Preparation method of phase change energy storage wood with controllable heat storage and release capacity

Abstract

The invention discloses a preparation method of phase change energy storage wood with controllable heat storage and release capacity. The method mainly comprises the following steps: (1) preparing a cationic azobenzene surfactant, and grafting acid to treat carbon black to obtain azobenzene / carbon black heat conduction enhanced nanoparticles, (2) taking acrylic acid as a monomer, adding an initiator and a cross-linking agent, blending with a polyethylene glycol solution, and adding azobenzene / carbon black heat conduction enhanced nanoparticles to obtain a heat conduction enhanced polyacrylic acid / polyethylene glycol impregnation liquid, and (3) pressurizing the pretreated poplar test block in vacuum, sucking in the heat conduction enhanced polyacrylic acid / polyethylene glycol impregnationliquid, curing and drying to obtain the phase change energy storage wood with controllable heat storage and release capacity. The preparation method is simple and low in cost, and the prepared phase change energy storage wood has good heat conduction performance and controllable heat storage and release performance.

Description

technical field

[0001] The invention relates to the technical field of energy storage, in particular to a preparation method of phase-change energy storage wood with controllable heat storage and release capabilities. Background technique

[0002] Shape-fixed phase-change energy storage materials are a new method of phase-change material energy storage developed in recent years, using adsorption (intermolecular force or hydrogen bond) or encapsulation to fix solid-liquid phase-change materials in a certain on the carrier. Shaped phase change energy storage materials generally consist of working media and carrier materials. The working medium is usually various solid-liquid phase change materials, whose function is to store or release energy and regulate temperature during the solid-liquid phase change process. The support material is used to maintain the non-flowability and processability of the shape-set phase change material. Shaped phase change materials have better pr...

Examples

Embodiment 1

[0040] A method for preparing phase-change energy storage wood with controllable heat storage and release capacity, comprising the following process steps:

[0041] (1) Add 50mL of ethanol, 20mol of potassium carbonate and 40mol of 1,4-dibromobutane into a 250mL three-necked flask, and raise the temperature to 85°C. Slowly drop 15 mol of 4-hydroxyazobenzene in ethanol solution into a three-neck flask for 5 hours of reaction. The solvent ethanol was removed by rotary evaporation, the crude product was dissolved in 800mL of dichloromethane, the dichloromethane was removed by rotary evaporation, the remaining product was recrystallized twice with ethanol, and the AzoC was separated and purified by column chromatography 4 OBr (petroleum ether / ethyl acetate=7 / 1), vacuum-dry at room temperature for 5 h; mix 70 mL of 33% trimethylamine ethanol solution and 100 mL of acetonitrile solution, add 25 mmol AzoC 4 OBr, stirred at 60°C for 8h. After cooling to room temperature, the solvent...

Embodiment 2

[0048] A method for preparing phase-change energy storage wood with controllable heat storage and release capacity, comprising the following process steps:

[0049] (1) Add 50mL of ethanol, 30mol of potassium carbonate and 30mol of 1,4-dibromobutane into a 250mL three-necked flask, and raise the temperature to 85°C. Slowly drip 25mol of 4-hydroxyazobenzene ethanol solution into a three-necked flask to react for 5h. The solvent ethanol was removed by rotary evaporation, the crude product was dissolved in 800mL of dichloromethane, the dichloromethane was removed by rotary evaporation, the remaining product was recrystallized twice with ethanol, and the AzoC was separated and purified by column chromatography 4 OBr (petroleum ether / ethyl acetate=7 / 1), vacuum-dry at room temperature for 5 h; mix 65 mL of 33% trimethylamine ethanol solution and 110 mL of acetonitrile solution, add 30 mmol AzoC 4 OBr, stirred at 60 °C for 10 h. After cooling to room temperature, the solvent ethano...

Embodiment 3

[0056] A method for preparing phase-change energy storage wood with controllable heat storage and release capacity, comprising the following process steps:

[0057] (1) Add 50mL of ethanol, 25mol of potassium carbonate and 35mol of 1,4-dibromobutane into a 250mL three-necked flask, and raise the temperature to 85°C. Slowly drop 20mol of 4-hydroxyazobenzene ethanol solution into a three-necked flask for 5 hours. The solvent ethanol was removed by rotary evaporation, the crude product was dissolved in 800mL of dichloromethane, the dichloromethane was removed by rotary evaporation, the remaining product was recrystallized twice with ethanol, and the AzoC was separated and purified by column chromatography 4 OBr (petroleum ether / ethyl acetate=7 / 1), vacuum-dry at room temperature for 5 h; mix 65 mL of 33% trimethylamine ethanol solution and 110 mL of acetonitrile solution, add 25 mmol AzoC 4 OBr, stirred at 60 °C for 10 h. After cooling to room temperature, the solvent ethanol an...

technical field

[0001] The invention relates to the technical field of energy storage, in particular to a preparation method of phase-change energy storage wood with controllable heat storage and release capabilities. Background technique

[0002] Shape-fixed phase-change energy storage materials are a new method of phase-change material energy storage developed in recent years, using adsorption (intermolecular force or hydrogen bond) or encapsulation to fix solid-liquid phase-change materials in a certain on the carrier. Shaped phase change energy storage materials generally consist of working media and carrier materials. The working medium is usually various solid-liquid phase change materials, whose function is to store or release energy and regulate temperature during the solid-liquid phase change process. The support material is used to maintain the non-flowability and processability of the shape-set phase change material. Shaped phase change materials have better pr...

Examples

Embodiment 1

[0040] A method for preparing phase-change energy storage wood with controllable heat storage and release capacity, comprising the following process steps:

[0041] (1) Add 50mL of ethanol, 20mol of potassium carbonate and 40mol of 1,4-dibromobutane into a 250mL three-necked flask, and raise the temperature to 85°C. Slowly drop 15 mol of 4-hydroxyazobenzene in ethanol solution into a three-neck flask for 5 hours of reaction. The solvent ethanol was removed by rotary evaporation, the crude product was dissolved in 800mL of dichloromethane, the dichloromethane was removed by rotary evaporation, the remaining product was recrystallized twice with ethanol, and the AzoC was separated and purified by column chromatography 4 OBr (petroleum ether / ethyl acetate=7 / 1), vacuum-dry at room temperature for 5 h; mix 70 mL of 33% trimethylamine ethanol solution and 100 mL of acetonitrile solution, add 25 mmol AzoC 4 OBr, stirred at 60°C for 8h. After cooling to room temperature, the solvent...

Embodiment 2

[0048] A method for preparing phase-change energy storage wood with controllable heat storage and release capacity, comprising the following process steps:

[0049] (1) Add 50mL of ethanol, 30mol of potassium carbonate and 30mol of 1,4-dibromobutane into a 250mL three-necked flask, and raise the temperature to 85°C. Slowly drip 25mol of 4-hydroxyazobenzene ethanol solution into a three-necked flask to react for 5h. The solvent ethanol was removed by rotary evaporation, the crude product was dissolved in 800mL of dichloromethane, the dichloromethane was removed by rotary evaporation, the remaining product was recrystallized twice with ethanol, and the AzoC was separated and purified by column chromatography 4 OBr (petroleum ether / ethyl acetate=7 / 1), vacuum-dry at room temperature for 5 h; mix 65 mL of 33% trimethylamine ethanol solution and 110 mL of acetonitrile solution, add 30 mmol AzoC 4 OBr, stirred at 60 °C for 10 h. After cooling to room temperature, the solvent ethano...

Embodiment 3

[0056] A method for preparing phase-change energy storage wood with controllable heat storage and release capacity, comprising the following process steps:

[0057] (1) Add 50mL of ethanol, 25mol of potassium carbonate and 35mol of 1,4-dibromobutane into a 250mL three-necked flask, and raise the temperature to 85°C. Slowly drop 20mol of 4-hydroxyazobenzene ethanol solution into a three-necked flask for 5 hours. The solvent ethanol was removed by rotary evaporation, the crude product was dissolved in 800mL of dichloromethane, the dichloromethane was removed by rotary evaporation, the remaining product was recrystallized twice with ethanol, and the AzoC was separated and purified by column chromatography 4 OBr (petroleum ether / ethyl acetate=7 / 1), vacuum-dry at room temperature for 5 h; mix 65 mL of 33% trimethylamine ethanol solution and 110 mL of acetonitrile solution, add 25 mmol AzoC 4 OBr, stirred at 60 °C for 10 h. After cooling to room temperature, the solvent ethanol an...