32results about How to "Adjust mechanical strength" patented technology

The invention discloses a near-infrared light-responsive intelligent hydrogel bionic arm and a preparation method thereof. The hydrogel bionic arm is formed by connecting three sections of hydrogel with different functions through in-situ free radical polymerization. The hydrogels are respectively: I-extending segment, II-contracting segment and III-grabbing segment, the hydrogel bionic arm can capture the target object through viscosity or magnetism; the intelligent hydrogel bionic arm can The bionic actions of elongation, object capture, and retrieval are realized under irradiation; the preparation method of the near-infrared light-responsive smart hydrogel bionic arm is as follows: the components of the above three sections of hydrogel are respectively dispersed in water, and the trigger Agents, according to the order of I‑II‑III or III‑II‑I, were added to the mold and sealed, and placed in an environment of 10~25 oC to react for 12‑48 hours to obtain a near-infrared light-responsive smart hydrogel bionic arm .

The invention discloses a self-driving dopamine gel driver, a preparation method and a driving manner thereof. The dopamine gel driver is prepared in the manner of copolymerizing dopamine methacrylamide and acrylamide monomers into a gel, soaking the gel in a Fe3+ solution for treating and then acquiring a fixed temporary shape in an alkaline solution. The dopamine gel driver can realize the driving function of automatically changing the shape of the hydrogel in the solution according to the method of changing the pH value of the solution.

The invention belongs to the technical field of polymer materials, and relates to a linear azobenzene polymer containing hydrogen bonds and a preparation method and application thereof. The polymer molecular chain has a linear structure, the azophenyl element is located in the polymer main chain, and there is a hydrogen bond physical cross-linking provided by the urethane bond between the molecular chains. Compared with the prior art, the hydrogen bond-containing linear azobenzene polymer proposed by the present invention has simple synthesis steps, can be processed by melting and solution methods, and has unlimited molding size and shape, and can be recycled and reused after processing and molding. . Pre-edited or unedited after molding, polymers change shape when exposed to specific wavelengths of light. In addition, this polymer can greatly control its mechanical and light-responsive deformability by adjusting the spacers on both sides of the azobenzene and the structure of the diisocyanate.

The invention discloses a method for preparing organosilicone hybrid resin and a power type encapsulating material for light-emitting diodes (LED) thereof and application. According to the method, the organosilicone hybrid resin containing three functional groups of an epoxy group, a fluorin group and a phenyl group is prepared by a cohydrolysis condensation method, and the content of each group in the resin is optimized by controlling the ratios of fluoro alkyl silicane, epoxy alkyl silicane and phenyl silicane, so that the resin is applied to the power type encapsulating material for the LEDs. The prepared encapsulating material has the advantages of epoxy resin and organosilicone, has high performance of high light transmittance and refractive index, low hygroscopicity, high mechanical property and ageing-resistant performance and the like, and the problems of low light output rate, short service life and the like of the LEDs due to dropping caused by low bonding strength and poor mechanical property of the ordinary organosilicone material for encapsulating LEDs are solved. The method for preparing the organosilicone hybrid resin and the power type encapsulating material for the LEDs is simple, and raw materials are readily available and environment-friendly; and the organosilicone hybrid resin can also be used as the raw materials to be applied to processing and preparation of optical lens materials, photovoltaic conversion materials, integrated circuit encapsulating materials, insulating materials, coating materials, adhesives and the like.

The invention belongs to the technical field of fertilizer preparation and discloses a preparation method of a konjac flying powder-coated fertilizer. The method is characterized by comprising the following steps: (1) selecting raw materials according to the ratio of konjac flying powder to polyvinyl alcohol to water to glycerinum of (3-12)g:15g:300g:9g; (2) pouring the selected polyvinyl alcohol, water and glycerinum into a kneading machine; (3) adding the konjac flying powder to obtain a mixture; (4) extruding the mixture obtained in the step (3) through a screw of the kneading machine, containing the mixture in a polyethylene tray, immediately carrying out curtain coating until the solution is uniformly paved on the tray; (5) carrying out forced air drying on the tray containing the mixture obtained in the step (4) at 50-80 DEG C for 2-3h and forming a film from the mixture in the tray; (6) removing a film to obtain the film which is 0.12-0.2mm in thickness; (7) carrying out film cutting and sealing to prepare a coated fertilizer bag; and (8) carrying out fertilizer filling and sealing to obtain the required konjac flying powder-coated fertilizer. According to the method, the problem of shortage of a deep process technology of the konjac flying powder can be solved, and a factory technology is provided for production of the konjac flying powder-coated fertilizer.

The invention relates to a dental device (1) for ridge preservation around the socket (2) of an extracted tooth and for promoting jaw bone regeneration inside the socket (2) of the extracted tooth, the dental device (1) comprising: a screw (3) which is entirely made of a biodegradable material to eliminate the need for a removal surgery, wherein the screw (3) is adapted for tight fixation within the jaw bone (4) in the socket (2) to prevent micromovements during bone-tissue regeneration, wherein the screw (2) has a length such that its top is, in the inserted state, flush with the alveolar ridge (5) around the socket (2) to promote full bone regeneration inside the socket (2), and wherein the screw (3) has a hollow (6) and pores (7), wherein the diameters of the pore (7) is substantially equal to or larger than 20 micrometers.

The invention discloses a double-layer hydrogel bionic hand and a preparation method thereof. The double-layer hydrogel bionic hand is formed by bonding a layer of polyacrylic acid hydrogel with pH responsiveness and viscidity and a layer of Fe<3+> cross-linked polyacrylic acid hydrogel through the viscous effect; the double-layer hydrogel bionic hand can be similar to a human hand to achieve bionic actions of hand closing and opening through a method of changing the pH values and ionic strengths of solutions in the solutions with the different pH values, and the effects of grabbing and releasing objects are achieved.

The invention discloses a high-performance aluminum alloy for power transmission and transformation equipment. The high-performance aluminum alloy for the power transmission and transformation equipment comprises the following components of, by mass, 0.45%-0.90% of Mg, 0.50%-1.20% of Si, 0.20%-0.60% of Cu, 0.15%-0.35% of Cr, less than or equal to 0.5% of Fe, 0.15%-0.35% of Mn, 0.04%-0.15% of Ti, less than 0.20% of Zn, and the balance Al; the invention further discloses a preparation method of the aluminum alloy, the preparation method comprises the following steps that A, a cast ingot is cast;B, the cast ingot is homogenized; C, a rolling process is carried out, heat machining is conducted on the cast ingot to form a pre-machined workpiece; D, solid solution heat treatment is conducted onthe workpiece; E, quenching is conducted; and F, artificial aging is conducted to obtain a finished product. The alloy and the method further have the characteristics of being high in elongation while high in strength at the same time.

The invention relates to a porous active artificial bone. In the porous active artificial bone, a calcium phosphate-based biological ceramic material is used as a matrix, and the porous active artificial bone comprises small pores, dense parts and directional pore channels and chelates with diphosphonate. A preparation method of the porous active artificial bone comprises the steps of preparing calcium phosphate precursor powder, compression molding a ceramic blank by using a pore-foaming agent, polyester fiber and the precursor powder, high temperature sintering into a calcium phosphate-based ceramic sintered body and forming the dense parts, the small pores distributed alternately; and immersing calcium phosphate-based ceramic sintered body in a diphosphonate solution to chelate with the diphosphonate so as to obtain the drug-loaded porous active artificial bone. The artificial bone provided by the invention has longitudinal directional pores and a porous structure suitable for osteoblast migration, propagation and growth metabolism, can slowly release small molecular drugs capable of promoting the growth of the osteoblast and inhibiting osteoclast, and is particularly suitable for the fields of treating bone defects of osteoporosis patients, dental restoration, and the like.