20 articles
Automated fiber placement
Automated fiber placement (AFP) is a composite manufacturing process where a machine lays narrow prepreg fiber tows under heat and pressure, used for aircraft fuselage panels, wing skins, and rocket tanks.
Borstar
Borstar is Borealis's proprietary process technology for making bimodal polyethylene and polypropylene, combining a supercritical-propane slurry loop reactor with a gas-phase reactor, first commercialized at Porvoo, Finland in 1995.
Coaxial electrospinning
Coaxial electrospinning is a modified form of electrospinning that extrudes two polymer liquids through concentric needles, drawn by an electric field into core–sheath nanofibers used for drug delivery.
Compatibilizer
A compatibilizer is a polymer additive, usually a block or graft copolymer, that improves immiscible polymer blends by lowering interfacial tension and strengthening adhesion between phases.
Electrospinning
Electrospinning, also called the electrospinning method, is a fiber fabrication technique that uses an electric field to draw a charged polymer solution or melt into fibers from micrometers down to nanometers.
Electrospraying
Electrospraying, also called electrospray, is a technique in which a strong electric field breaks a liquid at a capillary tip into fine charged droplets, down to submicron sizes.
Emulsion solvent diffusion method
The emulsion solvent diffusion method, also called emulsification-diffusion, is a technique for making polymeric nanoparticles and microparticles, in which solvent diffusion into water precipitates the polymer around a drug.
Emulsion templating
Emulsion templating is a materials-processing technique where emulsion droplets serve as sacrificial templates for pores; the droplets are removed after the surrounding phase solidifies, leaving a porous material.
Force spinning
Force spinning, also called centrifugal or rotary jet spinning, is a fiber fabrication method in which a rotating spinneret expels polymer into micro- and nanofibers far faster than electrospinning.
Hydrophilization
Hydrophilization is a surface treatment that converts a material's outermost layer into a water-attracting state, improving adhesion, printability, and biocompatibility; main methods include wet-chemical oxidation, flame treatment, and plasma.
Ioncell-F
Ioncell-F is a Lyocell-type fiber spinning process developed at Aalto University and the University of Helsinki that turns wood pulp and textile waste into strong cellulosic fibers.
Nonsolvent-induced phase separation
Nonsolvent-induced phase separation, also known as NIPS or wet-phase inversion, is a membrane fabrication process in which solvent-nonsolvent exchange demixes a cast polymer solution into a porous membrane.
Phase inversion
Phase inversion is a membrane fabrication method that converts a homogeneous polymer solution from liquid to solid by controlled demixing, producing the porous separation membranes behind most commercial products.
Plasma treatment (surface engineering)
Plasma treatment is a surface engineering method that exposes a material to ionized gas, altering only its outermost surface layers to improve wettability, adhesion, and biocompatibility.
Reactive extrusion
Reactive extrusion is a polymer processing method in which a twin-screw extruder acts as a continuous, solvent-free chemical reactor for polymerization, grafting, compatibilization, and controlled degradation of polymers.
Single-screw extruder
A single-screw extruder is a continuous machine with one rotating screw inside a heated barrel that conveys, melts, and pressurizes material, most often thermoplastic polymer, through a shaping die.
Solution blow spinning
Solution blow spinning, also called solution blowing or air jet spinning, is a fiber fabrication method that uses pressurized gas to draw polymer solutions into micro- and nanoscale fibers.
Twin-screw extruder
A twin-screw extruder is a continuous processing machine in which two parallel screws rotate in a shared barrel, conveying, melting, and mixing material toward a die.
Ultraviolet curing
Ultraviolet curing, or UV curing, is a polymerization method that hardens photosensitive resins, adhesives, coatings, and inks within seconds of UV irradiation, used industrially since the late 1950s.
Vacuum bagging
Vacuum bagging is a composite manufacturing technique in which a fiber-resin layup is sealed under a flexible plastic film and vacuum, drawing out trapped air and excess resin.