38results about How to "Strengthen the bridging effect" patented technology

The invention discloses a plugging material and plugging slurry for protecting a reservoir stratum with the low fracturing fracture ability. The plugging material is prepared from, by weight, 5-6 parts of walnut shell powder, 2-3 parts of a composite plugging agent, 1.5-2 parts of an agent for plugging while drilling, 4-5 parts of an acid soluble plugging agent, 4-5 parts of a high-dehydration-rate plugging agent and 0.2-0.3 part of calcium oxide. The natural plant inertia material, the fiber plugging agent and the acid soluble plugging agent are mixed according to the certain matching ratio to form the acid soluble plugging material in granule and fiber shapes. The material has the advantages that the bridging effect of a bridging material is good and the plugging success rate is high, and also has the advantages that the density is low, stratum pressure is effectively balanced, the stratum damage is small, the plugging property is strong and acid solubility is achieved. The plugging slurry prepared from the plugging material and water has the advantages of being low in density, high in pressure bearing capability, good in malignant leakage plugging effect, high in acid solubility and the like; the on-site preparation process is simple, construction is safe and reliable, and the purposes of reducing well leakage loss and protecting the reservoir stratum can be achieved.

The invention discloses a novel compound water treatment flocculant as well as a preparation method and application thereof, and belongs to the field of sewage treatment. The water treatment flocculant is prepared from bentonite and chitosan which exist extensively in the nature as main raw materials by the steps of adopting an acid dissolution-covering-loading technology to prepare chitosan-loaded bentonite, adopting quaterisation reaction to prepare quaterisation chitosan, and combining polymeric ferric sulfate at the same time, thereby preparing the novel compound water treatment flocculant. The novel compound water treatment flocculant is applied to sewage treatment to solve the problem of aluminum and iron residues during water treatment, the problem of secondary pollution of acrylamide monomers, and the defects of loose particles, difficult sedimentation and the like caused by single use of a biological flocculant.

The invention relates to a method for destabilization coagulating treatment of well drilling waste liquid for carrying out innocent treatment on the well drilling waste liquid in oil-gas field well drilling. The method can be used for carrying out innocent treatment on the well drilling waste liquid and increasing a treatment effect. In a technical scheme, the method comprises the following stepsof: firstly, adding a destabilizing agent into a reaction tank filled with well drilling waste liquid, wherein the destabilizing agent is prepared by preparing a mixture of 85 percent of CaCl2 and 15percent of MgCl2 into a solution with the concentration of 20 percent; stirring and mixing for 10-15 minutes to make destabilize the well drilling waste liquid; adding a coagulating agent into the tank, wherein the coagulating agent is prepared by preparing a mixture of 95 percent of polyAlCl3 and 5 percent of polyacrylamide into a solution with the concentration of 20 percent; stirring and mixing for 15-20 minutes; and finally, inputting the mixture into a solid-liquid separating device, wherein after the mixture is separated, a liquid phase reaches an emission standard and a curing agent isadded into a solid phase for carrying out curing treatment. Treatment agents used in the invention have good destabilizing and coagulating effects on the well drilling waste liquid and are low in dosage and convenient for operation; and the method has the advantages of low cost and economy and is used for innocent treatment of the well drilling waste liquid.

The invention discloses a controllably degraded biological full-degradable plastic, and relates to the technical field of plastic preparation. The controllably degraded biological full-degradable plastic is prepared from the following raw materials in parts by weight: 15 to 25 parts of straw fiber, 10 to 20 parts of bran, 5 to 15 parts of cyclodextrin, 4 to 12 parts of maltodextrin, 15 to 25 partsof polylactic acid, 15 to 25 parts of poly(butylene succinate), 6 to 16 parts of calcium carbonate, 4 to 10 parts of Pulullan, 3 to 7 parts of chitosan, 1 to 7 parts of benzoic acid, 1 to 5 parts ofacetic acid, 2 to 8 parts of sodium stearate, 1 to 7 parts of ethylene acrylic acid co polymer, 4 to 12 parts of linolenate, 5 to 15 parts of Arabic gum, 2 to 8 parts of mannitol, 2 to 8 parts of oxidized polyethlene wax and 4 to 10 parts of sodium carboxymethyl starch. The preparation method comprises the following steps: pretreatment of bran, modification of straw fiber, mixing, extrusion blow molding and the like. According to the plastic disclosed by the invention, biological full-degradation can be carried out, and the degradation time is controlled by adjusting the proportion of degradable substances, and degradation can be completed fundamentally outdoors for 3 to 9 months, so that the environment cannot be polluted, and the plastic is high in structural strength and mechanical strength at the same time.

The invention discloses an aluminum pigment for a 3D printing high polymer material. The aluminum pigment comprises the following raw materials in percentage by weight: 75-80% of an aluminum pigment,10-15% of a carrier resin, 3-5% of a compatilizer, 1-3 parts of an antioxidant and 2-4 parts of a lubricant. A preparation method of the aluminum pigment comprises the following steps: uniformly mixing the raw materials according to a formula ratio so as to obtain a mixed material; putting the mixed material into a single screw extruder, and performing extrusion through eight temperature zones of130 DEG C, 140 DEG C, 160 DEG C, 160 DEG C, 160 DEG C, 160 DEG C, 150 DEG C and DEG C, thereby obtaining a finished product. The aluminum pigment has the advantages that the formula of a pre-dispersedaluminum pigment is optimized, the 3D printing high polymer material is adopted as the carrier resin and has an excellent coupling dispersion property and a bridging function of a silane coupling agent, the compatibility of the pre-dispersed aluminum pigment and a main body high polymer material is greatly improved, and the VOCs (Volatile Organic Chemicals) emission is reduced; the aluminum pigment is processed by virtue of the thermal plastic principle of plastic, defective products can be reprocessed, the product pass percent is increased, and the production and manufacturing cost is reduced.

The invention discloses a fully-biodegradable plastic and a preparation method thereof and relates to the technical field of plastic preparation. The fully-biodegradable plastic is prepared from, by weight, 40-60 parts of polycaprolactone, 10-20 parts of straw fiber, 10-20 parts of bran, 5-15 parts of chitosan, 4-10 parts of biuret modified epoxide resin, 2-8 parts of methylene diphenyl diisocyanate, 1-7 parts of acetyl tributyl citrate, 0.1-0.5 part of 2,2-bis(4-hydroxyl phenyl) propane, 1-8 parts of polypropylene grafted maleic anhydride, 1-5 parts of silane coupling agent, 1-5 parts of stearic acid, 1-5 parts of carrageenan and 1-7 parts of glycerin. The preparation method comprises the steps of bran pretreatment, straw fiber modification, mixture, extrusion, blow molding and the like.The plastic can be fully biodegradable, can be completely biodegraded outdoors in 3-9 months and does not pollute the environment. In addition, the structural strength and the mechanical strength of the fully-biodegradable plastic are improved, the tensile strength of the plastic is 9-18 N/mm<2>, the breaking strength is 10-28 N/mm<2>, and the elongation at break is 100-240%.

The invention relates to the field of sewage treatment, in particular to an ammonium salt sewage treatment flocculant. The preparation method comprises the following steps: grafting carboxyl anions on cyano groups of chitosan molecules by using chloroacetic acid, then carrying out free radical polymerization by using a quaternary ammonium salt cationic monomer, and grafting a long-chain cationic unit to prepare the chitosan flocculant with an amphoteric structure. According to the invention, the steric hindrance during free radical polymerization of the cationic monomer is reduced, the grafting rate of a long-chain cationic unit is increased, the flocculant fully plays a sufficient charge attraction role, the bridging capability of molecules is improved, and the electrostatic adsorption capability and flocculation effect of the flocculant material are improved; secondly, the reactivity of chitosan molecules is improved, so that the situation that the flocculating agent only swells and loses the flocculation capacity due to self-crosslinking of long-chain cation units is prevented. The chitosan flocculant belongs to a natural polymer material, and has the advantages of high efficiency, environmental protection, low cost and the like.

The invention provides a light high-strength ABS wood-plastic foamed board and a preparation method thereof. The wood-plastic foamed board is prepared from the following components in parts by weight:20-30 parts of ABS resin particles, 10-20 parts of maleic anhydride grafted ABS resin particles, 40-60 parts of wood flour, 5-10 parts of coated flame-retardant polypropylene fibers, 5-7 parts of modifier and 2-5 parts of foaming agent and 0-6 parts of a filler. Reasonable raw material selection and self-made pretreatment of part of raw materials are carried out, the reaction combination effect between the materials is effectively improved and the performance effect is higher; and the ABS is adopted as a board substrate, the comprehensive quality is good, the applicability is high, the prepared board is light, high in strength and excellent in corrosion resistance, mildew resistance, acid and alkali resistance, water resistance, heat preservation, flame retardance and the like, the mechanical property is remarkably improved, and the popularization and application value is high.

The invention discloses a degradable composite material and a preparation method thereof, and relates to the technical field of plastic preparation. The degradable composite material is prepared fromthe following raw materials in parts by weight: 30 to 40 parts of polyethylene, 20 to 30 parts of bacterial cellulose, 10 to 20 parts of cyclodextrin, 30 to 40 parts of polylactic acid, 30 to 40 partsof polybutylene succinate, 6 to 14 parts of zymosan, 1 to 6 parts of acetyl chloride, 1 to 8 parts of n-octanol, 2 to 10 parts of silane coupling agent, 5 to 12 parts of chitosan, 5 to 15 parts of maleic anhydride grafted polyethylene, 1 to 8 parts of arabic gum, 1 to 6 parts of epoxy chloropropane, 1 to 6 parts of acetyl tributyl citrate and 2 to 8 parts of polyvinyl acetate. The preparation method comprises the following steps of modification of the bacterial cellulose, mixing, extrusion, band casting, granulation, injection molding and the like. The composite material provided by the invention is stable in structural performance and good in mechanical strength, has the tensile strength of 10N/mm<2> to 18N/mm<2>, the breaking strength of 12N/mm<2> to 28N/mm<2> and the breaking elongation of 120 to 240 percent and meanwhile, can be subjected to biodegradation and therefore, an environment cannot be polluted.

The invention relates to a radicalized nanowire growing on the surface of a C/C-Si composite material and a preparation method at the room temperature. An embedding method is adopted to prepare a silicon coating on the surface of a carbon/ carbon composite material in a vacuum heating furnace, after the C/C-Si composite material is soaked by adopting a concentrated sulfuric acid and hydrogen peroxide mixed solution, the surface of the C/C-Si composite material is put into a monodisperse polystyrene microsphere solution, and after drying is carried out, metal spraying is carried out in a metalspraying sputtering instrument; then the C/C-Si composite material is put into a mixed solution composed of deionized water, glycerol, hydrogen peroxide and hydrofluoric acid by volume and etched at different time, and a Si nanowire growing radially on the surface of the C/C-Si composite material at the room temperature. The nanowire is the radicalized nanowire growing from the surface of the C/C-Si composite material, the binding force between an internal coating and an external coating can be improved, the thermal expansion mismatch is relieved, the decline of the mechanical performance caused by high-temperature processing for multiple times on the carbon/ carbon composite material can be reduced, so that the carbon/ carbon composite material can be effectively protected.

The present invention provides a three-phase nanometer emulsion having a core-shell structure, wherein the three-phase nanometer emulsion comprises, by weight, 25 parts of water, 20-50 parts of an organic solvent, 1-20 parts of a nanometer core solution, 1-20 parts of a nonionic surfactant, 1-10 parts of an anionic surfactant, and 0-15 parts of an inorganic salt. The invention further provides a preparation method of the three-phase nanometer emulsion. The preparation method comprises: 1) dissolving a nonionic surfactant and an anionic surfactant in an organic solvent to obtain an oil phase; 2) adding a certain amount of a nanometer core solution to the oil phase obtained in the step 1), and carrying out constant temperature treatment to obtain a transition body having an oil core structure; and 3) mixing a certain amount of the nanometer core solution, an inorganic salt and water to obtain a water phase, and mixing the water phase and the transition body obtained in the step 2) to obtain the three-phase nanometer emulsion having the core-shell structure. The invention further relates to applications of the three-phase nanometer emulsion in the field of well drilling.

The invention relates to the technical field of silicon carbide products and in particular relates to a silicon carbide push plate. The silicon carbide push plate is prepared from the following raw materials: 15 to 30 percent of silicon carbide micro-powder, 5 to 20 percent of elemental carbon powder, 10 to 30 percent of silicon carbide nano-powder, 5 to 18 percent of alpha-active aluminum oxide micro-powder, 5 to 12 percent of graphite nano-powder, 1 to 3 percent of ceramic micro-bead fine powder, 1 to 3 percent of carbon fiber, 1 to 4 percent of coal asphalt and 2 to 5 percent of an organicbinding agent. The silicon carbide push plate provided by the invention has strong commonality and can be used for high-temperature, medium-temperature and low-temperature kiln furnaces at the same time; the silicon carbide push plate has the advantages of strong corrosion resistance, low coefficient of thermal conductivity and the like and has a wide application prospect.

The invention provides a three-dimensional steel fiber which is characterized in that the three-dimensional steel fiber is composed of a plurality of arc sections and linear sections, the linear sections in the X-axis direction are connected with the linear sections in the Y-axis direction and the linear sections in the Z-axis direction through the two arc sections respectively, and a main body part is formed. In order to improve anchoring of the fiber in the base body, anchoring sections can be arranged at the two ends of the fiber, each anchoring section can be composed of one or more continuously-arranged end hooks, and each end hook is composed of one large arc section and one linear section. The SIFCON is a steel fiber with a three-dimensional size, three-dimensional distribution can be effectively formed in a mold no matter how a feeding process is adopted, so that the prepared SIFCON can play a good resisting role no matter in which direction the SIFCON is stretched or compressed, the bonding strength with a base body is obviously improved, and the service life of the SIFCON is prolonged. The mechanical property and the elastic shock wave resistance are greatly improved.

The invention belongs to the technical field of prevention and control of harmful algal blooms, and particularly relates to a method for improving the efficiency of treating harmful algal blooms by clay based on microbial compound modification. Some microorganisms are gathered and solidified on the surface of clay (or modified clay) according to a certain proportion under a certain condition, the local concentration of the microorganisms and the algae removal characteristic of the surface of the clay (or modified clay) are increased, the inhibition effect of the microorganisms and the clay (or modified clay) on microalgae is enhanced, and a composite modified clay system with the 1 + 1 > 2 effect is formed. The method has the advantages that the algae removal efficiency of the original clay or the modified clay can be improved, the decomposition of algal blooms and other organic matters in water can be effectively accelerated, and the effect of further purifying water is achieved.