8results about How to "Composite firm" patented technology

The invention discloses a preparation method and application of a nano porous foamed aluminum material, and belongs to the technical field of porous metal materials. The method comprises the following steps: mixing main aluminum powder with SiO2 coated aluminum powder waste; the three-layer core-shell pore-forming agent is of a PMMA inner core / Sn-Bi alloy middle layer / Al2O3 outer layer structure, and the PMMA particle size of the three-layer core-shell pore-forming agent is in gradient distribution (the surface layer is 50-100 nm, the middle layer is 200-300 nm, and the core layer is 400-500 nm); after cold press molding, two-stage stepped sintering is carried out, in the first stage, Sn-Bi alloy is melted at low temperature in N2-H2 atmosphere to wrap aluminum powder, and in the second stage, PMMA is decomposed at high temperature under vacuum, carbon-containing gas and pressure to form pores, and an Al4C3 reinforced phase is generated in situ. High-performance fireproof, catalytic and electromagnetic shielding functional materials can be further prepared through surface compounding of Al4C3 / expanded graphite, in-situ growth of ZnO nanorods / Pt or compounding of carbon nanotubes, and the material can be widely applied to the fields of new energy batteries, environment-friendly catalysis and 5G communication.

The invention relates to the technical field of aerogel microsphere preparation, in particular to a method for preparing composite nanocellulose aerogel microspheres based on electrostatic field auxiliary regulation and control. Comprising the following steps: forming uniform liquid drops from a silane modified nano cellulose suspension through an electrostatic spraying device provided with an annular electrode group and a real-time monitoring feedback system; the liquid drops are induced by an electrostatic field in a pre-cooling area to be initially set and then subjected to liquid nitrogen cryogenic treatment, gradient freeze drying is conducted, and aerogel microspheres are obtained; and finally, carrying out surface modification on the aerogel microspheres, and loading nano microspheres under the assistance of an alternating electric field to obtain the composite nano cellulose aerogel microspheres. Through the synergistic effect of the multi-stage electric field, accurate regulation and control on the whole process of microsphere forming, internal structure construction and functional compounding are realized, so that the composite nanocellulose aerogel microspheres with narrow particle size distribution, uniform size and adjustable functions are prepared, and the composite nanocellulose aerogel microspheres have wide application prospects in the fields of adsorption, catalysis, biological medicine and the like.

The present application relates to the technical field of sanitary products, and particularly relates to a biodegradable nursing pad and a preparation process thereof. The nursing pad comprises a skin-friendly top layer, a composite core absorption layer and a gas-impermeable bottom layer from top to bottom. The composite core absorption layer comprises a gel-embedded skeleton composed of an air-laid wood pulp fiber web and a composite antibacterial hydrogel in-situ cross-linked and embedded in the pores of the web, and a fluff pulp fiber layer fixed to at least one surface of the skeleton. The composite antibacterial hydrogel comprises hydrophilic reinforcing fibers modified by a silane coupling agent with a hydrophilic group, a sodium alginate matrix and zinc ions. The nursing pad prepared by the present application has excellent rapid absorption, high antibacterial efficiency and high biodegradability, and solves the problem that traditional products are difficult to have both performance and environmental protection.

The application relates to the technical field of composite materials, and discloses a preparation method of a multilayer composite core body, which comprises the following steps: pretreatment, spraying treatment, core composite material preparation, compounding and curing forming; the surface of a fiber base layer is chemically modified through functional pretreatment, the wettability and reactivity of the fiber surface are improved, the different fiber layers with different functional characteristics can be more closely and stably combined, and therefore the integrity, reliability and durability of the multilayer composite core body structure are enhanced; through spraying treatment, functional particles are uniformly loaded on the surface of the fiber base layer in the form of a stable dispersion liquid; the functional particles have good compatibility and bonding force with the fiber base and the interlayer composite material after being treated and surface-modified in a specific manner, the core body is endowed with specific surface functions, the interface bonding between the fiber and the base is enhanced, and the functionality, uniformity and structural strength of the core body are improved.

This utility model relates to the field of composite fabric production technology, specifically to a composite fabric production device, including a composite equipment frame for composite fabric production. An automatic gluing box is fixedly installed on the top surface of the composite equipment frame near the feeding end. An upper fabric roller is movably installed on the top of the automatic gluing box via a bracket. A composite fabric pressure roller, an automatic curing box, and an automatic clamping and winding mechanism are sequentially arranged on the side of the automatic gluing box near the discharge end. The automatic clamping and winding mechanism includes a first mounting frame and a second mounting frame fixedly installed on both sides of the composite equipment frame. A winding roller is movably installed between the first mounting frame and the second mounting frame via a drive motor. The winding roller includes a lower roller body. Compared with existing TPU composite fabric processing equipment, this device can automatically clamp and wind up one end of the fabric, preventing wrinkles or misalignment under external force, resulting in more stable composite. It can not only realize online TPU composite but also post-lamination composite.

The invention discloses a multifunctional double-layer nanofiber membrane and a preparation method and application thereof, and belongs to the technical field of functional textile. The multifunctional double-layer nanofiber membrane is composed of a radiation temperature adjusting layer 1 and a sunlight reflecting layer 2; the radiation temperature regulation layer 1 is prepared from a solid-solid phase change polyurethane spinning solution A containing solid-solid phase change polyurethane and a spinning solution B containing solid-solid phase change polyurethane and silicon dioxide microspheres at the same time through electrostatic spinning, and the thickness of the radiation temperature regulation layer 1 is 40-80 microns; the sunlight reflecting layer (2) is prepared from a spinning solution C containing polyvinylidene fluoride and a spinning solution D simultaneously containing polyvinylidene fluoride and silicon dioxide nanospheres through electrostatic spinning, and the thickness of the sunlight reflecting layer (2) is 10-40 microns; the radiation temperature adjusting layer 1 and the sunlight reflecting layer 2 are obtained through sequential spinning combination, through double-layer structure design, functional filler type selection and process parameter optimization, high performance, comfort and practicability are considered, and remarkable technical advantages and application value are achieved.

The application provides a moisture-regulating and sweat-guiding composite fabric and a preparation method thereof. The moisture-regulating and sweat-guiding composite fabric comprises, in sequence, an outer fabric layer, a waterproof and breathable layer and a moisture-regulating and sweat-guiding layer, and the layers are bonded through hot melt adhesive. The moisture-regulating and sweat-guiding layer is obtained by blending moisture-guiding fibers and moisture-storing and buffering polyester fibers. The moisture-guiding fibers are obtained by melt spinning after blending of first polyester chips and sodium-based montmorillonite. The moisture-storing and buffering polyester fibers are obtained by melt spinning after blending of second polyester chips and divalent metal ion-exchanged zeolite. The application can make the skin-friendly side of the composite fabric have liquid sweat absorption and accommodation capacity, moisture-guiding and diffusion capacity and drying performance.

The application relates to the technical field of fin processing, in particular to an electronic-grade fin automatic production line based on graphene and a production process thereof, and the electronic-grade fin automatic production line based on graphene, which comprises a supporting table, a plurality of supporting legs are fixedly installed at the bottom of the supporting table, mounting blocks are installed on the two sides of the supporting table, a first composite roller is arranged on the supporting table and mounted on the mounting blocks, a first silica gel protective film roll and a second silica gel protective film roll are symmetrically installed on one side of the first composite roller, the positioning conveying mechanism is arranged, a structure for conveying and positioning graphene materials and film bodies is arranged on the composite roller, the composite roller can stably convey the graphene materials and the film bodies, the two can be completely compounded, graphene material and film body deviation is avoided, and the processing quality of the graphene fin is prevented from being affected.