摘要:
The present disclosure provides a method for producing a cell-culturing polyvinyl alcohol-based nanofiber structure, the method comprising: electrospinning an electrospun solution to form a nanofiber mat, wherein the electrospun solution contains polyvinyl alcohol (PVA), polyacrylic acid (PA) and glutaraldehyde (GA); crosslinking the nanofiber mat via a hydrochloric acid (HCl) vapor treatment; and treating the crosslinked nanofiber mat with dimethylformamide (DMF) solvent to crystallize the nanofiber mat.
摘要:
A virus inactivating sheet is provided that can inactivate viruses adhering thereto even in the presence of lipids and proteins regardless of whether or not the viruses have an envelope. The virus inactivating sheet can inactivate viruses adhering thereto and includes a sheet body, and monovalent copper compound fine particles and/or iodide fine particles that are held by the sheet body. The virus inactivating sheet can inactivate various viruses. These viruses can be inactivated even in the presence of lipids and proteins.
摘要:
The invention relates to the use of subfluorinated carbons as a solid lubricant. Said subfluorinated carbons simultaneously contain fluorinated carbon domains with a (CF)n structure and non-fluorinated graphitic carbon domains, in powder form, as a solid lubricant. The invention can be used in the field of solid lubricants.
摘要:
It is intended to provide a method of producing a hollow construct, which may be in various shapes such as a fiber or a film as well as in various sizes and has chemical resistance, made of a fluorinated hydrocarbon polymer, a fluorinated carbon polymer or a polymer carrying a nitrogen-containing group, a silicon-containing group, an oxygen-containing group, a phosphorus-containing group or a sulfur-containing group having been introduced into the above-described polymer; and a hollow construct obtained by this method. The method of producing a hollow construct as described above is characterized by comprising the fluorination step wherein a construct made of a hydrocarbon polymer or a polymer carrying a nitrogen-containing group, a silicon-containing group, an oxygen-containing group, a phosphorus-containing group or a sulfur-containing group having been introduced into the above-described polymer is brought into contact with a treating gas containing fluorine under definite conditions and thus the treating gas is allowed to penetrate from the outer surface of the construct toward the inside thereof to thereby fluorinate the construct excluding the core part, and the removal step wherein the core part having been not fluorinated as described above is removed.
摘要:
The invention provides a process for the activation by oxyfluorination of at least part of a surface of a solid, which process includes exposing, under selected conditions of temperature and pressure and for a selected reaction time, at least part of the surface of the material of the solid to an oxfluorinating atmosphere. The oxyfluorinating atmosphere is a gas/vapor mixture which includes at least one fluorine-containing gas which reacts with the material of the exposed surface, at least one oxygen-containing gas which reacts with the material of the exposed surface, and water vapor. The gases in the oxyfluorinating atmosphere act to oxyfluorinate the exposed surface, thereby to activate it, and the water vapor acts to enhance the activation.
摘要:
The invention provides a process for the activation by oxyfluorination of at least part of a surface of a solid, which process includes exposing, under selected conditions of temperature and pressure and for a selected reaction time, at least part of the surface of the material of the solid to an oxfluorinating atmosphere. The oxyfluorinating atmosphere is a gas/vapour mixture which includes at least one fluorine-containing gas which reacts with the material of the exposed surface, at least one oxygen-containing gas which reacts with the material of the exposed surface, and water vapour. The gases in the oxyfluorinating atmosphere act to oxyfluorinate the exposed surface, thereby to activate it, and the water vapour acts to enhance the activation.
摘要:
In a preferred embodiment, the present process involves subjecting a fabric having splittable conjugate yarns both to an acidic treatment and to a basic treatment, each of which erodes a portion of the components of the conjugate yarns. The acid treatment, given certain reaction kinetics, removes a portion of the polyamide element of the conjugate filament. The basic treatment has a similar effect on the polyester element of the conjugate filament, making it more hydrophilic. The at least partial removal of the polyamide component, coupled with the increased hydrophilicity of the polyester component, results in a fabric having enhanced absorptive properties. In an alternate embodiment, treatments with only acid or only basic solution may be employed.
摘要:
A surface-modified fibrillated fiber composition is disclosed herein which comprises polyacrylonitrile homopolymer or copolymer and a surface of pendant N-haloamide groups. Also disclosed is a process for the production of said composition.
摘要:
AN IMPROVED PROCESS IS PROVIDED FOR THE FORMATION OF FIBROUS MATERIALS OF ENHANCED THERMAL STABILITY DERIVED FROM ACRYLIC POLYMERS CONSISTING PRIMARILY OF RECURRING ACRYLONITRILE UNITS. A MINOR QUANTITY OF A LEWIS ACID CAPABLE OF PROMOTING THE CYCLIZATION OF PENDANT NITRILE GROUPS IS INCORPORATED IN A SOLUTION OF THE ACRYLIC POLYMER, A CYCLIZED ACRYLIC MATERIAL IS FORMED WITHIN THE SOLUTION AT AN ELEVATED TEMPERATURE, THE RESULTING SOLUTION IS SPUN TO FORM A CYCLIZED ACRYLIC FIBROUS MATERIAL WHICH IS SOLUBLE IN,N-DIMETHYLFORMAMIDE, AND THE RESULTING CYCLIZED ACRYLIC FIBROUS MATERIAL IS HEATED IN AN OXYGENCONTAINING ATMOSPHERE UNTIL A STABILIZED FIBROUS PRODUCT IS FORMED WHICH IS CAPABLE OF UNDERGOING CARBONIZATION AND WHICH IS INSOLUBLE IN N,N-DIMETHYLFORMAMIDE. THE STABILIZED FIBROUS MATERIAL MAY NEXT OPTIONALLY BE CARBONIZED OR CARBONIZED AND GRAPHITIZED AT ELEVATED TEMPERATURES WHILE PRESENT IN AN INERT ATMOSPHERE.
摘要:
IN THE SHRINK-PROOFING OF WOOL IT HAS BEEN FOUND THAT A PRODUCT HAVING AN EXCEPTIONALLY VALUABLE COMBINATIN OF PROPERTIES E.G. HANDLE, FLEXURAL PROPERTIES, TENSILE STRENGTH, RESILIENCE AND ELASTICITY IS OBTAINED WHEN WOOLLEN MATERIALS ARE FIRST SUBJECTED TO A UNIFORM TREATMENT WITH HYPOCHLOROUS ACID AT AN ACID PH, THE TREATMENT BEING LIMITED TO THAT WHICH WILL REDUCE THE SHRINKAGE UNDER STANDARDARD WASHING CONDITIONS BY 15-80%, THEN IMPREGNATED WITH A WATER-SOLUBLE CATIONIC HYDROPHILIC RESINOUS CONDENSATION PRODUCT CONTAINING POLYOXYALKYLENE GOUPS IN THE MOLECULE AND FINALLY HEATING THE WOOL WHEN IMPREGNATED WITH SAID CONDENSATION PRODUCT.