A5051822309- Semiconductor materials and devices
- Advanced Cellulose Research Studies
- Material Properties and Processing
- Copper Interconnects and Reliability
- Nanocomposite Films for Food Packaging
- Fuel Cells and Related Materials
- Surface Modification and Superhydrophobicity
- Consumer Packaging Perceptions and Trends
- Electrocatalysts for Energy Conversion
- Catalytic Processes in Materials Science
- biodegradable polymer synthesis and properties
- Electrospun Nanofibers in Biomedical Applications
- Material Properties and Applications
- Tribology and Wear Analysis
- Metal and Thin Film Mechanics
- Recycling and Waste Management Techniques
- Electronic and Structural Properties of Oxides
- ZnO doping and properties
- Microplastics and Plastic Pollution
- Catalysis and Hydrodesulfurization Studies
- Synthesis and properties of polymers
- 3D IC and TSV technologies
- Lignin and Wood Chemistry
- Electronic Packaging and Soldering Technologies
- Advanced Chemical Sensor Technologies
VTT Technical Research Centre of Finland
2012-2022
Tieto (Finland)
2021
Biocom
1999-2018
Keskuslaboratorio
2007-2016
Tampere University
2000-2006
This review covers the recent developments in field of biobased packaging materials. Special emphasis is placed on barrier properties, which are crucial terms food packaging. The state-of-the-art several biopolymers including pectin, starch, chitosan, xylan, galactoglucomannan, lignin and cellulose nanofibrils discussed. As most cases related properties single layer biopolymer films inadequate, thin film coatings, such as sol-gel ALD (atomic deposition), well multilayer coatings also briefly touched.
ABSTRACT A single biopolymer film rarely has a competitive edge against synthetic films. One solution is to combine several layers with different properties into multilayer structures. In this way, for example, the barrier of bio‐based materials can be improved. study, films are produced by combining three techniques/materials: 1) dispersion coating (cellulose nanofibrils, CNF), 2) atomic layer deposition (Al 2 O 3 ; aluminum oxide), and 3) extrusion (polyglycolic acid, PGA). Especially CNF...
ABSTRACT The aim of this study was to evaluate a thin, TEMPO‐oxidized (2,2,6,6‐tetramethylpiperidine‐1‐oxyl–mediated oxidation) cellulose nanofibril (CNF) coating as barrier layer in multilayer packaging films together with biobased polyethylenes. purpose also explore the possible interactions between food products and films, feasibility these for dry foods. CNF provided an oxygen suitable both demanding modified atmosphere (MAP). MAP pouches made retained their shape protected ground...
Abstract Polymer composites with nanocellulose as the reinforcing agent often lack good compatibility between two components. In this study, we have combined cellulose nanofibrils (CNFs) and nanocrystals (CNCs) in different ratios to create all-cellulose films consisting of entirely discrete objects that complement each other. Then further, by applying controlled dissolution concept were able defined optical patterns on films. The 50% CNCs showed equivalent mechanical barrier properties when...
ABSTRACT The aim of this study was to demonstrate mechanical recycling low density polyethylene (LDPE) films coated with a thin layer cellulose nanofibrils (CNFs). CNF acts as an effective barrier against oxygen and mineral oil residues. Two different grades were tested, both applied onto plasma activated LDPE film using pilot coating line. shredded the help liquid nitrogen, compacted compounded virgin compatibilizer, processed into cast injection molded test specimens. coatings completely...
Abstract The aim of this study was to evaluate the properties polymer dispersions prepared from hydrophobic monomers as barrier coatings. These were produced using a new emulsion polymerization process involving cyclodextrin phase‐transport catalyst. Conventional techniques are not applicable due low water solubility monomers, such lauryl and stearyl (meth)‐acrylates. experimental polymers showed improvements in vapor barriers, result incorporation monomers. could be further improved with...
Abstract The effect of heat treatment on the gas barrier polymer‐coated board further coated with an Al 2 O 3 layer by atomic deposition (ALD) was studied. Heat below melting point polymer followed quenching at room temperature used for polylactide‐coated [B(PLA)], while over‐the‐melting‐point utilized low‐density polyethylene‐coated [B(PE)] or in liquid nitrogen. B(PLA) and B(PE) improved water vapor barrier. However, because changes morphology, nitrogen impaired same No improvement oxygen...
Abstract Some paper and paperboard grades require strength also when rewetted. The purpose of this study was to investigate the impact web forming method, different foaming agents, polyamideamine-epichlorohydrin (PAE) wet resin, retention aids on development hand sheets. Only a slight, if any, improvement in dry tensile due PAE resin observed. improved water-laid sheets, systems had minor but positive impact. Although lower at given addition levels, trend similar with sheets foam-laid an...
Feathers, an industrial by-product, are a valuable source of keratin that could be used, for example, in the preparation films biomedical and packaging applications. However, utilisation feather requires scalable processes to convert feathers into feasible stream. This paper shows how deep eutectic solvent (DES) fractionated converted strong films. In DES fractionation process, two fractions with different molecular weights were obtained. The made high weight fraction had better mechanical...