Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed are an anti-propylene mask and a method for preparation thereof; the anti-propylene mask comprises a fiber cloth contact layer, an antistatic non-woven fabric layer, and a fullerene/nano titanium dioxide spunbond layer which are arranged in sequence; the fullerene/nano titanium dioxide spunbond layer is made by spun-bonding the modified resin material into a fiber web; the raw materials of modified resin materials comprise matrix resin, carboxylated fullerene derivatives, nano titanium dioxide, lubricants, and coupling agents; the modified resin material is prepared by means of the following method: a carboxylated fullerene derivative is mixed and reacted with said nano titanium dioxide to prepare a nano titanium dioxide modified by the carboxylated fullerene derivative, which is then blended and extruded with the remaining components in the raw material, and thus prepared; the mask of the present invention is not only easy to use but also convenient to carry, and can prevent propylene from entering the human body through the human respiratory organs, has a good anti-propylene effect, and also has an anti-static function, and is particularly suitable for use in a propylene production workshop.
A: The present invention provides a titanium dioxide nanobelt@MOF composite material, a preparation method therefor, and use thereof. The preparation method comprises the following steps: preparing a titanium dioxide nanobelt; carboxylation-treating the titanium dioxide nanobelt, so as to obtain a carboxyl-modified titanium dioxide nanobelt; and mixing the carboxyl-modified titanium dioxide nanobelt, a metal salt, and an organic ligand, and then performing a heating and crystallization treatment, so as to obtain a titanium dioxide nanobelt@MOF composite material. In said method, carboxyl functional modification is performed on the surface of the TiO 2  nanobelt and further an MOF material is grown in situ, allowing a simple process and low costs, achieving the preparation of a TiO 2  nanobelt@MOF composite material which has a shell layer having a controllable thickness and connected by means of covalent bonds, providing a good application prospect. The titanium dioxide nanobelt@MOF composite material provided in the present invention has a porous core-shell structure having a shell layer and an inner core, the core being a titanium dioxide nanobelt, and the shell layer being an MOF layer connected to the surface of the inner core by means of covalent bonds, improving the photocatalytic performance, providing high visible light response capability.
B: Disclosed is a composite material comprising an inorganic non-metal mineral as a support and a nano titanium dioxide layer carried on the support, with the layer consisting of a plurality of titanium dioxide nano spheres and the titanium dioxide nano spheres consisting of a plurality of individual titanium dioxide nano particles. Also disclosed is that one or more multi-functional layers are additionally carried on the titanium dioxide nano layer on the composite material. The composite material not only exerts the advantages of the nano titanium dioxide layer of having a high refractive index and high coverage capacity, but also exerts the good photocatalytic activity of the small individual nano particles therein, and facilitates the coating with other functional layers so as to prepare functionally enhanced or multifunctional composite materials. In addition, a preparation process for the composite material is provided, which is easy and low in cost. The composite material can be used in various industrial fields as an additive, and has good compatibility.
C: The present invention relates to a plastic composite material capable of being polished and connected to metal, and a preparation method therefor. The composite material comprises, in parts by weight, the following components: PBT: 50-80; GF: 10-50; nano titanium dioxide: 1-5; a dispersing fluid medium: 3-10; compatibilizer: 1-8; a toughening agent: 5-10; an antioxidant: 0.1-1; and a lubricating agent: 0.1-1. The preparation method therefor comprises: (a) mixing the PBT resin, the nano titanium dioxide, the toughening agent, the compatibilizer, the antioxidant, and the lubricating agent in a mixer; and (b) subjecting the mixture obtained in step a to blending granulation by means of a double-screw extruder, laterally feeding the GF, and performing melt extrusion and granulation to obtain the plastic composite material. Compared with the prior art, the plastic composite material provided by the present invention has high affinity with metal and excellent post-processing polishing performance by adding a compatibilizer by means of a special process.
D: Disclosed are a melt-blown composite nanometer antibacterial super-soft nonwoven material and a preparation method. The melt-blown composite nanometer antibacterial super-soft nonwoven material comprises a first flexible melt-blown layer (1), a first nanofiber antibacterial layer (2), a nanofiber hydrophilic layer (3), a second nanofiber antibacterial layer (4) and a second flexible melt-blown layer (5), which are arranged successively from top to bottom, and both the first nanofiber antibacterial layer (2) and the second nanofiber antibacterial layer (4) are formed by alternately laminating a nanometer titanium dioxide material layer (6) and a nanofiber antibacterial material layer (7). The first flexible melt-blown layer (1) and the second flexible melt-blown layer (5) provide the melt-blown composite nanometer antibacterial super-soft nonwoven material with a better softness, a good hand feeling and a high comfort degree. A sustained antibacterial body is formed by alternately laminating the nanofiber antibacterial material layer (7) and the nanometer titanium dioxide material layer (6), making the nonwoven material have a lasting antibacterial effect. The nanometer titanium dioxide layer (6) also has a good anti-ultraviolet function. The nanofiber hydrophilic layer (3) makes the nonwoven material have a good hydrophilicity.
Answer: D