Method for producing a cold resisting and heat insulating composite glue composed of a hydrophobic aerogel and the related product thereof

A method for producing a composite glue composed of a hydrophobic aerogel, comprising:

• a mixing step:
• mixing an alkoxysilane compound, an alkyl-substituted alkoxysilane compound, an R-silicone oligo molecule or any mixture thereof with a mixing solvent to form a mixing solution;
• wherein the alkyl-substituted alkoxysilane compound is methyltrimethoxysilane (MTMS) or methyltriethoxysilane (MTES);
• wherein the R— is a functional group linked to a silicone molecular chain rear end, the R— comprises:
• —COOH, —NH2, —NH—, —NH—NH2, —OH, —N═C═O or —N—CO—N—, and a carbon number of the R— is from C1 to C6;
• a hydrolysis step:
• adding an acid catalyst into the mixing solution to perform a hydrolysis reaction;
• a condensation step:
• adding a basic catalyst into the mixing solution to perform a condensation reaction;
• wherein in the condensation reaction, a dispersing solvent is added into the mixing solution at a volume ratio of the mixing solution and the dispersing solvent between 1:0.5 and 1:4, and the mixing solution is mixed at a high speed to allow the mixing solution to form an aerogel wet gel of a uniform structure and having a particle size ranging from several hundreds of nanometers to several hundreds of micrometers;
• or wherein in the condensation reaction, a dispersing solvent is added into the mixing solution at a volume ratio of the mixing solution and the dispersing solvent between 1:0.5 and 1:4 to allow the mixing solution to form an aerogel wet gel of a uniform structure, followed by crushing the aerogel wet gel in order to crush the aerogel wet gel into particles of a particle size ranging from several hundreds of micrometers to several tenths of millimeters and being dispersed into the dispersing solvent;
• an aging step:
• performing aging on the aerogel wet gel under a specific temperature in order to stabilize the aerogel wet gel;
• a high-temperature pulse washing step:
• using a pulse acting force of a high temperature water under a normal pressure to replace an organic component or solvent in the aerogel wet gel until the aerogel wet gel indicates a milky color;
• a drying step:
• using high-temperature distillation to remove or using a filter to remove the solvent, followed by performing high-temperature drying on the aerogel wet gel in order to obtain hydrophobic aerogel dried gel particles having a high porosity and a high specific surface area;
• and
• a composition step:
• using a mixing machine under a mixing force to mix the hydrophobic aerogel dried gel particles directly with an inorganic fiber to form a uniformly dispersed inorganic mixture, followed by adding an inorganic binder into the inorganic mixture in order to allow the aerogel particles, the inorganic fiber and the inorganic binder to interact with each other to form a viscous aerogel composite glue, followed by adding a water, a thickener, a dispersant, or an aerogel powder to adjust the viscosity of the aerogel composite glue;
• wherein the inorganic binder comprises one or a plurality of compounds selected from the group consisting of the following:
• phosphate, silicate, sulfate, borate and metal oxide;
• the phosphate refers to zirconium phosphate, phosphoric acid-copper oxide;
• the silicate refers to aluminum silicate or sodium silicate;
• the metal oxide refers to an oxide containing a copper, aluminum, zirconium, yttrium or lanthanum element.