36results about How to "Meet the requirements of different applications" patented technology

The invention relates to a preparation method of a porous scaffold material and discloses a preparation method of a nano-fibrous silk fibroin-based porous scaffold. The preparation method comprises the following steps: blending a silk fibroin solution and a collagen solution under the temperature of 0-20 DEG C, standing to ensure the complete reaction of collagen and silk fibroin and generate nano-fiber; freezing the mixed solution to obtain a freezing body; performing freeze drying treatment on the freezing body to obtain a nano-fibrous porous scaffold material; and placing the nano-fibrous porous scaffold material in a vacuum drier with water and methanol, or an ethanol aqueous solution at the bottom, vacuumizing, and then standing to obtain the water-insoluble nano-fibrous porous scaffold. The obtained porous scaffold has 10-1000 microns of communicated pores. The pore walls consist of 10-100nm of nano-fibers; and the porous scaffold has similar nanoscale structures and micronscalestructures to extracellular matrix, is suitable for the adhesion and growth of cells and has good biocompatibility.

The invention relates to a cascaded-bistable-mechanism-based tri-stable or quaternary-stable mechanism and a changing method thereof, and belongs to the technical field of electromechanical systems and devices. The cascaded bistable mechanism is formed by an upper-end bistable mechanism and a lower-end bistable mechanism through a connecting rod and a connecting groove and then connected with a framework, and a positioning rod moves along the vertical direction; when the acting force of the upper-end bistable mechanism on the positioning rod is changed, the positioning rod is balanced at a second stable position under the support of the lower-end bistable mechanism; and when the upper-end bistable mechanism and the lower-end bistable mechanism skip simultaneously, the positioning rod reaches a third stable position. By adjusting the relative positions of the connecting rod and the connecting groove as well as the length of the connecting groove, the changing method changes the travel distance and the logical relation, i.e. a is lower than or equal to c which is equal to b or a is lower than or equal to c which is unequal to b, thus realizing the function transference between tri-stable state and quaternary-stable state. The mechanism has a simple structure, avoids friction and achieves adjustable quantities and positions of the stable states, thus being applicable to multiway switches and multi-stage variants.

The invention relates to the field of food packaging, and particularly provides a polylactic acid / starch high-barrier composite film and a preparation method thereof. The film is of a sandwich structure; a polylactic acid layer is an outer layer; a sandwich layer is a starch nano composite material layer, and the thickness of the sandwich layer is 50 to 90 percent of the whole composite film. The composite film adopting the structure is high in mechanical performance, biodegradability, flexibility, water resistance and heat sealability and excellent in gas barrier property, can be widely applied to the field of packaging of fresh agricultural products, high-oil-content food and other oxidization-liable products and packaging and application of supermarket shopping bags, garbage bags.

The invention discloses an efficient multipath laser probe detecting system and method. The detecting system can divide laser sources into multiple paths and transmit the laser sources to multiple to-be-detected points through optical fibers, corresponding spectral signals are transmitted back to the detecting system after laser plasma is generated through excitation, finally, multi-point and simultaneous on-line detection by one laser probe instrument is finally realized, the optical fibers are used for transmitting laser and the spectral signals, accordingly, the anti-jamming capability of a laser probe in the severe environment can be improved, and the application cost of the laser probe instrument can be substantially reduced. The efficient multipath laser probe detecting system is particularly suitable for a large industrial process containing multiple production lines, has the on-line monitoring capability for multiple elements of a product on the production lines and facilitates popularization and generalization of a laser probe technology, and the application cost of the laser probe instrument can be substantially reduced.

The invention discloses a cationic polymerization method. The method comprises the following steps that on the solution polymerization condition, monoolefine shown in the formula II and conjugated diene shown in the formula II make contact with components in an initiator system in a polymerization solvent, the initiator system contains compounds capable of providing carbocation, lewis acid and an activating agent, the activating agent is selected from a compound shown in the formula I-1 and a compound shown in the formula I-2. Compared with a simple C+ / lewis acid initiator system, the initiating efficiency of the method is remarkably improved, and the higher polymer yield can be obtained at the higher polymerization rate; polymers of different molecular weights can be obtained on different polymerization conditions by adjusting the content and varieties of the activating agent in the initiator system; in addition, the method can perform polymerization under the higher temperature, and energy consumption in the polymerization reaction process is effectively lowered.

The invention discloses a new method for preparing shape-controllable high polymer nanospheres and nanorods by virtue of an ultrasonic-assisted soap-free click polymerization reaction. The method comprises the following steps: dissolving a certain amount of acetenyl pyridine and polyazido crosslinking agent in a proper solvent; with Cu(PPh3)3Br as a catalyst, performing click polymerization by controlling the ultrasonic frequency and reaction temperature to obtain polymer nanospheres or nanorods with clickable functional group on the surface. According to the method disclosed by the invention, the polymer nanospheres and nanorods are prepared by virtue of ultrasonic-assisted click polymerization, a surfactant is not required in the polymerization process, and the process is environment-friendly; the shape of the prepared polymer nanoparticles can be selectively controlled by changing the solvent system and the ultrasonic assist mode; meanwhile, with clickable azido and alkynyl on the surfaces of nanoparticles, further functionalization is facilitated, and the method has broad application prospect in the fields of new material preparation, drug delivery, fluorescence imaging and the like.

The invention relates to the field of food packaging and in particular provides a polyhydroxyalkanoate / starch high-barrier composite membrane and a preparation method of the polyhydroxyalkanoate / starch high-barrier composite membrane. The membrane adopts a sandwiched structure and takes a polyhydroxyalkanoate layer as an outer layer; a sandwiched layer is a starch nano composite material layer; the thickness of the sandwiched layer accounts for 40 percent to 90 percent of the whole composite membrane; the composite membrane with the structure has good mechanical properties, biodegradability, flexibility, water resistance, heat sealing property and ultra-strong gas barrier performance and can be widely applied to packaging application fields including packaging of fresh agricultural products, packaging high-oil foods, packaging of other products which are easy to oxidize, supermarket shopping bags, garbage bags and the like.

The present application relates to foldable display devices. The display device includes a flexible display screen and a support body, the support body includes a plurality of first grooves and a plurality of second grooves, wherein the position where the plurality of first grooves are located is the first folding position, and the plurality of second grooves The position where the slot is located is the second folded position, and the foldable display device has a first folded state in which the display surface is wrapped in the support body, or the foldable display device has a second folded state, In the second folded state, the display surface is exposed outside the support body, or the foldable display device has a third folded state, in which a part of the display surface is wrapped in the support body, and the rest is exposed to the support body outside the subject. In this solution, the folding modes of the flexible display device are more diverse, which can meet the requirements of various applications of the foldable display device, and improve the folding flexibility of the foldable display device.

A friction type torque converter comprises an inner ring (1), large rolling columns (2), and an outer ring (3). The inner ring (1) is an input unit, and at least two grooves (101) being uniformly provided on a peripheral ring surface of the inner ring (1), each groove (101) corresponding to one large rolling column (2). The outer ring (3) is an output unit, the outer ring (3) sleeves the inner ring (1) and is coaxially arranged with the inner ring (1), and an outer ring inner rolling way is formed in an inner side circumferential surface of the outer ring (3) to fit each rolling column (2, 4). When a rotating speed and a load are changed, the rolling columns (2, 4) can adaptively work under the co - action of a centrifugal force and the inner ring (1) to finally realize locking output, automatic speed change and torque conversion of the friction type torque converter , so as to satisfy different applications.

The invention discloses a cationic polymerization method. The method includes the step that under the solution polymerization condition, monoolefine shown in the formula II and conjugated diene shown in the formula III make contact with all components in an initiator system in a mixed solvent composed of alkane and haloalkane, wherein the initiator system contains a compound capable of providing protons, lewis acid and an activating agent, and the activating agent is selected from a compound shown in the formula I-1 and a compound shown in the formula I-2. Compared with a pure H+ / lewis acid initiator system, initiation efficiency of the method is obviously improved, and the higher polymer yield can be obtained at higher polymerization speed. Polymers with different molecular weights can be obtained under different polymerization conditions by adjusting the content and the variety of the activating agent in the initiator system. Besides, the method can achieve polymerization at higher temperature and effectively reduce energy consumption in the polymerization reaction process. Please see the formulas in the description.

The invention provides a stretchable friction nanogenerator in a single electrode mode and a preparation method thereof. The stretchable friction nanogenerator comprises: organic silicon rubber serving as as a friction material; a spiral steel wire formed in the organic silicon rubber and extending out from one end of the organic silicon rubber, wherein the spiral steel wire is used as an electrode material; and the spiral steel wire is configured to match with the Young modulus of the organic silicon rubber. According to the scheme provided by the invention, the spiral steel wire is used as the electrode material, due to the firmness, the continuous conductivity and the geometric structure of a steel wire electrode, the friction nanogenerator based on the spiral steel wire has high stability, stretchability and customizability. Furthermore, the silicon rubber substrate has good tensile properties, and its properties remain unchanged after being twisted, bent or stretched, thereby being able to meet the requirements of different applications, and being suitable for use on wearable electronic devices.

The invention relates to an application synchronization and release method and system based on a cloud environment. The method comprises the following steps of generating an on-line code; extracting the on-line code to a configuration file; extracting production host information corresponding to the on-line code, and transferring the production host information to a corresponding production host; performing backup on the on-line code; covering the on-line code after backup; checking the on-line code, and outputting a code check log; restarting a corresponding application; checking the restarted application, and outputting an application check log; and jumping to a release host, and executing circularly until the extraction of all production host information corresponding to the on-line code in a production configuration is completed. According to the application synchronization and release method based on the cloud environment provided by the invention, upload, check, application restart and application check of a plurality of production host codes are supported through one program; and the code upload accuracy and efficiency can be guaranteed, manual intervention in the code upload and application restart process can be reduced, and the on-line success rate can be guaranteed.