Synthesis method of POSS-based reversible thermochromic membrane material
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A technology of thermochromic and synthetic method, applied in the field of synthesis of POSS-based reversible thermochromic film materials, can solve the problem of less color-changing materials, and achieve the effects of fast discoloration speed, simple post-processing method and mild processing conditions
Active Publication Date: 2021-06-18
HARBIN INST OF TECH
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[0004] The invention solves the problem that there are few color-changing materials in the range of 80-200°C, and provides a method for synthesizing POSS-based reversible thermochromic film materials. The color change of the synthesized material can be controlled by temperature. Reversible means color change After that, the original color will be restored
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specific Embodiment approach 1
[0022] Specific embodiment one: what this embodiment records is a kind of synthetic method of POSS-based reversible thermochromic film material, and described method comprises the following steps:
[0023] Step 1, dissolving POSS in water;
[0024] Step 2, chromium salt is added in the POSS aqueous solution;
[0025] Step 3: Stir at 20-40°C for 1-24 hours, volatilize the solvent at 20-80°C, and obtain the POSS-based reversible thermochromic film material after the solvent is completely volatilized.
specific Embodiment approach 2
[0026] Specific embodiment two: the synthetic method of a kind of POSS-based reversible thermochromic film material described in specific embodiment one, in step one, described POSS is polyaminopropyl POSS or polyaminophenyl POSS, the number of functional groups of POSS 2-8 pieces. The amino group coordinates with the metal, and the number of 2-8 can form a cross-linked structure.
specific Embodiment approach 3
[0027] Specific embodiment three: the synthesis method of a POSS base film material with both reversible discoloration and ultraviolet shielding described in specific embodiment one, in step one, the mass ratio of POSS to water is 0.1-1:1 .
[0028] Embodiment 4: A method for synthesizing a POSS base film material with reversible discoloration and UV shielding described in Embodiment 1. In step 2, the mass ratio of the chromium salt to POSS is 1 to 4: 1~5.
[0029] Specific embodiment five: the synthetic method of a kind of POSS base film material that has both reversible discoloration and ultraviolet shielding described in specific embodiment one, in step 2, described chromium salt is chromium nitrate nonahydrate or chlorinated hexahydrate chromium.
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Abstract
The invention discloses a synthesis method of a POSS-based reversible thermochromic membrane material, and belongs to the technical field of synthesis of color-changing materials. The invention solves the problem that color-changing materials at the temperature of 80-200 DEG C are few at present. The method comprises the following steps: dissolving POSS in water; adding a chromium salt into the POSS aqueous solution; 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 reversible thermochromic membrane material after the solvent is completely volatilized. The POSS-based reversible thermochromic membrane material is synthesized for the first time, the color change range is 80-200 DEG C, the color change is obvious, and the application field of POSS is expanded. According to the method, the POSS-based membrane material with various color changes can be synthesized. The method has the advantages of simple post-treatment method, mild treatment conditions, wide color change range of the membrane material, high color change speed and the like. Water is used as a solvent, the POSS-based color-changing membrane material is generated through low-temperature reaction, and the method is green, environmentally friendly and mild in reaction condition.
Description
technical field [0001] The invention belongs to the technical field of synthesis of color-changing materials, and in particular relates to a synthesis method of a POSS-based reversible thermochromic film material. 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 structure of the cage-shaped skeleton of POSS, POSS has excellent dielectric and thermal stability. At this stage, POSS is mostly used as a filler to improve the heat resistance, mechanical properties, dielectric properties and electrical conductivity of polymers. , There are few relevant literature reports on POSS used as reversible thermochromic materials. [0003] At present, there are many types of reversible thermochromic materials in the high temperature zone (color changing temperature of 200-1000°C), most of which are inorganic fillers,...
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