Synthesis method of POS-based membrane material with reversible color change and ultraviolet shielding functions
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A synthesis method and external shielding technology are applied in the synthesis field of POSS base film materials, which can solve the problems of fixed application range of POSS, and achieve the effects of green environmental reaction conditions, simple synthesis and sensitive color change.
Active Publication Date: 2021-06-18
HARBIN INST OF TECH
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Problems solved by technology
[0004] The present invention solves the problem that there are few materials with both thermochromic and ultraviolet shielding properties at the same time, and the POSS application range is fixed, and provides a method for synthesizing POSS base film materials with both reversible discoloration and ultraviolet shielding properties. The color change of the material can be controlled by temperature, reversible means that after the color changes, it will return to the original color
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specific Embodiment approach 1
[0019] Specific embodiment one: what this embodiment records is a kind of synthesizing method of POSS base film material with reversible discoloration and ultraviolet shielding concurrently, described method comprises the following steps:
[0020] Step 1, dissolving POSS in water;
[0021] Step 2, adding copper salt and chromium salt into POSS aqueous solution, stirring at room temperature for 3h;
[0022] Step 3: Stir at 20-40°C for 1-24 hours, and volatilize the solvent at 20-80°C to obtain a POSS base film material with reversible discoloration and UV shielding.
specific Embodiment approach 2
[0023] Specific embodiment two: a kind of synthesizing method of POSS base film material with reversible discoloration and ultraviolet shielding described in specific embodiment one concurrently, in step one, described POSS is polyaminopropyl POSS or polyaminophenyl POSS, the number of functional groups in POSS is 2-8. The amino group coordinates with the metal, and the number of 2-8 can form a cross-linked structure.
specific Embodiment approach 3
[0024] Specific embodiment three: a method for synthesizing a POSS base film material with both reversible discoloration and ultraviolet shielding described in specific embodiment one or two, in step one, the mass ratio of POSS to water is 0.1 to 1 :1.
[0025] Specific embodiment four: the synthetic method of a kind of POSS base film material that has reversible discoloration and ultraviolet shielding described in specific embodiment one concurrently, in step 2, the mass ratio of described copper salt and chromium salt total amount and POSS 1~2:1~4.
[0026] Embodiment 5: A method for synthesizing a POSS base film material with reversible discoloration and UV shielding described in Embodiment 4, in step 2, the mass ratio of the copper salt to the chromium salt is 1:4 .
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Abstract
The invention relates to a synthesis method of a POSS-based membrane material with reversible color change and ultraviolet shielding functions, belonging to the technical field of synthesis of POSS-based materials. The method solves the problems that at present, materials with both thermochromism and ultraviolet shielding performance are few, and the application range of POSS is fixed. The method comprises the steps: dissolving POSS in water; adding a copper salt and a chromium salt into the POSS aqueous solution, and stirring at room temperature for 3 hours; and stirring at 20-40 DEG C for 1-24 hours, and volatilizing the solvent at 20-80 DEG C to obtain the POSS-based membrane material with reversible color change and ultraviolet shielding functions. The POSS-based membrane material with reversible color changing and ultraviolet shielding functions is synthesized for the first time, the POSS-based membrane material is changed from green to luminous yellow at 80 DEG C and is obvious in color changing, the membrane material almost has no ultraviolet transmittance at 200-400 nm, the ultraviolet transmittance is almost 0%, and the POSS-based membrane material can be used as an ultraviolet shielding material. According to the room-temperature synthesis and environment-friendly method disclosed by the invention, POSS is simultaneously applied to the fields of color change and ultraviolet shielding.
Description
technical field [0001] The invention belongs to the technical field of POSS-based material synthesis, and in particular relates to a method for synthesizing a POSS-based film material with reversible discoloration and ultraviolet shielding. Background technique [0002] Polyhedral Oligomeric Silsesquioxane (Polyhedral Oligomeric Silsesquioxane, referred to as POSS) is a class of organic-inorganic nano-compounds with a cage-like skeleton. Due to the symmetrical cage structure of POSS, POSS has excellent dielectric and thermal stability, and is usually used as additives or nanoparticles to improve the dielectric, pollution, and thermal stability of materials such as resins. [0003] At present, there are many types of reversible thermochromic materials in the high-temperature region (discoloration temperature of 200-1000°C), most of which are inorganic fillers, and POSS is rarely used in the fields of thermochromism and ultraviolet shielding. Contents of the invention [00...
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