A kind of preparation method of porous carbon microwave absorber using yeast as pore-forming agent
A technology of microwave absorber and pore-forming agent, which is applied in the direction of carbon preparation/purification, sustainable manufacturing/processing, and climate sustainability. It can solve the problems of demanding carbon source materials and complex processes, and achieve environmental protection and friendliness. , simple process and rich pore structure
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Embodiment 1
[0028] In this embodiment, the preparation method of the porous carbon microwave absorber comprises the following steps:
[0029] Step 1: Activation of dry yeast powder: Measure 50ml of deionized water in a beaker, put it in a 30°C water bath and heat it for later use; weigh 0.3g of dry yeast powder, pour it into the above deionized water, and stir with a glass rod Until the dry yeast powder is completely dispersed in the water; keep it in a water bath at 30°C for 0.5h to fully stimulate the activity of the yeast;
[0030] Step 2: Preparation of carbonized raw materials: Weigh 100 g of flour into a large beaker, pour the above-mentioned 50 ml of the yeast-dispersed aqueous solution into the flour and stir evenly. After kneading the wet flour containing yeast into dough, put it in a beaker, seal it with plastic wrap, and ferment it at a constant temperature of 40°C in a drying oven for 1 hour; cut the fermented dough into small pieces and dry it in a drying oven at 120°C Dry f...
Embodiment 2
[0034] In this embodiment, the preparation method of the porous carbon microwave absorber comprises the following steps:
[0035] Step 1: Activation of dry yeast powder: Measure 50ml of deionized water in a beaker, put it in a 40°C water bath and heat it for later use; weigh 0.5g of dry yeast powder, pour it into the above deionized water, and stir with a glass rod Until the dry yeast powder is completely dispersed in the water; keep it in a water bath at 40°C for 0.5h to fully stimulate the activity of the yeast;
[0036] Step 2: Preparation of carbonized raw materials: Weigh 100 g of flour into a large beaker, pour the above-mentioned 50 ml of the yeast-dispersed aqueous solution into the flour and stir evenly. After kneading the wet flour containing yeast into dough, put it in a beaker, seal it with plastic wrap, and ferment it at a constant temperature of 40°C in a drying oven for 1 hour; cut the fermented dough into small pieces and dry it in a drying oven at 100°C Dry f...
Embodiment 3
[0040] In this embodiment, the preparation method of the porous carbon microwave absorber comprises the following steps:
[0041] Step 1: Activation of dry yeast powder: Measure 60ml of deionized water in a beaker, put it in a 35°C water bath and heat it for later use; weigh 0.3g of dry yeast powder, pour it into the above deionized water, and stir with a glass rod Until the dry yeast powder is completely dispersed in the water; keep it in a water bath at 35°C for 1h to fully stimulate the activity of the yeast;
[0042]Step 2: Preparation of carbonized raw materials: Weigh 120 g of flour into a large beaker, pour the above-mentioned 60 ml of the yeast-dispersed aqueous solution into the flour and stir evenly. After kneading the wet flour containing yeast into dough, put it in a beaker, seal it with plastic wrap, and ferment it in a drying oven at a constant temperature of 35°C for 1 hour; cut the fermented dough into small pieces and dry it in a drying oven at 110°C Dry for ...
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Abstract
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