3results about How to "Stop floating" patented technology

The invention discloses a preparation method of a porous fiber with a nano cellulose fibril stable bubble structure. Comprising the following steps: adding a nanocellulose fibril dispersion liquid and a foaming aid into a polymer solution, mixing, and dispersing the mixed solution to obtain a spinning solution; injecting gas into the spinning solution, and stirring to obtain a bubble type spinning solution; the bubble type spinning solution is subjected to wet spinning to obtain the porous fiber. The nanocellulose fibrils have a diameter of 10 nm or less and a length of 500 nm or more. The porous fiber prepared by the method provided by the invention has an elliptical internal closed-pore structure and high strength. Compared with a traditional solid fiber, the porous fiber shows low volume density and heat conduction efficiency due to the existence of an internal closed-pore structure, so that the thermal insulation performance is better, and the internal closed-pore structure provides more possibilities for functional modification such as phase change capsule coating, nano-particle loading and medicine loading.

The invention discloses a novel composite thermal insulation wallboard and a preparation method, and belongs to the technical field of thermal insulation wallboards, the novel composite thermal insulation wallboard comprises a wallboard main body and an inner skeleton structure arranged in the wallboard main body, and the inner skeleton structure comprises a plurality of outer frames arranged from top to bottom; and a plurality of transverse fiber bundles which are transversely arranged are uniformly bound and fixed on the outer frame. According to the application, the thermal insulation blocks of the thermal insulation material are fixed at the cross points of the transverse fiber bundles and the straight fiber bundles to form a three-dimensional thermal insulation fiber net, so that particles can be effectively prevented from floating upwards when gypsum cement is poured into a template in the process of preparing the thermal insulation wallboard, and the toughness, the tensile strength, the crack resistance and the fracture resistance of the wallboard are enhanced; the gypsum cement material has the reinforcing effect of the three-dimensional fiber heat preservation net, so that the problem that the gypsum cement material shrinks due to rapid water loss and cracks with particles is solved, in addition, the longitudinal steel bars are added, the compressive strength of the wall body is greatly improved, and the bearing capacity is remarkably improved.

The application provides a subcutaneous focusing ultrasonic device, and relates to the field of focusing ultrasonic cosmetic technology, which comprises a handle part, an ultrasonic working head arranged at the distal end of the handle part, the ultrasonic working head being configured to be attached to the surface of human skin and emit ultrasonic pulses to the human skin along a first direction to form an ultrasonic focus in subcutaneous tissue, the first direction being perpendicular to the surface of human skin, a flexible connecting part connected between the handle part and the ultrasonic working head, the flexible connecting part being configured to be able to stretch and contract along the first direction to compensate for the depth deviation of the ultrasonic focus caused by the change of holding pressure, and an adjusting system configured to adjust the length change of the flexible connecting part along the first direction, when the holding pressure on the handle part increases, the adjusting system makes the flexible connecting part contract along the first direction, and when the holding pressure on the handle part decreases, the adjusting system makes the flexible connecting part elongate along the first direction. The stability of the ultrasonic focus in the treatment process in the related art is improved.