8 results about "Polymer free" patented technology

The invention belongs to the field of integrated circuit electronic chemicals, and particularly relates to an etching solution for removing a polycrystalline silicon false gate, which mainly comprises quaternary ammonium hydroxide, alcohol, an organic solvent, an anisotropic etching weakening additive and water. The etching liquid is mainly used for removing polycrystalline silicon false gates in the semiconductor manufacturing process, and the liquid medicine has certain organic polymer cleaning capacity and can synchronize polymer residues formed after dry etching. After being treated by the liquid medicine, no polymer or polycrystalline silicon is left on the surface of the structure, and the liquid medicine has high stability and long service life.

The application discloses a data encryption and anti-counterfeiting method based on polymer free volume change. The data encryption method comprises the following steps: preparing a polymer film containing encrypted information through photopolymerization, using a reverse rigidochromic fluorescent molecular probe as a developer to decrypt the polymer film containing encrypted information, and reading information. Compared with existing encryption and anti-counterfeiting technologies, the data encryption and anti-counterfeiting technology based on polymer free volume change has the same element composition and elastic modulus in the information area and the background area, greatly reduces the risk of cracking data by using advanced instruments, and the multidimensional change of the pattern is not easy to be tampered with, and the method is suitable for the field of encryption and anti-counterfeiting technologies.

The invention discloses a high-hygroscopicity ionic polymer material as well as a preparation method and application thereof. The high-hygroscopicity ionic polymer material is prepared by polymerizing a hygroscopicity ionic liquid monomer and a chain polymer free radical and then adjusting the aperture. The high-hygroscopicity ionic polymer material can reach 1.65 g / g in moisture absorption within 12 hours at the normal temperature under the humidity of 90%. The hygroscopic ionic polymer has an adjustable porous structure and high-density hygroscopic ions in structure, has high hygroscopicity and good machinability in performance, and can be widely applied to the aspects of drying, dehumidification, adsorption and heat storage, seawater desalination, sewage treatment and the like.

Hard surface, namely floor coating compositions free of fluoro-surfactants and free of zinc cross-link agents are disclosed. More particularly, hard surface, namely floor coating compositions containing an organic polymer comprising (i) styrene or vinyl toluene and at least one monoethylenically unsaturated acid or anhydride, (ii) acrylic polymers or modified acrylic polymers, or (iii) combinations thereof as the floor coating material with a plasticizing agent, solvent and / or a coalescent and / or cosolvent, without the use of zinc cross-link agents and fluoro-surfactants are disclosed. The aqueous compositions and methods of use provide desired floor coating characteristics with enhanced sustainability profiles.

A method of connecting an optical element to a mount, the method including attaching a connector to an optical element with a first solder and heating the first solder with an ultrasonic heater to form a first soldering bond between the connector and the optical element, aligning the optical element within an inner opening of a mount, and attaching the connector to the mount with a second bond, wherein the first soldering bond is a polymer-free bond.

The application belongs to the technical field of hydrogel microneedles, and relates to a hydrogel microneedle and a preparation method thereof, and the preparation method comprises the following steps: placing a methacrylated chitosan solution in a centrifugal tube, adding a photoinitiator, vortexing and ultrasonicating until the photoinitiator is completely dissolved to obtain a hydrogel microneedle filling solution; and taking the hydrogel microneedle filling solution and injecting the hydrogel microneedle filling solution into a PDMS microneedle mold, centrifuging, irradiating with an ultraviolet lamp and drying.The hydrogel microneedle prepared from methacrylated chitosan has superior performance in wound closure, re-epithelialization and hair follicle formation, and the hydrogel microneedle is combined with a rhodioside drug depot to construct a transdermal drug delivery system, the drug delivery system has high drug loading and no polymer deposition, can efficiently transdermally deliver rhodioside, promotes wound closure and tissue remodeling, and provides a potential strategy for wound treatment.

The invention discloses a topological chemical conversion growth method and application of a two-dimensional vertical growth rare earth material Eu2SO2, and belongs to the technical field of two-dimensional rare earth materials and magnetic materials. Europium powder and sulfur powder are used for preparing a two-dimensional rare earth material, vertically growing Eu2O3 is generated from the europium powder and oxygen at a high temperature, an ideal topological framework is provided for Eu2SO2, topological chemical spontaneous reaction is carried out after the sulfur powder is introduced, and the vertically growing Eu2SO2 single crystal with high quality is synthesized. The stress effect applied to Eu2SO2 by the sapphire substrate step is effectively reduced by the vertical growth state, and polymer-free transfer is realized. The preparation method provided by the invention is high in controllability, the problems of pollution and defects caused by introduction of impurities and strain in the transfer process can be well solved, and the high-quality two-dimensional rare earth material with intrinsic performance can be obtained.

Hard surface, namely floor coating compositions free of fluoro-surfactants and free of zinc cross-link agents are disclosed. More particularly, hard surface, namely floor coating compositions containing an organic polymer comprising (i) styrene or vinyl toluene and at least one monoethylenically unsaturated acid or anhydride, (ii) acrylic polymers or modified acrylic polymers, or (iii) combinations thereof as the floor coating material with a plasticizing agent, solvent and / or a coalescent and / or cosolvent, without the use of zinc cross-link agents and fluoro-surfactants are disclosed. The aqueous compositions and methods of use provide desired floor coating characteristics with enhanced sustainability profiles.