Harnessing a byproduct from wastewater treatment to obtain improved starch/poly(vinyl alcohol) composites

Damian, Celina Maria; Ott, Cristina; Stan, Raluca; Hanganu, Anamaria; Trușcă, Roxana; Bãlãnucã, Brîndușa

doi:10.1016/j.carbpol.2019.115777

Cited by 4 publications

(2 citation statements)

References 34 publications

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“…For the blends plasticized with GLY, it is seen in Fig. 1 that the solubility increased with the presence of GLY, in comparison to that of the corresponding blend without GLY, as also shown by Damian et al [38] GLY is a small molecule and would be washed away as it is soluble in water. However, the mass loss as soluble material was greater than the 20% initially added GLY mass.…”

Section: Solubility In Watersupporting

confidence: 72%

Physico-Chemical, Mechanical and Morphological Properties of Biodegradable Films Based on Arrowroot Starch and Poly(vinyl alcohol)

Nascimento

Santos

Silva

et al. 2021

Journal of Macromolecular Science, Part B

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Biodegradable polymeric blends have been widely studied due to their potential of reducing pollution caused by non-biodegradable materials. The research described here describes a polymer blend that benefits both from the abundance of arrowroot starch (AS) and the good mechanical properties of poly(vinyl alcohol) (PVA). Glycerol (GLY) was used in different proportions as a plasticizer. The addition of GLY improved the mechanical properties of the blends, increasing the elongation at break up to 667%. On the other hand, the GLY addition adversely affected other properties, increasing the water vapor permeability (WVP), solubility and hydrophilic characteristics and reducing the thermal stability and the crystallinity index. The AS/PVA blend without GLY addition showed better physical-chemical properties, having strong chemical interaction between the two kinds of polymeric chains (according FTIR analysis) and a homogeneous morphology (SEM morphological analysis). In general, decreasing the AS content improved the mechanical and WVP properties, the film becoming less hydrophilic. In conclusion, the AS/PVA blends cast films, with or without GLY, are biodegradable materials suitable for packaging applications.

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Section: Solubility In Watersupporting

confidence: 72%

Physico-Chemical, Mechanical and Morphological Properties of Biodegradable Films Based on Arrowroot Starch and Poly(vinyl alcohol)

Nascimento

Santos

Silva

et al. 2021

Journal of Macromolecular Science, Part B

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“…Using an ultrasound bath. The final mixtures were casted into Teflon molds (10 mm wide, 2 mm thick, 20 mm long) and irradiated in the visible range (450–500 nm), 3 min 14 …”

Section: Methodsmentioning

confidence: 99%

Exploring the potential of inexpensive high oleic sunflower oil for new polymeric architectures

Bãlãnucã

Ott

Damian

et al. 2021

Polymers for Advanced Techs

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Bicomponent polymeric architectures were fabricated through visible‐light polymerization starting from methacrylated and PEGylated high oleic sunflower oil (HO‐SFO) monomers and compatible polyethylene glycol dimethacrylate (PEG‐DMA) capable of swelling in biological simulated fluid. Conversion of the methacryl moieties in the photo‐polymerization reactions was monitored by FTIR spectrometry and also gel fraction measurements. The amount of PEG‐DMA co‐reactant and PEG units grafted on the HO‐SFO backbone were found to directly influence the key properties of the oil‐based polymers. DSC measurements proved that higher content of PEG‐DMA (1:1wt, related to HO‐SFO monomer) influence the crystallinity degree, favoring also the increase of PBS absorption capacity. PEG chains from the HO‐SFO structure acts as mediator for the hydrophobic and hydrophilic components, influencing the system mobility, networks arrangement, affording the higher degree for PBS absorption (almost 70% after 50 days of immersion). For all the studied systems two‐phase absorption process was observed and assigned to the esters hydrolysis, yielding new –COOH and –OH groups, XPS and SEM confirming this hypothesis. Polymers degradation during PBS immersion conduce to the elimination of PEG oligomers and unreacted methacryl moieties from the fatty acids, by diffusion in the swelling medium, phenomenon supported by detectable architectural changes from the SEM images.

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Sustainable strategy for the synthesis of novel vegetable oil derived polymeric materials

Slabu,

Stan,

Miu

et al. 2024

Polymers for Advanced Techs

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This study reports a sustainable strategy to produce polymeric materials with convenient properties, employing principles close to green chemistry, starting from epoxy/methacrylate vegetable oil monomers. New bio‐based derivatives were obtained from the well‐known epoxidized linseed oil, reacted with a renewable reagent, undecylenic acid, using suitable synthesis parameters in heterogeneous catalysis. The undecylenic double bonds grafted on the linseed oil structure were then reacted, resulting epoxidized undecylenic acid‐linseed oil (monomer 1). Monomer 1 was further used as an intermediate to obtain methacrylic derivatives: monomer 2—methacrylate epoxidized undecylenic acid‐linseed oil (bearing both epoxy and methacrylic moieties) and monomer 3—methacrylate undecylenic acid‐linseed oil (bearing only methacrylic functionalities). These three monomers were employed in different eco‐friendly ultraviolet/visible light curing attempts, proving their ability to generate polymer networks in different reaction conditions. The resulting materials were investigated through different thermal and thermo‐mechanical assays, establishing their general properties. The influence of the undecylenic fragments, epoxy/methacrylate content and curing conditions were established. Gel fraction varied according to the initial precursor composition (62/87% for the epoxy‐based materials; 58/91% for the methacrylic‐based materials). A good elasticity was observed for the new materials (Tg ranging from 20 to 44°C), and a great thermal resistance also (thermal degradation temperatures of 400/453°C for the epoxy network and 382°C for the methacrylic one), in good agreement with other studied mono‐ or di‐functional polymer matrices.

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Harnessing a byproduct from wastewater treatment to obtain improved starch/poly(vinyl alcohol) composites

Cited by 4 publications

References 34 publications

Physico-Chemical, Mechanical and Morphological Properties of Biodegradable Films Based on Arrowroot Starch and Poly(vinyl alcohol)

Physico-Chemical, Mechanical and Morphological Properties of Biodegradable Films Based on Arrowroot Starch and Poly(vinyl alcohol)

Exploring the potential of inexpensive high oleic sunflower oil for new polymeric architectures

Sustainable strategy for the synthesis of novel vegetable oil derived polymeric materials

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