Heat storage and heat insulation material based on solar photothermal conversion and its preparation method

Abstract

Heat storage and heat insulation material based on solar photothermal conversion consists of a carrier, and an additive attached on the carrier and existing in a form of particles. The carrier is an organic polymer including artificial and natural polymers. The additive is composed of one or more of a metal, a semiconductor and an insulating medium. The preparation method comprises preparing a carrier and an additive, forming a polyester melt from the carrier and the additive via a polyester device, extruding the melt under the action of a screw by using a spinneret with a special spinneret orifice, and drawing to form fiber with a special cross section shape; further performing post finishing on the fiber, oiling, drawing, setting, and coiling and forming to make silk threads achieve good luster, color and tactility; and fabricating the silk threads into required textiles. The material provided by the invention can effectively insulate heat, store heat, keep warmth and prevent cold.

Description

technical field [0001] The invention belongs to the technical field of solar heat utilization, and in particular relates to a heat storage heat preservation material based on solar photothermal conversion and a preparation method thereof. Background technique [0002] The research on solar energy utilization for cold protection and warmth is mostly focused on the light-electricity-heat mode, that is, photoelectric conversion and subsequent electric heat conversion, and the final light-to-heat conversion efficiency is only about 10%. The direct photothermal conversion of solar energy has a theoretical efficiency of up to 90%, but it is often ignored in the application of cold protection and warmth. Japan's Tokuyama and Unijika have jointly developed Solar-α, a thermal storage and thermal insulation material containing zirconium carbide (ZrC) that can absorb solar energy. It is a skin-core composite fiber, the core layer is polyamide or polyester containing zirconium carbide,...

AI Technical Summary

Problems solved by technology

Second, the fiber color is single

The color of Solar-α is gray. Although white fibers with different composite ceramics were developed later, the color of the fibers cannot be easily controlled.

Third, the transparency of the fiber is poor or completely opaque

However, no heat storage and heat preservation materials based on the selective absorption mechanism of solar energy have been found in my country at present.

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