Utilization of Waste Lignin and Hydrolysate From Chromium Tanned Waste in Blends of Hot-Melt Extruded PVA-Starch

Julinová, Markéta; Slavík, Roman; Vyoralová, Martina; Kalendová, Alena; Alexy, Pavol

doi:10.1007/s10924-017-1050-1

Cited by 11 publications

(12 citation statements)

References 47 publications

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“…Not only was the PVA crystallinity reduced, but also the melting point depression suggests strong interactions between the two polymers . Similar blends of PVA/thermoplastic starch (TPS)/lignin were used to adjust the biodegradability of thermoplastic biopolymer films . Selected compatible blends and processing methods are summarized in Table .…”

Section: Lignocellulosic Biomassmentioning

confidence: 99%

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Natural Polymers from Biomass Resources as Feedstocks for Thermoplastic Materials

Müller

Zollfrank

Schmid

2019

Macro Materials & Eng

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With the objective of a more sustainable circular economy, one long‐term goal is the utilization of renewable resources as feedstock for the production of polymer‐based materials. In order to successfully process such materials using existing industrial‐scale technologies or even recycling processes, the natural polymers must have thermoplastic properties. With only a few exceptions, natural polymers are not thermoplastic. However, chemical and physical modification techniques are able to induce thermoplasticity in natural polymers from biomass resources such as cellulose, lignin, and chitin. Modification techniques focus on masking the hydroxyl groups to disrupt dense hydrogen bonding and so enable polymer chain mobility upon heating. The introduction of long alkyl chains into the polymer backbone effectively improves the thermoplastic processing of natural polymers. With regard to polymer blending, chemical grafting and graft copolymerization are powerful tools for enhancing compatibility. For both chemical and physical modification, solvents such as ionic liquids and deep eutectic solvents are currently being explored for biomass and fiber processing and show promise for the future development of thermoplastic biopolymers. This review describes possible modifications, potential processing difficulties, and gives a summary of relevant studies described in the scientific literature.

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Section: Lignocellulosic Biomassmentioning

confidence: 99%

“…[131] Similar blends of PVA/thermoplastic starch (TPS)/lignin were used to adjust the biodegradability of thermoplastic biopolymer films. [132] Selected compatible blends and processing methods are summarized in Table 2.…”

Section: Approaches For Thermoplastic Processingmentioning

confidence: 99%

Natural Polymers from Biomass Resources as Feedstocks for Thermoplastic Materials

Müller

Zollfrank

Schmid

2019

Macro Materials & Eng

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“…where CODDISSOLVED is the concentration of the dissolved TPS or blend expressed as chemical oxidation demand (COD), and sCODSAMPLE is the experimental determination of the solid chemical oxygen demand of the TPS or blend (both in mg g -1 ) [22].…”

Section: Water Solubilitymentioning

confidence: 99%

“…In accordance with a previous work by us [22], the procedure for calculating the solid COD [23] of the TPS or blends (sCODBLENDS) involved the following: 2-3 mg of the sample (measured on a Mettler MX-5 microbalance, Toledo International Inc., USA) were transferred to test tubes with screw caps containing 2 mL of distilled water. Afterwards, they were digested (2 h, 150 °C) according to the international standard colourimetric method- ISO 15,705:2002 [24]; the small-scale sealed-tube approach was adopted to work out the chemical oxygen demand index.…”

Section: Water Solubilitymentioning

confidence: 99%

Effect of Different Fillers on the Biodegradation Rate of Thermoplastic Starch in Water and Soil Environments

et al. 2019

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This work investigates the effect of filler type on the rate of biodegradation of thermoplastic starchbased films in water and soil environments. The authors applied the casting method to create films of thermoplastic starch, based on waste paper, filled with clays or organic fillers. Since such materials made from cellulose tend to absorb water, we hydrophobized the surfaces of the filled thermoplastic starch samples. The structures of the blends were characterized by infrared spectroscopy, while atomic-force microscopy was applied to observe change in surface topography and the distribution of the filler. We also studied moisture resistance of the blends. Biodegradation tests revealed that surface topography, distribution of the filler and starch-to-filler interactions were non-critical to the rate and degree of biodegradation of the blends. The biodegradation rate of the blends was strongly affected by the environmental conditions (relative humidity 54%, 100%, respectively; temperature 25 °C, 37 °C, respectively). Under anaerobic conditions, it was the mixtures that biodegraded to the greatest extent, whereas the hydrophobized mixtures did so the least.

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“…The properties of polymeric matrices with sustainable origin, such as chitosan, gelatin, starch, soy protein, and whey protein isolate, can be improved by the use of lignin or lignin microparticles (Aadil, Prajapati, & Jha, 2016;Alzagameem et al, 2019;Julinová, Slavík, Vyoralová, Kalendová, & Alexy, 2018). Whey protein isolate (WPI) has the ability to form films, it is transparent and it has excellent oxygen permeability.…”

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confidence: 99%

Biopolymeric films based on whey protein isolate/lignin microparticles for waste recovery

Gomide

Oliveira

Luvizaro

et al. 2020

J Food Process Engineering

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Lignin is a source of phenolic compounds. It can be an excellent raw material for the production of films with whey protein isolate (WPI). The present study investigates WPI films with lignin microparticles (LMP). The structural, morphological, physical (thermal and mechanical analysis, water vapor barrier, color parameters, and transparency) properties, and the antioxidant properties were determined. The concentration of LMP were 0, 0.25, 0.50, and 0.75% (w/w). Structural analysis showed the addition of LMP to WPI‐based films did not change the film structure. A good dispersion of the microparticles is observed for the treatments containing 0.25 and 0.50% (w/w) LMP. In the concentrations of WPI and LMP used, an improvement in the thermal (increase of 13.46°C in Tg) and mechanical properties (35% more resistant) were observed, as well as higher temperatures of degradation and lower water vapor barrier (12 and 16% for 0.25 and 0.50%, w/w, LMP). The films containing LMP showed antioxidant potential, with higher values for 0.75% (w/w) of LMP.Practical ApplicationsThe Whey Protein Isolate is by‐product of the cheese industry and Lignin is a by‐product of the cellulose, paper, and ethanol biorefineries. The lignin improved the resistance of packaging to handling, providing longer use time for the packaging. These two polymers combined interesting characteristics for the development of new active packaging, with antioxidant action, capable of reducing food degradation and expanding the shelf life of foods.

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Utilization of Waste Lignin and Hydrolysate From Chromium Tanned Waste in Blends of Hot-Melt Extruded PVA-Starch

Cited by 11 publications

References 47 publications

Natural Polymers from Biomass Resources as Feedstocks for Thermoplastic Materials

Natural Polymers from Biomass Resources as Feedstocks for Thermoplastic Materials

Effect of Different Fillers on the Biodegradation Rate of Thermoplastic Starch in Water and Soil Environments

Biopolymeric films based on whey protein isolate/lignin microparticles for waste recovery

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