5results about How to "Small specific heat capacity" patented technology

The invention discloses a decanoic acid-myristyl alcohol phase change material as well as a preparation method and application thereof, and belongs to the technical field of energy storage phase change materials. The preparation method comprises the following steps: firstly, mixing capric acid and myristyl alcohol, carrying out heat treatment to prepare a binary eutectic mixture, then adsorbing the obtained binary eutectic mixture into hollow open steel balls through an impregnation method, cooling, drying, and finally packaging to obtain the hollow open steel balls. The phase-change temperature range of the prepared composite phase-change material is 18.30-20.86 DEG C. Compared with the phase-change temperature of a traditional phase-change material, the phase-change temperature range suitable for organic matters is effectively widened, good thermal characteristics of a single component are kept, the composite phase-change material better conforms to the working environment of an underground energy structure, and the working efficiency is improved. Meanwhile, the graphite powder is doped, so that a plurality of heat conduction channels are formed in the phase-change concrete, and the heat exchange capacity of the phase-change concrete is effectively improved.

The invention relates to the technical field of phosphorus chemical industry production, and particularly discloses a production process and equipment for producing phosphorus pentafluoride, the production process comprises five steps of material preparation, feeding, fluorination reaction, condensation reflux and collection, in the material preparation stage, anhydrous hydrogen fluoride is liquefied, and the liquefaction low temperature of the anhydrous hydrogen fluoride is maintained in the whole reaction; the technical problems that in the prior art, a gas-solid reaction is used in a process for producing phosphorus pentafluoride from anhydrous hydrogen fluoride and phosphorus pentachloride, and a fluorination reaction is a strong exothermic reaction, so that temperature control is strict in the production process, and potential safety hazards exist are solved.

The invention relates to the technical field of health care, in particular to preparation and application of a magnetic silica gel health care material, and the magnetic silica gel health care material sequentially comprises a magnetic conductive layer, a silica gel magnetic material layer and a magnetic shielding coating layer from inside to outside. Wherein the silica gel magnetic material layer is composed of a magnetic material, microporous silica gel, a traditional Chinese medicine extract, iron silicide, graphene and calamine, can generate a magnetic field and has a health-care function; the magnetic conductive layer is composed of a hydrogel-graphene composite material, a magnetic field can be enhanced according to acupuncture points, and the treatment and health care effects are improved; the magnetic shielding coating layer contains magnetic shielding filler and can prevent an external magnetic field from weakening or disappearing the magnetism of the magnetic material. The invention further provides a preparation method of the magnetic silica gel health-care material. The prepared magnetic silica gel health-care material is high in magnetism, good in health-care effect and good in skin-friendly performance of a human body, has permanent magnetism and is not prone to demagnetization. The magnetic silica gel health-care material can be applied to treatment of alopecia, backache, prostate diseases and the like.

This invention provides an absorbent for capturing carbon dioxide and a method for capturing carbon dioxide. By volume percentage, the absorbent comprises 20-60% glycine salt aqueous solution, 10-50% triethylene glycol monomethyl ether, 5-10% ethylene glycol, and the balance being water. This absorbent combines the advantages of glycine salt systems, such as low volatility, non-toxicity, safety, and better antioxidant degradation resistance, while avoiding the risk of solid precipitates forming after absorption by the glycine salt system, which could cause pipeline blockage.

The utility model discloses an embedded ceramic heat storage structure for distributed heat supply, which comprises an outer pipe body, a mounting cavity is arranged inside the outer pipe body, a ceramic inner pipe is arranged inside the mounting cavity, a plurality of honeycomb holes are distributed on the surface of the front end of the ceramic inner pipe, the plurality of honeycomb holes are distributed in a honeycomb shape, and heat conducting rods are arranged inside the honeycomb holes. A circulation channel is formed between the heat conduction rod and the honeycomb hole. Due to the fact that the ceramic inner pipe is arranged and the honeycomb holes are distributed in the ceramic inner pipe in the honeycomb shape, the ceramic inner pipe is fast in heat conduction, slow in heat dissipation and low in specific heat capacity, heat energy can be stored, continuous heat energy heat supply can be achieved, and the honeycomb heat pipe is suitable for a distributed heat supply system.