Thermochromic greenhouse film and preparation method thereof

Abstract

The invention discloses a thermochromic greenhouse film. The thermochromic greenhouse film comprises a polyolefin film body and thermochromic coating on the surface of the polyolefin film body, wherein the thermochromic coating is obtained by spraying with a thermochromic solution; the thermochromic solution is obtained by mixing the following raw materials in parts by weight: 5 parts of an acrylic emulsion, 60 parts of ethanol with the concentration of 95%, 5-10 parts of a thermochromic material and 2-5 parts of an additive; the raw materials are supplemented to 100 parts by water; the additive is one or more of a coupling compounding agent, an antioxidant, a photografting aid and an antistatic agent; the thermochromic material is one or more of nanoscale titanium sol with the concentration of 5-20wt%, silica sol with the concentration of 5-20wt% and zinc sol with the concentration of 5-20wt%. The thermochromic greenhouse film is prepared by uniformly spraying the surface of the polyolefin film with the thermochromic solution and drying. The thermochromic greenhouse film effectively filters out light through change of the color so as to adjust the temperature therein.

Description

Technical field:

[0001] The invention belongs to the technical field of material preparation, and in particular relates to a greenhouse film capable of adjusting indoor temperature and a preparation method thereof. By coating the surface of an ordinary greenhouse film with a thermochromic solution, the color of the greenhouse film will deepen when the temperature is too high to block strong light. Enter the greenhouse to achieve the purpose of cooling. Background technique:

[0002] Polyolefin film is used to make plastic greenhouses and greenhouses to provide crops with a microclimate environment with good temperature, humidity and light quality, thereby improving the yield and quality of crops, such as providing the best growth temperature for vegetables - 15-30°C. However, the general greenhouse film is only suitable for heat preservation in the north, and has no cooling effect. Excessively high temperature will also affect the yield and quality of crops. Invention cont...