Method of preparing aerogels/nonwoven composites fireproof and heat-insulating materials

A method of preparing aerogels/nonwoven composites fireproof and heat-insulating materials with a hydrophobic or hydrophilic surfaces, comprising steps as follows:

• a mixture step:
• wherein a mixture solution in which alkoxysilane, silicones and silane coupling agents are mixed is stirred, and the molar ratio of alkoxysilane to silicones to silane coupling agents is kept at between 1.0:0.0001:0.0001 and 1.0:0.65:1.0;
• a hydrolysis step:
• wherein hydrous acidic catalysts are instilled into the mixture solution in the mixture step, for inducing a hydrolysis reaction during which a silane coupling agent solution is added and continuously stirred for production of a “silicones-silica aerogels-silane coupling agents” aerogel mixture solution, and the acidic catalyst is selected from either sulfuric acid, phosphoric acid, nitric acid or hydrochloric acid or a combination thereof;
• a condensation step:
• wherein an alkali catalytic hydrous organic solution prepared with alkali catalysts and a hydrous organic solution is gradually added into the hydrolytic mixture solution for a condensation reaction through which a gelatinized “silicones-silica aerogels-silane coupling agents” aerogel solution is produced, and the alkali catalyst is selected from either NaOH, NaHCO3, Na2CO3 or NH4OH or a combination thereof;
• and
• a gelation step:
• wherein a recycled nonwoven composites felt or an ordinary nonwoven composites felt is impregnated with a non-gelatinized “silicones-silica aerogels-silane coupling agents” aerogel solution such that the “silicones-silica aerogels-silane coupling agents” aerogel solution and the non-woven fabrics are completely combined with each other and further dried for development of aerogels/nonwoven composites fireproof and heat-insulating materials.