113 results about "Gfrp composite" patented technology

The invention discloses a formula of a glass fiber composite, and relates to the field of glass fiber. The composite comprises the following raw materials by weight: 12 to 13 parts of EW-200 glass fiber plain cloth, 14 to 16 parts of phenolic resin, 10 to 12 parts of barium titanate powder, 9 to 12 parts of a coupling agent, 7 to 9 parts of bamboo fiber felt, 6 to 8 parts of triethyl citrate, 3 to 5 parts of polypropylene powder, 7 to 9 parts of epoxidized soybean oil, 12 to 13 parts of bisphenol epoxy resin, 15 to 18 parts of dicumyl peroxide, 14 to 16 parts of maleic anhydride grafted polypropylene, and 20 to 25 parts of glass fiber. The glass fiber composite prepared according to the formula is light in weight, high in strength, and high-temperature resistant; due to the addition of barium titanate powder, the dielectric constant of the glass fiber composite is improved. The preparation method of the glass fiber composite is simple in process, and can be carried out on conventional equipment; the glass fiber composite is excellent in strength, rigidity and impact strength; the process is simple; the cost is low; the production efficiency is high.

The invention provides a glass fiber. The glass fiber comprises 42-48wt% of SiO2, 2-8wt% of Al2O3, 15-25wt% of B2O3, 3-8wt% of CaO, 1-4wt% of MgO, 0.5-3wt% of TiO2, 8-15wt% of ZnO, 5-12wt% of Na2O, 1-5wt% of Li2O, and 1-30wt% of B2O3 and Na2O. The softening point of the glass fiber containing the components is not higher than 600 DEG C, the melting temperature is low, and the glass fiber can be quickly softened and melted at a high temperature. When the glass fiber is used for the glass fiber composite material, the glass fiber is quickly melted at a high temperature, a candlewick effect is avoided, and the combustion of organic materials is restrained, so that the glass fiber composite material has the flame-retardant effect. In addition, the glass fiber is small in preparation difficulty, low in production cost, good in mechanical property and good in stability, and the glass fiber can satisfy the requirements for the strength and the service life of the glass fiber composite material.

The invention discloses a conductive and heat-conducting glass fiber composite material coated with dopamine and modified by nano-silica, which is characterized in that a buffer solution is added to the nano-silica, ultrasonically dispersed, dopamine is added, reacted in a water bath, centrifuged, Washing and drying; adding KH570 and ethanol to micron aluminum nitride, adjusting pH, ultrasonic oscillation, heating and stirring, reflux reaction, vacuum filtration after cooling, washing with water, drying, grinding and crushing to obtain modified aluminum nitride; glass fiber After calcination, soak in acetone for cleaning treatment, add hydrochloric acid solution, hydroxylation treatment, wash with distilled water, dry, add bovine serum albumin solution, stir for reaction, wash with water, and dry to obtain bovine serum albumin modified glass fiber Adding modified glass fiber to the graphite oxide dispersion, stirring, pulling, washing, drying, steam treatment, heat treatment, and then mixing with the material obtained above to obtain a conductive and thermally conductive material.

The invention specifically discloses a method for restraining a wind turbine blade adopting a compound damping structure from vibrating, which solves the problem that vibration easily caused by a large-scale flexible blade cannot be effectively prevented and eliminated by using a method. The method for restraining the wind turbine blade adopting the compound damping structure from vibrating comprises the following specific steps: a co-cured constrained damping layer is arranged on the surface of the blade, and a free damping layer is arranged on the outer surface of a girder; the free damping layer is formed by a single layer of damping material, and damping viscoelastic material, damping alloy or damping compound material is selected; the co-cured formation of the co-cured constrained damping layer is achieved by arranging a compound material layer and a damping material layer in a staggered manner, the compound material layer is made of fibre glass compound material, carbon fibre compound material or glass and carbon fibre compound material, and the damping material layer is made of the damping viscoelastic material. Compared with the prior art, the method has universal applicability, effective vibration restraining performance, economical efficiency and designability.

The invention discloses a preparation technique for a glass fiber composite material, and relates to the technical field of glass fiber composite material preparation. The preparation technique comprises four machining steps of glass fiber preparation, polymer fiber preparation, treatment technique for silane coupling agent and finished product. The glass fiber composite material prepared through the preparation technique has the advantages that the cost of the used materials is low, the service life is long, and automatic production is convenient. The prepared glass fiber composite material is acid-base resisting, good in rigidity, aging resisting and oxidation resisting. Compared with untreated glass fiber, the surface and structure of the treated glass fiber are both changed. The surface of the polymer fiber treated through a coupling agent is no longer to be smooth, active groups are increased, gullies and attachments adhered on the surface are formed in the overall appearance, consistency of the glass fiber is increased, and mechanical property of the glass fiber composite material is increased at the same time.

The invention provides a forming process for an annular carbon fiber composite material pull rod and belongs to the field of a forming process of a composite material. In the forming process provided by the invention, band winding, mould pressing and curing are carried out by adopting a carbon fiber prepreg tape, so that the annular carbon fiber composite material pull rod can be manufactured. The forming process provided by the invention can be used for strictly controlling the content of resin in a product and reducing the porosity; the forming process has the advantages of good size stability of workpieces, strong bearing capacity and good low-temperature resistance, and can be used for a long term at a temperature of -55 DEG C. In the forming process provided by the invention, T700-level carbon fiber epoxy resin-based prepreg is adopted; the thermal expansion coefficient is 0.046-0.10 time as much as that of a glass fiber composite material; the annular pull rod made of the material has the advantages of relatively high bearing capacity and size stability.

The invention provides a preparation method of a composite material bar for a concrete structure. The composite material bar consists of a one-way glass fiber composite material core and a carbon fiber spiral bulge. A preparation technology comprises the following steps of: firstly, under the traction of traction force, carrying out mould shaping on one-way glass fiber bundles soaked with resin to form the one-way glass fiber composite material core; secondly, spirally winding a carbon fiber composite material around the surface before curing, and adjusting winding parameters so as to wind one or more carbon fiber bundles by a certain thread pitch, thus forming a thread; and at last, carrying out curing on the composite core and the thread together and cutting out as required length, thus obtaining the composite material bar for the concrete structure. The coefficient of thermal expansion of the composite material bar is adjusted to be close to that of concrete by the composition of the carbon fiber composite material spiral outer layer and the glass fiber composite material core rod as well as the changes of the winding angle and the winding thread pitch of the carbon fiber, and the temperature stress of the composite material bar and the concrete is lowered.

The invention relates to the technical field of glass fiber composite materials, in particular to a flame-retardant glass fiber composite material and a preparation method thereof. The flame-retardant glass fiber composite material comprises the following raw materials: a glass fiber composition and an epoxy resin base material glue solution, wherein the weight ratio of the glass fiber composition to the epoxy resin base material glue solution is 7: (3-3.5); the glass fiber composition is mainly prepared from the following raw materials in parts by weight: 58 to 65 parts of SiO2, 5 to 10 parts of gamma-Al2O3, 8 to 16 parts of CaO, 8 to 13 parts of MgO, 2 to 5 parts of B2O3, 0.1 to 0.3 part of Li2O, 0.5 to 2 parts of Na2O, 0.01 to 0.03 part of Sb2O3 and 0.1 to 0.5 part of Co powder. The melting point of the glass fiber is reduced on the premise that the performance of the glass fiber is not affected, the flame retardance is enhanced, smooth wire drawing is ensured, and the prepared glass fiber composite material is good in fire resistance.

A composite riser for an archery bow formed from fibers embedded in resin in such a way that resin rich areas, dry fibers and voids are eliminated, providing consistent risers of high quality. The location of structural fibers, such as a carbon fibers or fiberglass composite materials, is ensured within a mold used to form the riser and relative to the resin which bonds the fibers together. Various processes may be used to form the riser with control of the fibers and resin maintained. For example, structural reaction injection molding, liquid composite molding, continuous fiber molding, modified compression molding, resin transfer molding and variable infusion molding processes can be used.

The invention relates to the technical field of glass fiber composite materials, in particular to a glass fiber resin composite material and a preparation method thereof. The raw materials of the glass fiber resin composite material comprise glass fiber cloth and an epoxy resin base material glue solution, wherein the weight ratio of the glass fiber cloth to the epoxy resin base material glue solution is 7: (3-3.5), and the epoxy resin base material glue solution is prepared from the following raw materials in parts by weight: 80-110 parts of epoxy resin, 8-10 parts of porous glass micro-beads, 12-16 parts of alumina powder, 5-9 parts of a dispersing agent and 2-5 parts of an adhesive. According to the invention, porous glass micro-beads are treated to form high-strength and high-dispersity microspheres, the high-strength and high-dispersity microspheres are uniformly mixed with epoxy resin to prepare an epoxy resin base material glue solution, glass fiber cloth quickly passes through the molten epoxy resin base material glue solution, the surface of the glass fiber cloth is quickly coated with the epoxy resin base material glue solution, and the hardness and the strength of the formed glass fiber resin composite material are greatly improved.

The invention discloses a sodium bismuthate/epoxy resin/glass fiber composite material, a preparation method thereof and an application method for the composite material in degradation of organic waste water. The preparation method comprises the following steps: soaking sodium bismuthate powder in an aqueous solution of a silane coupling agent for treatment, then taking out the sodium bismuthate powder and drying the sodium bismuthate powder for subsequent usage; adding methyl tetrahydrophthalic anhydride into an epoxy resin and carrying out uniform mixing so as to obtain an epoxy resin glue solution; and mixing the treated sodium bismuthate with the epoxy resin glue solution, carrying out ultrasonic dispersion, coating an obtained mixture on glass fiber cloth, folding the glass fiber cloth three to five times in a die, carrying out curing, cooling and demolding and cutting the glass fiber cloth to a certain shape and a certain size. The application method comprises the following steps: uniformly putting the composite material with an appropriate shape and an appropriate size between jacket layers of a glass tube reactor and installing a visible light lamp at the center of an inner tube; allowing organic waste water to enter into a glass jacket, pass through the composite material and undergo a visible light catalytic degradation reaction with sodium bismuthate under irradiation by visible light. The preparation method has the advantages of low requirements on equipment, simple procedures, low energy consumption and convenience in operation; and the composite material is capable of degrading organic waste water in a short period of time.

The invention belongs to the technical field of fiber glass composite material and discloses enhancement mode fiber glass chopped strand mat and a preparation method thereof. The main technical characteristics lie in that the invention comprises a felt body which is formed by chopped fiberglass laminate; the interior of the chopped fiberglass laminate is provided with polyester thread strengthening rib. The enhancement mode fiber glass chopped strand mat provided by the invention is lengthways provided with the polyester thread strengthening rib in the felt body which is formed by the chopped fiberglass laminate. Compared with the current Chopped strand mat, the enhancement mode fiber glass chopped strand mat is added with the longitudinal polyester thread strengthening rib to strengthen the longitudinal tensile force which is two to three times of the common chopped strand mat, has good mechanical property and high mechanical strength, when being applied to FRP products, roofing water proofing building materials, and the like, the service life is prolonged to be 10 to 15 years of products, meanwhile, the product is characterized by uniform distribution, rapid velocity of permeability, good coated performance and low cost.

The invention relates to an SMA-GFRP (Styrene Maleic Anhydride-Glassfiber Reinforced Plastics) hyperelastic composite bar and a manufacturing method thereof. The manufacturing method of the SMA-GFRP hyperelastic composite bar comprises the following specific steps: a, placing extremely-fine SMA filaments which are 24 percent in volume percentage and are 0.5mm in diameters and 44 percent of GFRP tows in parallel or annularly, and curing a flexible vinyl ester resin matrix between two kinds of fibers through a pultrusion process, wherein the volume percentage of the flexible vinyl ester resin matrix is 32 percent, and a section is a circle being the same as a steel bar through molding of the pultrusion process; b, deforming the surface of the SMA-GFRP bar or performing sand burning treatment on the surface to enhance anchoring between the SMA-GFRP and concrete. The SMA-GFRP hyperelastic composite bar has high ductility and corrosion resistance, and the problem of limited use of the GFRP bar in an anti-earthquake structure is solved; when the SMA-GFRP composite bar is applied to a plastic hinging area, the anti-earthquake performance of a structure is enhanced, residual displacement accumulation after continuous earthquakes is reduced, and the integral performance of the structure after continuous earthquakes is improved.

The invention belongs to the technical field of civil engineering, and discloses a CFRP(BFRP) longitudinal bar-GFRP composite stirrup square pipe pile and a design method. Transverse stirrups and spiral bars of a cross section of the square pipe pile adopt GFRP bars; vertical longitudinal bars and pre-stressed bars of the square pipe pile adopt CFRP (BFRP) longitudinal bars; the square pipe pile is provided with two layers of FRP bar cages; an outer FRP bar cage consists of vertical CFRP(BFRP) longitudinal bars and GFRP stirrups arranged on along the outer edge of the square pipe pile; and aninner circular FRP bar cage consists of pre-stressed CFRP(BFRP) longitudinal bars and GFRP spiral bars arranged on the edge of a circular cavity. The CFRP(BFRP) longitudinal bars on the inner side aremainly used for bearing pulling force when the square pipe pile is used as an uplift pile, improves the anti-cracking performance of the square pipe pile by applying pre-stressing force, and improvesthe lateral stiffness and durability of the square pipe pile. Stress bars of the pipe pile of the invention adopt a fiber reinforced composite material rather than steel, so that the corrosion resistance of the pipe pile is strong, and the pipe pile is suitable for the environment, such as deep sea, with strong corrosion.

The invention discloses a preparation method of a mesoporous MSQ aerogel/glass fiber composite material. The method comprises the following steps: proportionally mixing and stirring hexadecyl trimethyl ammonium chloride, hydrochloric acid, methanol and methyltrimethoxysilane, adding a gel accelerator, stirring, and pouring into a fixed container to obtain sol; pouring an infrared opacifying agentinto the sol in proportion to obtain composite sol; dipping a glass fiber felt in the composite sol; curing the gel/glass fiber composite material; and drying the gel/glass fiber composite material. The mesoporous MSQ aerogel and the glass fiber mat are compounded, so that the mechanical properties of the mesoporous MSQ aerogel can be improved; and the mesoporous MSQ aerogel is modified by adopting infrared opacifying agent such as titanium sol or nanometer titanium dioxide and the like, so that the heat insulation performance of the glass fiber felt at high temperature can be improved.

The invention discloses an aluminum-titanium doped silicon dioxide aerogel/fiber composite material and a preparation method thereof. The preparation method comprises the following steps: taking and adding absolute ethyl alcohol, a hydrochloric acid solution, aluminum chloride hexahydrate and tetrabutyl titanate into a reaction kettle, weighing and slowly pouring ethyl orthosilicate into the reaction kettle, and stirring to obtain a sol; adding a gel accelerator, and continuously stirring to obtain a composite sol; impregnating a glass fiber felt in the composite sol, and flatly paving the impregnated glass fiber mat on a flat plate; putting the glass fiber felt impregnated with the composite sol into a plastic box, sealing, carrying out gel aging, and replacing the aged gel/glass fiber composite material with a solvent; and performing supercritical drying on the gel/glass fiber composite material. The strength and toughness of the aerogel can be enhanced while the heat insulation property of the aerogel is reserved, the high-temperature resistance of the silicon dioxide aerogel is improved through aluminum element doping, and the prepared aerogel/fiber composite material has verygood stability and heat insulation property.

The present disclosure relates to a structural member with a core bar which has good mechanical strength and quality properties compared to existing metallic structural members, significantly reduces manufacturing costs, enables easy construction of various curved building structures such as a dome-shaped building structure or an arch-shaped building structure without a truss structure or a formwork to be economically feasible and excellent in construction efficiency, and contributes to the protection of the global environment. The structural member includes: at least one elastic core bar formed in a bar shape; and an outer body or an outer cover into which the at least one core bar is inserted. The core bar is formed at least one of wood such as a bamboo strip or a composite bamboo bar, a synthetic resin material, a glass fiber composite material, and a carbon fiber composite material. The outer body or the outer cover is formed of at least one of a metallic material such as aluminum, a synthetic resin material, a glass fiber composite material, and a carbon fiber composite material.

The invention discloses an automobile composite pedestrian protection beam. The automobile composite pedestrian protection beam comprises a protection beam body formed through integrated compression molding, an energy absorption box used for absorbing impact force borne by the protection beam, and a rectangular aluminum sheet connected between the energy absorption box and the protection beam body, wherein the protection beam body is made of a glass fiber composite material, the surface of the protection beam body is reinforced by carbon fibers or aramid fibers to improve the strength of the protection beam, and the protection beam body and carbon fibers or aramid fibers are connected in an adhesive mode; the section of the protection beam is designed to be M-shaped, and continuous geometric reinforcing ribs are arranged on the inner side of the protection beam; and in order to be effectively connected with the energy absorption box, the two ends of the protection beam are each provided with a sunken cuboid groove, and the bottom surfaces of the grooves are connected with the energy absorption box through the aluminum sheets. The pedestrian protection beam is manufactured by adopting a compression molding process, the process is simple, and large-batch manufacturing can be realized; and the composite material is adopted for design, the dead weight is effectively reduced while the strength of the protection beam is guaranteed, and the lightweight design is achieved.

The invention relates to a photothermal double-cured resin composition for pultrusion and a glass fiber composite material prepared from the photothermal double-cured resin composition, and belongs tothe technical field of polymer materials. The composition is composed of the following components: in parts by mass, 60-75 parts of epoxy acrylate, 25-40 parts of a reactive diluent, 4-10 parts of aphotoinitiator, 1-4 parts of a thermal initiator, 1-3 parts of a thickener, 0.5-1 part of a silane coupling agent, 0.5-1 part of a defoamer, 0.5-1 part of a polymerization inhibitor and 0.5-1 part ofan internal releasing agent. The glass fiber composite materials which is prepared from the composition has high hardness, high tensile strength, high flexural strength and high flexural modulus; moreover, photothermal double curing is adopted, the curing depth is good, and the pultrusion speed can be increased to 5-10 m/min; and only initial molding of the material is achieved through thermal curing, no complete curing is needed, and therefore only a temperature of 80-100 DEG C is needed, so that energy consumption is greatly reduced.

The invention discloses a glass fiber composite material and relates to the technical field of glass fiber production. The components of the composite material include (weight percentage) : 48 to 56% of silicon oxide, 10 to 15% of aluminum oxide, 15 to 25% of calcium oxide, 1 to 4% of magnesium oxide, 12 to 14% of sodium oxide, 1 to 2% of potassium oxide, 0.1 to 0.6% of ferric oxide, 1 to 3% of titanium oxide and 1 to 3% of zinc oxide. The silicon oxide, the aluminum oxide and the calcium oxide are adopted as main raw materials, the proportion of the components is optimized, the prepared glass fiber composite material has excellent water resistance and fine acid resistance, electrical properties and mechanical properties, material resources are in wide range, cost is low, and the product quality is stable.