Flame retardant coating with thermoelectric response fire warning function, preparation method and application
A fire early warning and flame retardant coating technology, applied in fire alarms, coatings, fire retardant coatings, etc., can solve the problems of easy failure, poor early warning ability and low sensitivity of GO-based early warning coatings, and meet the requirements of low production equipment , easy to control, wide applicability effect
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Embodiment 1
[0035] 1) Preparation of pyroelectric sensing layer: uniformly disperse 0.8g silver telluride, 0.4g silver nanowires and 0.8g phenolic resin in 98.0g ethanol, stir them ultrasonically for 40min to fully disperse them, prepare coating A, and then Coating A was sprayed on polypropylene and sylvestris pine substrates respectively, and the coating amount was 0.05mL / cm 2 , and then placed in an oven to dry at 50° C. for 15 minutes; the process of spraying and drying was repeated four times to obtain a thermoelectric sensing layer with a thickness of about 10 μm.
[0036]2) Preparation of flame retardant layer: 1.0g of montmorillonite, 1.0g of carboxymethyl cellulose and 0.03g of ethylene glycol diglycidyl ether were uniformly dispersed in 98.0g of deionized water, and ultrasonically stirred for 180min to fully disperse them. Prepare coating B, then spray coating B on the pyroelectric sensing layer prepared in step 1), the coating amount is 0.10mL / cm 2 , and then placed in an oven ...
Embodiment 2
[0039] The difference between this example and Example 1 is that: 0.8g silver telluride in step 1) is replaced by 1.0g silver selenide, the amount of silver nanowires is reduced to 0.2g, and the phenolic resin is replaced by hydroxypropyl cellulose , 98.0g ethanol was replaced by 148.0g deionized water, the ultrasonic stirring time was extended to 60min, and the coating volume was reduced to 0.03mL / cm 2 , the drying temperature was reduced to 40°C, the drying time was extended to 30min, and the repeat process was increased to 8 times. The vertical combustion and fire early warning test results are shown in Table 1 and Table 2, and the relevant test methods are the same as in Example 1.
Embodiment 3
[0041] The difference between this example and Example 1 is that the silver telluride in step 1) is replaced by poly-3,4-ethylenedioxythiophene, the amount of silver nanowires is increased to 0.6g, and 0.8g of phenolic resin is replaced by 0.6 g ethylcellulose, ethanol was replaced by isopropanol, the ultrasonic stirring time was extended to 80min, and the coating volume was increased to 0.10mL / cm 2 , the drying temperature was increased to 60°C, the drying time was extended to 25min, and the repeated process was reduced to 3 times. The vertical combustion and fire early warning test results are shown in Table 1 and Table 2, and the relevant test methods are the same as in Example 1.
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