30results about How to "Has shape memory effect" patented technology

The invention relates to NxMy high-entropy alloy with a shape memory effect and a preparing method thereof. The alloy comprises NxMy, wherein x is larger than or equal to 45 and smaller than or equal to 55, y is larger than or equal to 45 and smaller than or equal to 55, the N is any two or more of Ti, Zr, Hf, V, Nb, Ta, Mo and W and the M is any two or more of V, Mn, Fe, Co, Ni, Cu, Cr and Zn; and the content of the Ti, the content of the Zr, the content of the Hf, the content of the V, the content of the Nb, the content of the Ta and the content of the Mo in the N are each larger than or equal to 5% and smaller than or equal to 35%, and the content of the V, the content of the Mn, the content of the Fe, the content of the Co, the content of the Ni, the content of the Cu, the content of the Cr and the content of the Zn are each larger than or equal to 5% and smaller than or equal to 35%. A body-centered cubic single-phase solid solution with the volume fraction not lower than 95% and an intermetallic compound form the alloy phase structure. The alloy is prepared through an electric arc melting method. The alloy has the shape memory effect within a wider temperature range and meanwhile has the high-entropy alloy feature. The NxMy high-entropy alloy and the preparing method have wide application prospects in the fields of aerospace, mechanical electronic products and low-temperature industries.

The invention discloses novel non-magnetic stainless steel which consists of the following components in percentage by weight (% hereinafter being percentage by weight): 0.15%-0.21% of carbon, 3%-5% of nickel, 8%-13% of chromium, 8%-11% of manganese, 4%-5% of silicon, 0.48%-0.65% of niobium, 0.13%-0.47% of vanadium, 1.2%-1.7% of molybdenum, 3%-4% of titanium, 0.27%-0.33% of rare earth, less than or equal to 0.035% of phosphor and sulfur, and the balance of iron and other inevitable impurities. Based on the original non-magnetic stainless steel, the novel non-magnetic stainless steel has highly improved mechanical performance by changing alloy components and adding a novel component; meanwhile, the structural texture of steel is changed by changing a preparation process and controlling the parameters in the process, so that the obtained steel is good in various performances, high in corrosion resistance, good in shape memory effect and especially suitable for pipeline connection on ships and warships.

The invention relates to a shock absorption damping device for a bridge cable or suspender. The device comprises a sleeve and a shock absorption ring, wherein the sleeve is sleeved on the cable or suspender; a space exists between the inner side wall of the sleeve and the cable or suspender; and the shock absorption ring is made from shape memory alloy and located between the sleeve and the cable (or suspender). In the shock absorption damping device provided by the invention, as the shock absorption ring is made from shape memory alloy which has excellent characteristics such as shape memory effect, super elasticity and the like, the energy consumption performance and great-deformation self-recovery ability of the shock absorption cable (or suspender) device can be enhanced, and a good durability is obtained at the same time. The shock absorption ring is located between the cable (or suspender) and the sleeve to form a damping structure system with the sleeve, thereby improving the vibration damping of the cable (or suspender) and effectively suppressing vibration caused by various excitations. Moreover, the shock absorption damping device also has the advantages of simple structure, long service life and the like, and is convenient to construct and maintain and easy to manufacture and mount.

The invention relates to a preparation method and a driving method of shape-memory polycaprolactone foam. The invention relates to the field of functional polymer materials, in particular to the preparation method and the driving method of the shape-memory polycaprolactone foam. The invention is intended to solve the problems of complex process, low production efficiency, high cost and uneasy control existing in conventional preparation methods. The preparation method includes the following steps: (1) polycaprolactone is dissolved into dichloromethane, stirring is performed at room temperature until the polycaprolactone is dissolved completely, benzamide peroxide is then added, stirring is performed at room temperature until the benzamide peroxide is dispersed uniformly, and thereby polycaprolactone solution is obtained; (2) the polycaprolactone solution obtained in step 1 is poured into a mold, and is then put into a microwave oven to be heated, and thereby the shape-memory polycaprolactone foam is obtained. The driving method is as follows: under the condition of microwave heating, the shape-memory polycaprolactone foam can be restored to an initial shape within 98s.

The invention discloses a 4D printing photosensitive resin based on a dynamic covalent bond and a preparation method thereof. The photosensitive resin is a reaction product of a dihydric mercaptan, a (meth)acrylate monomer containing an isocyanate group, and a photoinitiator. The preparation method of the photosensitive resin comprises the following steps: After mixing a certain proportion of dihydric mercaptan, (meth)acrylate containing isocyanate group and catalyst, reacting at room temperature for 1 to 3 hours, and then adding photoinitiator , to obtain a remodelable, degradable and recyclable, high-strength 4D printing photosensitive resin. The entire synthesis process does not involve the use of solvents. The photosensitive resin of the present invention utilizes the dynamic reversibility of the thiourethane bond to achieve remodeling and degradation. Recycling , using the double bond radical polymerization in (meth)acrylate to realize photocuring 3D printing, and using the shape memory effect of the material to realize 4D printing.

An expandable landing ladder with shape memory effect relates to the aerospace field. The invention aims to solve the problem that the existing landing ladder has a complex structure and a large weight, which causes a large weight to be carried during launch. Two Ω-shaped shape-memory composite beams butt joints, the shape-memory foam is filled in the gap between the two Ω-shaped shape-memory composite beams, and the inner surfaces of the two Ω-shaped shape-memory composite beams are pasted with A resistive heating sheet, a resistive heating sheet, is used to raise the temperature of the Ω-shaped shape-memory composite beam above its glass transition temperature in the energized state, so that the Ω-shaped shape-memory composite beam expands, and the shape-memory foam Being compressible, shape-memory foam is used to provide additional load-carrying capacity for the deployment of Ω-shaped shape-memory composite beams. It serves as an important bridge between the lander and the planet's surface.

The invention relates to an insect sticking glue for tree trunks, and belongs to the technical field of diseases and insect pests prevention and treatment. A hydrogen-bond-reinforced tear-resistant shape memory hydrogel base material is synthesized with polyethylene glycol, N,N-dimethylacrylamide and other raw materials, the base material has good tensile properties, and the good tensile resistance effect can be realized without the need for external additives to realize driving; an added self-made auxiliary agent has an amphiphilic property, and vesicles can be formed in the system by self-assembly of the auxiliary agent, and an environment-friendly multi-related insect sticking glue system is formed through relations of environment-friendly insect sticking and insecticidal effects, photosynthesis of plants and the growth of the vesicles; and longicorn beetles are subjected to the pretreatment culture to stimulate the secretion of gastric juice and hormone-like compounds in vivo, themildew of the insect sticking glue is avoided by the cooperation with a porous structure of the colloid, and then the high tensile resistance and the environment-friendly performance can be maintainedfor a long time. The problems of poor tensile resistance and poor environment-friendly performance of commonly used insect sticking glues at present are solved.

The invention relates to a tin-silver-zinc self-adapt leadless solder with shape memory function and relative preparation, wherein in the tin-silver-zinc leadless solder whose purity is 99.99% and mass percentages are 96.5-93: 3.0-4.5: 0.5-2.5, there is silver-zinc metal phase with shape memory function; then it adds 0-2.5 gallium and 0-4 indium to improve humidity. The invention uses the silver-zinc thermoelasticity martensite of solder to obtain shape memory function. And it has compact combination and uniform distribution, compared with nickel-titanium alloy leadless solder.

The invention provides a landing ladder having the dual functions of unfolding and take-back. The landing ladder comprises a main ladder structure, a locking mechanism and a rotary take-back mechanism; the main ladder structure has a shape memory effect and comprises a first end and a second end; the rotary take-back mechanism is connected with the first end and drives the first end to rotate; thelocking mechanism is detachably connected with the second end and locks or unlocks the second end, wherein the main ladder structure can be unfolded or taken back and is curled at the first end or the second end when the locking mechanism locks the second end, and the main ladder structure is unfolded when the locking mechanism unlocks the second end. The main ladder structure is matched with thelocking mechanism and the rotary take-back mechanism to realize unfolding and curling, and the problems are solved that in a traditional design, mass is large, and the structure is complex.