42results about How to "Mechanical properties can be adjusted" patented technology

The invention relates to a mechanical energy absorption metamaterial based on a buckle structure and a production method of the mechanical energy absorption metamaterial, wherein the metamaterial comprises a plurality of single-layer mechanical metamaterials which are arranged in an array; every two adjacent single-layer mechanical metamaterials are arranged in a mirror image way and are fixedly connected by a hard partition plate, wherein each of the single-layer mechanical metamaterial comprises a matrix provided with a plurality of independent buckle grooves side by side along a length direction, and a flexible connecting beam is formed in a position, between every two adjacent buckle grooves, on the matrix; each of the buckle grooves comprises a buckle and a clamping groove which are matched with each other and are spaced for a fixed distance; each of the single-layer mechanical metamaterials is made of a flexible elastomer; each of the single-layer mechanical metamaterials comprises a first stable state that the buckle is separated from the clamping groove and a second stable state that the buckle is combined with the clamping groove; when a load applied by the outside reaches the maximum value of mechanical energy absorption, each of the single-layer mechanical metamaterials can be switched from the first stable state to the second stable state; and when a load with an opposite direction is applied, each of the single-layer mechanical metamaterials can be restored to the first stable state.

The invention discloses a multi-layer gradient biofilm and a preparation method thereof. The biofilm is prepared through an electrostatic spinning method, and then the biofilm is formed through processes such as drying, cross-linking, and sterilization. The composition and structure of the nanofiber biofilm show gradient changes. The gradient structure biofilm is constructed by changing the ratio of gelatin and polycaprolactone, and the mechanical properties and degradation behavior can be adjusted. The upper and lower layers of the biofilm have synchronously guided softness, function of hard tissue regeneration. The gradient biofilm has controllable mechanical properties, degradation behavior and good biocompatibility, and can simultaneously induce soft and hard tissue regeneration, and has application prospects in the field of guided tissue regeneration.