Please select the most similar patent number from A, B, C and D. Which number is?
A reinforced wound dressing and a preparation method therefor. The reinforced wound dressing comprises a gelatinous fiber material and non-gelatinous fiber reinforcing lines; the gelatinous fiber material is in the form of a non-woven fabric, preferably in the form of a needle-punched non-woven fabric, a hot-melted non-woven fabric, or a chemical bonded non-woven fabric; the non-gelatinous fiber reinforcing lines consist of surface lines and bottom lines, and are interwoven on the gelatinous fiber material along an interweaving track. The dressing is fantastic in concept and obvious in reinforcing effect; the advantages of a gelatinous fiber wound dressing on moisture absorption and wound protection are retained, and the dressing is also conducive to removal of gelatinous fibers as a whole piece during dressing changing, so that the risk that the gelatinous fibers remain on a wound is greatly reduced and thus the dressing is more beneficial for would healing.
A: Aerogel-modified polypropylene and preparation method therefor, and an ultralight thermal-insulating melt-blown non-woven fabric and preparation method therefor. The preparation method for aerogel-modified polypropylene comprises: before or during a polymerization reaction, adding aerogel to blend with reaction materials having low viscosity, thereby implementing uniform dispersion of the aerogel to prepare aerogel-modified polypropylene, wherein the reaction materials comprise a propylene monomer, a catalyst, and an additive, and the aerogel has granularity falling within the range from 20 nm to 100 μm, porosity falling within the range from 40% to 99.9%, stacking density falling within the range from 3 g/L to 500 g/L, and a volume fraction being 20-60% of the volume of the ultralight thermal-insulating melt-blown non-woven fabric prepared from the aerogel-modified polypropylene. The method can prepare aerogel-modified polypropylene particles having uniformly dispersed aerogel and great melt-blowing performance, and subsequently further prepares an ultralight melt-blown polypropylene non-woven fabric having a thermal insulating function, wherein the aerogel does not shed during the use of the non-woven fabric.
B: A preparation method for a flexible piezoresistive conductive material, comprising the following steps: placing a non-woven fabric in an oxidant solution for immersion treatment, the non-woven fabric being formed by interweaving and winding a plurality of fibers; removing redundant liquid from the non-woven fabric subjected to immersion treatment, and then performing preheating treatment; placing the preheated non-woven fabric in a 3,4-ethylenedioxythiophene gas atmosphere for polymerization reaction, so as to form poly(3,4-ethylenedioxythiophene) on the surface of any fiber of the non-woven fabric; and using an ethanol solution to clean the non-woven fabric subjected to the polymerization reaction, and then drying same until the ethanol solution is volatilized. According to the preparation method for the flexible piezoresistive conductive material, the resistance change quantity before and after pressurization is large, and the flexible piezoresistive conductive material has relatively high sensitivity to pressure change and has the potential of preparing a piezoresistive pressure sensor.
C: An extra-soft nonwoven fabric made of a modified nanofiber comprises the following layers sequentially stacked from bottom to top: a base layer; a hydrophilic layer bonded to the base layer; an anti-microbial layer bonded to the hydrophilic layer; and a soft modified nanofiber layer bonded to the anti-microbial layer, the soft modified nanofiber layer being formed by mixing polypropylene, a nano-elastic body and a soft masterbatch and performing fusion, silk-spinning, and a composite nonwoven process on the mixture. Multiple pattern units are uniformly arranged at a surface of the soft modified nanofiber layer away from the base layer. Each pattern unit comprises a first recess and a second recess. The first recess is proximate to the second recess. The first recess has a circular cross-section. The second recess has an S-shaped cross-section. The invention is softer and fluffier, has higher water-absorbing capacity, water-retaining capacity and anti-microbial capacity, and exhibits good hand feel. Also provided is a manufacturing method of the above extra-soft nonwoven fabric made of a modified nanofiber.
D: Provided is a wound dressing formed by a silicone film layer and an electrospun nano-fibre layer. The preparation method for the wound dressing comprises firstly evenly mixing the silicone, liquid paraffin, n-hexane and Span-80, casting the mixed solution into a mould made of polytetrafluoroethylene by a film casting method, steeping the silicone film in ethanol after drying and film forming, removing the paraffin ingredient so as to obtain a silicone film with a porous structure; and then electrospinning one layer of biodegradable polymer nano-fibre on the silicone film by an electrostatic spinning method, and performing radiation sterilisation after drying to obtain the finished product. The wound dressing prepared by the method has good moisturising properties and air permeability, can moisturise the wound and prevent the formation of a hypertrophic scar; and the unique support effect of the nano-fibre layer thereof can improve the formation of body tissues and speed up wound healing.
Answer: D