Preparation method of high-electromagnetic-shielding-effectiveness full-biomass-based carbon aerogel
An electromagnetic shielding and biomass technology, applied in the field of all biomass-based carbon airgel preparation, can solve the problems of poor mechanical stability, toxic process, and complexity of carbon airgel, achieve excellent electromagnetic shielding performance, and the process is easy to master , the effect of good conductivity
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[0034] Embodiment 1~36 (see table 1)
[0035] The preparation method of a kind of high electromagnetic shielding efficiency whole biomass-based carbon aerogel of the present invention, used raw material, reagent are as follows:
[0036] Raw material: cellulose;
[0037] Reagents: lithium hydroxide, urea, tert-butanol, water;
[0038]The preparation method adopts the following steps:
[0039] (1) Raw material drying: fully dry the cellulose.
[0040] (2) Preparation of cellulose solution: at room temperature, the dried cellulose in step (1) is added to the mixed solvent of lithium hydroxide, urea and water, and stirred until a stable and transparent cellulose solution is obtained; step
[0041] In (2), for example, the mass ratio of lithium hydroxide: urea: water can be 8:15:77; the temperature of the mixed solvent is better at low temperature, for example, the temperature can be selected at -20.0°C, -10.0°C or 0°C, etc., see Table 1; Stirring can be vigorously stirred at a...
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