4results about How to "Increase strain" patented technology

This invention discloses a method for preparing a tear-resistant elastic gel, comprising the following steps: adding monomer molecules, a crosslinking agent, and a nano-confined material to a solvent, and performing a polymerization reaction under ultraviolet light irradiation in the presence of a photoinitiator to obtain the tear-resistant elastic gel. This invention utilizes the polymerization of monomer molecules and crosslinking agents initiated by a photoinitiator within the confined space of the nano-confined material. The strong hydrogen bonding between interpenetrating polymer segments effectively immobilizes polymer chains that may slide under load, preventing energy dissipation. Simultaneously, the rigid nano-confined material prevents stress concentration at crack tips in the host material and significantly reduces the crack propagation sensitivity of the prepared gel, thereby improving the strength, strain, crack propagation resistance, and elasticity under ultimate deformation of the gel material, thus obtaining a tear-resistant elastic gel.

This invention discloses a solution-driven collagen-based artificial muscle, its preparation method, and its application. The preparation method of the artificial muscle includes the following steps: dissolving collagen powder in water, adding acetic acid to swell the solution, and mixing thoroughly to obtain a collagen solution; preparing a coagulation bath; adding the collagen solution to the coagulation bath, and obtaining collagen fibers through wet spinning; subsequently, twisting and shaping the obtained collagen fibers to obtain the solution-driven collagen-based artificial muscle. This invention, by combining wet spinning and twisting techniques, prepares a collagen-based artificial muscle with both excellent mechanical properties and good biocompatibility. This muscle exhibits high flexibility, long cycle life, fast response speed, and high strain. The entire preparation process is simple to operate, and the raw materials are inexpensive and readily available.

The application discloses a PZT-based textured piezoelectric ceramic and a phase transition assisted polarization preparation method and application thereof, and belongs to the technical field of piezoelectric materials. The preparation method comprises the following steps: preparing PMeN-PZT matrix powder; preparing a textured piezoelectric ceramic; and sequentially polishing the textured piezoelectric ceramic, sintering silver electrodes and performing phase transition assisted polarization to obtain the PZT-based textured piezoelectric ceramic; wherein the phase transition assisted polarization step is: heating the textured piezoelectric ceramic after sintering silver electrodes to a polarization temperature, the polarization temperature is higher than the trigonal-tetragonal phase transition temperature and lower than the Curie temperature, and the polarization is performed under a polarization electric field of 300 V / mm-1000 V / mm, then the polarization is naturally cooled to room temperature, and the electric field is removed. The technical problems of low piezoelectric / electromechanical / dielectric performance caused by insufficient polarization in traditional heating polarization and the technical problem that piezoelectric materials are difficult to have high piezoelectric performance and high Curie temperature at the same time are solved.

The application provides a high-toughness ferrite-pearlite type non-quenched and tempered steel and a manufacturing method thereof, and the composition of the steel is as follows: C 0.35-0.42%, Si 0.35-0.45%, Mn 1.25-1.65%, P ≤0.010%, S 0.025-0.050%, Cr 0.10-0.30%, Nb 0.02-0.05%, Mo 0.010-0.050%, Ni 0.10-0.25%, Al 0.025-0.045%, V 0.10-0.30%, Cu ≤0.10%, Ti 0.010-0.040%, [N] 120-160ppm, [H] ≤1.0ppm, T.O ≤10ppm; the rest is Fe and inevitable impurity elements; the steel is combined with a controlled rolling and controlled cooling process, the ferrite content is increased, the strength and toughness are improved, the strength and toughness are matched, and the cutting performance is improved.