) could lead to the development of an innovative blend with good processability and mechanical properties, until a P(3HB) amount of 20 wt.%.

show abstract

“…However, plastics made of solely LLDPE are, in general, non-biodegradable when disposed to the environment. Blending LLDPE with a polysaccharide-(starch-) based polymer has been reported to increase the biodegradation level of LLDPE (Nguyen et al, 2016). Cassava starch consists of amylose and amylopectin, in which the latter is significantly more brittle than the former due to its highly branched chemical structure.…”

Section: Introductionmentioning

confidence: 99%

“…The biodegradability of LLDPE/TPS composites was determined using burial method in a composting medium according to previously reported protocol (Dilfi et al, 2017;Nguyen et al, 2016;Oragwu, 2016). Nguyen et al (2016) reported that LDPE/starchbased bioplastics showed more biodegradation in a composting medium compared to in normal soil. The mass change, morphology, and tensile strength of the bioplastics were measured before and after burial tests.…”

Section: Introductionmentioning

confidence: 99%

Biodegradable plastics from linier low-density polyethylene and polysaccharide: The influence of polysaccharide and acetic acid

Nurhajati¹,

Pidhatika²,

Harjanto³

2019

MKKP

View full text Add to dashboard Cite

Global problems associated with conventional, non-biodegradable plastics have urged the society to use more ecofriendly biodegradable plastics. In this study, linear low-density polyethylene (LLDPE) was co-compounded with cassava-based thermoplastic starch (TPS) to prepare biodegradable plastics (i.e. plastics that can be degraded by microbes), in which three different LLDPE/TPS ratios were studied. Acetic acid was used to hydrolyze the polysaccharides by breaking the branched amylopectin that causes the TPS-containing composites brittle and stiff. The biodegradation properties of the LLDPE/TPS composites were determined by observing the level of microbial growth on the sample surface after incubation with potato dextrose agar medium that was inoculated with Penicillium sp. and Aspergillus niger. Burial test in a humid composting medium was also performed to validate the biodegradation properties. The mass change (%) was calculated in relative to the initial mass before burial test. The physical properties (tensile strength and elongation at break) of the bioplastics were determined using universal testing machine before and after burial treatment. The morphology of the sample surface was evaluated using scanning electron microscopy. The results showed that the microbial growth increases with increasing TPS content. Negative mass changes were observed on all samples that contain TPS, with increase in the magnitude with increasing TPS content. The tensile strength tends to increase in the first 28 days of burial period in a composting medium then decreases and plateaus, while the elongation at break decreases with increasing burial period. Moreover, samples that contain acetic acid showed less microbial attachment and less biodegradation compared to samples that does not contain acetic acid.

show abstract

Biodegradability of polymer film based on low density polyethylene and cassava starch

Cited by 101 publications

References 45 publications

Synthesis of biodegradable films based on cassava starch containing free and nanoencapsulated β‐carotene

Synthesis of biodegradable films based on cassava starch containing free and nanoencapsulated β‐carotene

Thermo-Mechanical Behavior and Hydrolytic Degradation of Linear Low Density Polyethylene/Poly(3-hydroxybutyrate) Blends

Biodegradable plastics from linier low-density polyethylene and polysaccharide: The influence of polysaccharide and acetic acid

Contact Info

Product

Resources

About