A5075910557- Advanced Cellulose Research Studies
- Material Properties and Processing
- Textile materials and evaluations
- Natural Fiber Reinforced Composites
- Consumer Packaging Perceptions and Trends
- Organic Food and Agriculture
- Diverse academic and cultural studies
- Recycling and Waste Management Techniques
- Electrospun Nanofibers in Biomedical Applications
- Cellular and Composite Structures
- biodegradable polymer synthesis and properties
- Wood Treatment and Properties
- Additive Manufacturing and 3D Printing Technologies
- Pickering emulsions and particle stabilization
- Polymer Foaming and Composites
- Advanced Fiber Optic Sensors
- Nanocomposite Films for Food Packaging
- Biofuel production and bioconversion
- Research in Social Sciences
- Cultural Heritage Materials Analysis
- Environmental Impact and Sustainability
- Photonic Crystal and Fiber Optics
- Digital Communication and Language
- Dyeing and Modifying Textile Fibers
- Crafts, Textile, and Design
VTT Technical Research Centre of Finland
2018-2024
Norwegian University of Science and Technology
2010-2013
In this work we challenge some earlier theoretical ideas on the strength of lightweight fiber materials by analyzing an extensive set foam-formed networks. The experimental samples included various different material densities and types natural regenerated cellulose fibers. Characterization was performed macroscopic mechanical testing, supported simultaneous high-speed imaging local deformations inside a network. showed extremely heterogeneous deformation behavior sample, with both rapidly...
Foam technology enables the preparation of new fiber-based materials with reduced density and improved mechanical performances. By utilizing multi-scale structural features formed fiber network, it is possible to enhance elasticity lightweight cellulose under compressive loads. Sufficient strength achieved by optimally combining fibers fines different length-scales. Elasticity adding polymers that accumulate at joints, which help network structure recover after compression. This concept was...
Abstract Poly(lactic acid) (PLA)/kraft pulp fiber (30 wt%) composites were prepared with and without a coupling agent (epoxidized linseed oil, ELO, 1.5 by injection molding. The non‐annealed composite samples, along lean PLA, exposed to two hydro‐thermal conditions: cyclic 50% RH/90% RH at 23 50°C, both up 42 days. aging effects observed size exclusion chromatography, differential scanning calorimetry, dynamic tensile mechanical analysis, fracture surface imaging. ELO temporarily accelerated...
Abstract Thermoplastic nonwoven composites were produced with the air‐laying and foam‐forming processes from cellulosic plastic fibers. The two raw material combinations (1) PP/PE (fiber length 3 mm), (12 fluff pulp fibers (2 mm) (2) (3 fibers, viscose (10 mm). After forming, fibrous sheets (400 gsm) bonded heat pressing (145°C). effect of carrier medium, air or aqueous foam, on tensile impact properties sheet structure was explored. air‐laids differed foam‐laids by anisotropy, density, lack...
This paper reports experiments on silica coating formulations that are suitable for application as a thin pigment layer with foam technique web. To understand the foaming properties of nanosilica dispersions, critical micelle concentration, half-life time, and bubble size stability were determined three different agents. The results indicate measurement is useful characterization method purposes. Pilot trials done effects chosen agents studied nanosilica-coated paper. surface hydrophilicity...
Pulp fiber airlaid nonwovens were bonded with three binder formulations in a spray and foam process. The binders were: commercial acrylic dispersion binder, bio-containing binder; citric acid-carboxymethyl cellulose mixture (CACMC) (1:1 by-weight). solutions applied at same concentrations onto A4-size sheets (80 gsm) under vacuum 2-sided spraying 1-sided coating. sheet structure, dry wet tensile properties, total absorption capacity compared. application densified bulk the sheets, whereas...
Composting offers a potential sustainable end-of-life pathway for nonwoven products that may aerobically disintegrate and eventually biodegrade. Enhancing the biodegradation of nonwovens typically involves incorporating biobased biodegradable fibres. This study explores how web formation consolidation impact aerobic disintegration in composting. Laboratory-scale air-laid, foam-laid carded sheets (40, 60, 100 g/m 2 ) with 80 wt% viscose 20 polylactic acid (PLA) fibres were prepared thermally...
Abstract Solid fibreboard is used mainly in highly demanding packaging applications. One solid quality having six paper and paperboard layers, a thickness of 1.7 mm polyethylene coating was studied. Several material tests on liquid water vapour penetration were done to assess the environmental moisture sources that change content after lamination process. The in‐plane diffusion coefficient combined board determined based an integrated unsteady state transport equation sorption measurements....
We discuss a new mean-field theory to describe the compression behaviour of thick low-density fibre networks. The is based on idea that in very large systems, statistics free segment lengths causes stress-deformation be quantitatively predictable. theoretical ideas are supported by several different experimental characterisations. Firstly, we have carried out single-fibre buckling tests using hemp fibres, which indicate maximum level axial stress before deformation localization, after load...