Dept Textiles and plastics
Transcription
Dept Textiles and plastics
Industrial Research and Development at your service Industrial product development, process and materials development within textiles, polymers, ceramics and metals. Erik Nilsson PhD Senior researcher [email protected] Ownership of Swerea Textiles and plastics Erik Nilsson PhD Senior researcher R&D within the areas •Biocomposites and biopolymers •Recycling/re-use of plastics •Fiber development • Meltspinning • Meltblown • Solution spinning of biopolymers • Material development -Compounding • Incorporation of: Cellulose, CB, CNT, Graphene, Flame retardant, Nanoclay. •Testing and analysis Biocomposites Thermoplastic matrix + natural fibers (e.g. chair and pallet in WPC) Thermoplastic fibers + natural fibers (e.g. automotive interior panel) Equipment • Compounding • Injection moulding • Carding • Needling • Compression mouldning Coupling matrix to fiber Polypropylen + glasfiber WITHOUT Coupling agent No natural coupling between fiber and matrix. I.E. polyolefins Clariant, Additives for Natural Fiber Reinforced Plastics Coupling agent improves mechanical properties Polypropylen + glasfiber WITH coupling agent DuPont, Coupling agents for WPC Clariant, Additives for Natural Fiber Reinforced Plastics Example polypropylen - wood (Woodfiber Plastic Composite – WPC) Textile recycling • Mechanical recycling • Yarns, fabrics • Reinforcement in plastics • Plastic for injection moulding • Chemical depolymerization • Polyester fibers Comfort • Mechanical comfort and transportation of heat / moisture through different materials • Pressure distribution • Pressure sensors • Tactile properties • Thermal resistance • TOG, skin model, thermal doll • Breathability • Skin model, ”sweating” indentor Fiber development Technologies: – Solution (wet) spinning • Cellulose, biopolymers – textile fibers – Melt spinning • Temperature regulating fibers – for use in clothing • Conductive fibers – for smart textiles, heating textiles • Piezoelectric fibers – for sensors – Melt /Solution blown • Synthetic and biopolymers – for nonwowens Patent: WO 2009 031946 Inventor: Hagström et al. A conductive filler added to a polymer will form a conductive percolating network Conductive filler • • 100 nm Carbon black (CB) Graphite nano platelet (GNP) Matrix material • • Polypropylene (PP) High density polyethylene (HDPE) Dispersion and percolation Conductivity (log scale) % Conductive filler Electrical percolation behaviour High structured carbon black Structure Low structure CB Particle size Low structured carbon black Structure Particle size Demostrator – Heating textile 48 V • 40 x 25 cm woven fabric with bi component fibres 1.5 S/cm • DC 48 V => ~28-30 °C • DC 80 V => ~35-40 °C 80 V Coated piezoelectric yarn embroidered into a knitted glove Bending the index finger Tapping the thumb Clenching the fist Meltblown nonwoven Applications • • • • • • • • • Low viscosity polymer PP MFI 700 to1500 Fiber diameter down 1 µm 2-150 gram per sq m High surface area Hygiene products Air filter media Health care Clinical Sound absorbents • • • • • Geotextiles Insulation Furniture Garments Unexplored fields! Textile fibers from wood as alternatives to cotton Large volumes. The global fiber consumption within the textile industry is 80 million tons. Other annual plant fibers Dissolving pulp (like viscose, lyocell) corresponding to about 4 million tons (global annual production of pulp is about 180million tons) Synthetic fibers Large potential. With a volume of 700 billion tons, cellulose is the earths most abundant, natural organic chemical. Of the 40 billion tons cellulose that the environment renew every year, only 0.18 billion tons are used as raw material for further use. Cotton Cotton cannot meet the demand Competition for cultivated land used for food, animal feed and biofuels Poor working conditions Major environmental concerns, such as water scarcity, high use of fertilizer and hazardous pesticides, habitat loss and soil degradation There is an emerging interest in forest-based textile fibers; why? Bioeconomy – Identified societal challenge in Horizon 2020 From wood to fabric Liberation and purification of cellulose fiber Dissolution, shaping and regeneration of cellulose into continuous or staple fiber Spinning of yarn Weaving/knitting Solution spinning of biopolymers Wet spinning • Several flexible spinning lines • Equipment to dissolve polymers in different scales • Experience from using a wide range of cellulose solvents • Competence in cellulose chemistry. Applications • Textile fiber with cotton-like comfort • High tenacity fibers • Nonwoven • Carbon fiber precursor • Functionalized fibers Testbed – recycling plastic materials ”A platform for developing, testing, verification and demonstration of products, services, processes or organizational solutions aimed to increase materials recycling of plastics.” Status • Vinnova funded project. Partners • Ineos, Borealis, Volvo Cars, Trioplast, Stena Metall, Electrolux, Ragnsells, OFK, Rapid Granulator, Renova, Plastal, Dupont. • Chalmers, IKEM • Material recycling/re-use. • case studies, industrial partners. • Network activities. • Started early 2015. • Coordinated by Swerea IVF, Martin Strååt Swerea IVF is an independent research institute. We stand for confidentiality, objectivity and professionalism. Technical textiles Technical areas • • • Compression molded textiles/fibres Coating/adhesion/surface modifiction High performance fibers Application areas: • • • • • • Furnitures Protective clothing (UHP-Ultra High Pressure, fishery…) Automotive interior Climate protection in greenhouse Fire-protection wear Filter media Screen walls by Abstracta. Wall decorations by Offecct. Chair by Gubi. Manufacturer NORDIFA AB