Jonas Hartman

Neste Engineering Solutions · SCBU

The demand for biobased barrier packaging alternatives is constantly growing. Poly(lactic acid) (PLA)-based polymers are one of the most extensively studied biomass-derived synthetic polymers; however, they typically lack water-barrier properties. We synthesized a copolymer of d,l-lactic acid, 1,4-butanediol, and itaconic acid [poly(d,l-lactic acid...

A major enhancement of grease and water vapor barrier properties was accomplished with a 1–10 g/m2 coating of O-acetyl galactoglucomannan (GGM) ester or with GGM coatings applied as water dispersions on cartonboard. GGMs were esterified with phthalic and benzoic anhydrides, respectively. The novel phthalic esters of GGM (GGM-Ph) were characterized...

Enzymatically treated cellulose was dissolved in a NaOH/ZnO solvent system and mixed together with poly(ethylene-co-acrylic acid) (PE-co-AA) or poly(acrylamide-co-acrylic acid) (PAA-co-AA) polymers, in order to improve the properties of dissolved cellulose and to prepare homogeneous cellulose-based blends for films and coatings. The solution stage...

This paper demonstrates opportunities for wood-based xylan derivatives to be used in coating applications. A route for extraction and purification of white and pure xylan from bleached birch kraft pulp is described as a part of the production of high adsorption and high crystalline pulp. Derivatization of the xylan during the extraction step was al...

Packaging safety is a very broad topic covering the whole packaging value chain. Safety aspects arerecognized when packaging materials are selected for a certain purpose, when packaging materials areconverted into packages, when packages are filled and closed, when packages are distributed, whenthese are used at home and finally when recycled. In t...

When purchasing food products, consumers have to be confident that the products are safe and fresh. Most food products are packed and the product package should give all the necessary information and, at the same time, promote the product and the brand. In addition, new tendencies towards to new renewable and biodegradable packages that reduce the...

The need for biobased polymers is increasing. The raw materials from agricultural and forest resources are renewable and abundant in nature. Among forest-based biomass, hemicelluloses form a scarcely utilized but extensive material source. Over one million tons of hemicelluloses could be extracted annually in Finland from pulp or wood chips without...

Development of products made from renewable sources is considered to be a strategic research area by the international scientific community since it is generally accepted that the fossil fuels will be exhausted in the foreseeable future. Another related strategic area is the development of new bioactive and biocompatible polymers capable of exertin...

The objective of this study was to create oxygen barrier films based on the hemicellulose O-acetylgalactoglucomannan (AcGGM) that show high resistance toward moisture-rich conditions. We have applied Williamson benzylation, a classic derivatization method of carbohydrates, as well as two different methods for surface grafting, and, finally, laminat...

The aim of this study was to investigate the film-forming ability of the hemicellulose O-acetyl-galactoglucomannan (AcGGM) and to evaluate its potential as a barrier material. The polymer film was evaluated by measurement of its oxygen permeability (Ox-Tran® Mocon), thermal properties (differential scanning calorimetry), and dynamic mechanical prop...

Poly(ethyl glyoxylate) (PEtG), a new polyacetal, was synthesized via anionic polymerization in CH2Cl2. End-capping was achieved using phenyl isocyanate. Average molecular weights in the range of 9000 - 216 000 were obtained. 1H and 13C NMR characterization highlight the non-stereoregularity of PEtG. The polymer is quasi-atactic and the polymerizati...

International Workshop Safe Nanostructured Polymer Materials: Characterization and New Processing Technologies. Naples, Italy, 3-4 March 2011 , 69