A temperature-controlled irreversible phase-change porous liquid metal material and its preparation and application
A liquid metal and phase change technology, applied in applications, surgery, drug delivery, etc., can solve the problems of high density, difficulty in drug loading and fixed position, etc., and achieve the effects of good conductivity, strong deformability, and broad application prospects
Active Publication Date: 2019-03-22
TSINGHUA UNIV
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Problems solved by technology
In the future, liquid metal is also expected to be implanted in the body as a drug-loaded material, but this material has a high density and strong fluidity, so it is difficult to load the drug and fix the position
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[0023] In order to make the purpose, preparation scheme and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0024] The present invention is a preparation method and application of an irreversible phase-change porous liquid metal material. It is prepared from liquid metal gallium-indium alloy as a raw material. By adding iron powder and hydrochloric acid, using a magnetic field to enrich the iron powder, heating or standing still can achieve Porous and low-density structure, the tempera...
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Abstract
Disclosed is a temperature control irreversible phase change porous liquid metal material. A porous structure exists in liquid metal and contains gases, the liquid state is the ordinary state, and the liquid phase can be changed into the solid phase through temperature decreasing or increasing; high-density high-strength solid metal can be obtained after temperature decreasing; the liquid metal can be changed into loose and porous solid metal through temperature increasing, after temperature increasing, the solid state cannot be changed into the liquid state through temperature decreasing, and the liquid substance can be permanently changed into the solid substance through high-temperature treatment; and the substance has the advantages of being high in porosity, small in density, good in electrical conductivity, heat insulation effect, stability and magnetism and the like and also has the characteristic of metal materials. Through the high temperature, the liquid-solid phase change breaks a traditional phase change principle, and moreover the liquid substance can be permanently solidified through temperature-increasing treatment; and the material combines numerous good properties and has the important application in the fields of electronic industries, in-vivo robots, magnetic control driving, metal repairing and the like.
Description
technical field [0001] The invention belongs to the technical field of porous liquid metal materials, in particular to a temperature-controlled irreversible phase-change porous liquid metal material and its preparation and application. Background technique [0002] Traditional liquid metals at room temperature, such as mercury, have a long history of application, but their toxicity limits their applications. Now gallium metal and its alloys are slowly becoming a star in the field of materials as liquid metals. It not only has good electrical and thermal conductivity, but also has deformability, making liquid metal robots move from science fiction to reality. It was previously reported that liquid metal can move for more than an hour after swallowing a small amount of aluminum. The good deformability of liquid metal is a soft robot. preparation is possible. Liquid metals have good biocompatibility, and reports have shown that gallium indium liquid metals can be used as bioma...
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IPC IPC(8): C22C28/00C22C1/08A61L24/00A61L24/02
CPCA61L24/001A61L24/0036A61L24/02A61L2400/06C22C1/08C22C28/00
Inventor 汪鸿章国瑞刘静
Owner TSINGHUA UNIV