50results about "Monocomponent polycarbonates artificial filament" patented technology

A reduced density article of manufacture, and process for making same, made from a thermoplastic polycarbonate composition. The reduced density article of manufacture has (1) a certain density and (2) a certain micro structure containing from 1% to 20% by volume of voids wherein at least 80% of the voids are high aspect voids and less than 20% of the voids are spherical voids with a diameter of 10 to 100 microns. The polycarbonate thermoplastic composition comprises at least 50 mole % of a certain bisphenol A. The reduced density article of manufacture is made by a monofilament additive manufacturing technique.

Nanofibers are formed using electrospray deposition from microfluidic source. The source is brought close to a surface, and scanned in one embodiment to form oriented or patterned fibers. In one embodiment, the surface has features, such as trenches on a silicon wafer. In further embodiments, the surface is rotated to form patterned nanofibers, such as polymer nanofibers. The nanofibers may be used as a mask to create features, and as a sacrificial layer to create nanochannels.

The invention provides a preparation method of an adhesive material. The method comprises the following steps: using polymer to perform electrostatic spinning, collecting fibers with a turntable or cylinder to obtain oriented polymer fibers; bundling up the oriented polymer fibers to obtain an oriented polymer fiber bundle; fixing one end of the oriented polymer fiber bundle on a substrate, and forming a plane on the other end; and etching the planar end of the oriented polymer fiber bundle to form superfine fibers and obtain the adhesive material. In the preparation method in the invention, the electrostatic spinning method is adopted to prepare the oriented polymer fibers and treatments such as bundling, fixing, etching and the like are performed on the oriented polymer fibers to obtain the adhesive material with the structure which is similar to the feet of the gecko. The method provided by the invention has a simple process and mild conditions and is suitable for industrial production. In addition, the adhesive material prepared by the method in the invention has good binding performance.

The present invention relates to a preparation method for regularized static electricity spinning hollow fiber, and the method comprises the procedures that: firstly, high molecular compound is dissolved in good solvent to be made into uniform solution; secondly, poor solvent is added to be dispensed into spinning raw liquid, and the volume ratio of the good solvent and the poor solvent is 10 / 1 to 1 / 3; thirdly, the spinning raw liquid is added into a container, is controlled and extruded by a micro-syringe pump, a jet opening is connected with a high voltage positive pole, a grounding microelectrode with the removable area of 0 to 100 mm 2 is taken as a negative pole, various parameters of static electricity spinning are adjusted, and the spinning raw liquid carries on the static electricity spinning; fourthly, the grounding microelectrode backwards and continuously moves, and a continuous regularized static electricity spinning hollow fiber bundle is obtained; fifthly, the continuous hollow fiber bundle obtains the regularized static electricity spinning hollow fiber through winding and collecting. The preparation method provided by the present invention is simple and feasible, and the obtained static electricity spinning hollow fiber has the potential application and the prospect in the fields such as nanowire devices, filtering materials, and composite reinforcing materials, etc.