8 results about "Self reinforced" patented technology

This invention discloses a preparation method and application of Al2O3 self-reinforced zirconia medical ceramic material, belonging to the field of bioceramic material preparation. The preparation method includes the following steps: first, aluminum particles are surface passivated, then mixed with Y2O3-ZrO2 ceramic powder, a dispersant, and a binder to prepare a slurry; the slurry is obtained through spray granulation and dry pressing; finally, the finished product is obtained through atmosphere sintering, oxygen absorption reaction, and high-temperature sintering. This invention utilizes the volume expansion effect of in-situ generated Al2O3 to artificially introduce a beneficial local compressive stress field into the zirconia matrix, effectively compensating for the phase transformation strengthening effect lost due to increased yttrium oxide content. This achieves a synergistic improvement in the mechanical properties and anti-aging properties of zirconia all-ceramic materials, solving problems such as insufficient anti-aging performance of existing zirconia all-ceramic materials, significant strength decrease after adding yttrium oxide, and insufficient strengthening effect of traditional Al2O3 second-phase addition.

The application discloses a self-reinforced sound-absorbing cement-based material and a preparation method and a mix proportion design method thereof, and belongs to the technical field of sound-absorbing cement-based materials. A self-reinforced sound-absorbing cement-based material is composed of the following components in parts by weight: 600 parts of cement, 300 parts of water, 30 parts of expanded perlite, 6 parts of a high-efficiency water reducing agent, 4.8 parts of a composite foam stabilizer, 75-800 parts of a functional foam material, 0.019-0.2 parts of an initiator and 0.01-0.1 parts of an accelerator. The cement-based sound-absorbing material of the application has an increasingly enhanced alkaline environment in the material with the continuous cement hydration reaction; the high polymer film responds to the endogenous high-alkaline environment and slowly chemically degrades; with the gradual rupture and dissolution of the film, the original closed pores are opened and converted into open pores in mutual communication; the gradually opened pore structure converts the pores into through holes, and the sound-absorbing function of the material is gradually enhanced; and finally, excellent sound-absorbing effect is achieved.

The invention relates to the technical field of polymer composite material preparation and forming technologies, in particular to a self-reinforced polypropylene composite board as well as a continuous forming preparation method and application thereof. The self-reinforced polypropylene woven cloth is stacked and preheated, and preheated woven cloth is obtained; the preheated woven cloth is clamped by a mirror-polished or frosted matte steel belt to sequentially pass through four temperature zones, and the self-reinforced polypropylene composite board is obtained; the temperatures of the four temperature zones are as follows: the temperature of the first zone is 100-130 DEG C, the temperature of the second zone is 130-170 DEG C, the temperature of the third zone is 100-130 DEG C, and the temperature of the fourth zone is 50-100 DEG C; and the pressure of each of the four temperature zones is 0.5-5 MPa. Continuous production of homogeneous laminated boards or sandwich structure boards can be achieved, the problems that a traditional process is low in efficiency, uneven in product thickness, poor in appearance and the like are effectively solved, and the obtained boards are small in thickness deviation (smaller than + / -5%), smooth in surface and excellent in mechanical property.

The invention relates to the technical field of high polymer materials, in particular to a low-frequency response degradable self-reinforced piezoelectric composite material and a preparation method thereof. The self-reinforced piezoelectric composite material is prepared from the following components: stereocomplex polylactic acid and hydroxyapatite, the content of the hydroxyapatite is 5-30 wt% of the content of the stereocomplex polylactic acid; the low-frequency response degradable self-reinforced piezoelectric composite material has a mesoporous structure. The crystal of the degradable self-reinforced piezoelectric composite material with low-frequency response is a 100% stereocomplex crystal, and has excellent piezoelectric property.

The invention relates to the technical field of high polymer materials, and discloses a polypropylene material, a tower and a preparation method. The polypropylene material is a self-reinforced polypropylene composite material with a core-shell structure, a reinforced phase is composed of highly oriented polypropylene with a high melting point, and a matrix phase is composed of polypropylene with a low melting point. The tower is integrally formed by the polypropylene material through a thermoplastic composite material winding forming process. The invention also provides a preparation method of the polypropylene material prepreg tape and the tower. By the adoption of the technical scheme, good mechanical performance, corrosion resistance, light weight, recoverability and efficient manufacturing can be achieved.

The present application relates to the technical field of bionic composite materials, in particular to a low-temperature impact-resistant self-reinforced polypropylene bionic composite material, a preparation method and application thereof. The low-temperature impact-resistant self-reinforced polypropylene bionic composite material is prepared from n layers of polypropylene woven fabrics, n is greater than or equal to 4, and has a corrugated layered "horn" structure. The polypropylene woven fabric is woven from flat filaments, and the flat filaments have a skin layer, a core layer and a skin structure. The polypropylene bionic composite material of the present application uses polypropylene material for the whole structure, uses the core layer of the polypropylene flat filament as a reinforcing body, and uses the skin layer of the polypropylene flat filament as a matrix to bond each flat filament and each structural layer, so that the whole structure of the composite material can be recycled, the recycling difficulty is significantly reduced, the material recycling rate is effectively improved, and the good interface and interlayer bonding of the self-reinforced polypropylene composite material are realized, and the low-temperature impact resistance is significantly improved.

A low-vacuum escaping, self-reinforced composite material for space deployment structure and a preparation method thereof belong to the field of materials for space environment. The method is as follows: vinyl imidazole is reacted with zinc chloride, and gradually a precipitate is generated in the solution system as the reaction proceeds, the precipitate is obtained after suction filtration, and the precipitate is dried to obtain a latent curing agent. After the photoinitiator, the latent curing agent, the acrylate resin and the epoxy resin are mixed, vacuum is applied to remove bubbles, the mixture is poured into a mold, and the mixture is irradiated by ultraviolet light for 10-40 minutes to obtain a one-stage flexible material; a two-stage epoxy resin curing agent is added to the one-stage acrylate network, and the flexible material is cured at a temperature of 170-250 DEG C for 2-6 h to prepare a rigid material. The synthesized latent curing agent contains a coordination bond Zn-N bond, which can passivate the reactivity with the epoxy resin, and therefore can be used as an epoxy resin latent curing agent.

The invention discloses a ZIF8-based self-reinforced composite material, an electrochemiluminescence-electrochemical aptamer sensor and a preparation method and application thereof, a novel self-reinforced electrochemiluminescence composite material (Ru-N-at-ZIF8) is designed and prepared by utilizing a one-step self-assembly method, and a luminous body (Ru (dcbpy) 3 < 2 + >) and a co-reactant (NGQDs) are simultaneously wrapped in the same material (ZIF8), so that the electron transfer distance is shortened, and the electrochemical luminescence-electrochemical aptamer sensor has the advantages that the electrochemical luminescence-electrochemical aptamer sensor is more stable in performance. The electrochemical luminescence efficiency is obviously improved. The self-enhanced electrochemical luminescence-electrochemical dual-mode aptamer sensor based on the Ru-N-coated ZIF8 is used for detecting acetamiprid, the linear range of electrochemical luminescence and the linear range of electrochemistry are both 1 pM to 100 nM, and the detection limits are 0.046 pM and 0.050 pM respectively. The sensor provided by the invention shows better selectivity, and has better reproducibility and stability.