Preparation method of high-strength paper-based friction composite material
A paper-based friction and composite material technology, applied in the field of friction materials, can solve problems such as low paper strength, and achieve the effects of preventing flocculation and agglomeration, improving dispersibility, and strengthening steric hindrance
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Embodiment 1
[0044] In terms of parts by weight, weigh 20 parts of tetraethyl orthosilicate, 10 parts of ammonia water with a mass fraction of 25%, 20 parts of high-activity dry yeast, 160 parts of absolute ethanol, and 160 parts of deionized water. 1. Add absolute ethanol to deionized water, stir at 200r / min for 40min at normal temperature to obtain yeast liquid, add tetraethyl orthosilicate to the yeast liquid, stir at 240r / min for 20min at normal temperature to obtain silicon-containing yeast liquid, and Ammonia water was slowly added to the silicon-containing yeast liquid at a dropping rate of 20 mL / min, and stirred at a speed of 300 r / min at room temperature for 20 h to obtain a mixed liquid, which was filtered, and the filter residue was taken, washed three times with deionized water, and placed in a In a Furnace, calcined at 600°C for 1 hour to obtain hollow silica powder; then weigh 30 parts of hollow silica powder, 30 parts of formaldehyde, 60 parts of resorcinol, and 6 parts by we...
Embodiment 2
[0046]In terms of parts by weight, weigh 25 parts of tetraethyl orthosilicate, 12 parts of ammonia water with a mass fraction of 25%, 25 parts of high-activity dry yeast, 200 parts of absolute ethanol, and 200 parts of deionized water. 1. Add absolute ethanol to deionized water, stir at a speed of 220r / min for 50min at normal temperature to obtain a yeast liquid, add ethyl orthosilicate to the yeast liquid, and stir at a speed of 260r / min for 25min at normal temperature to obtain a yeast liquid containing silicon. Ammonia water was slowly added to the silicon-containing yeast liquid at a dropping rate of 25 mL / min, and stirred at a speed of 325 r / min at room temperature for 22 hours to obtain a mixed liquid, which was filtered, and the filter residue was taken, washed 4 times with deionized water, and placed in a In a Furnace, calcined at 700°C for 1 hour to obtain hollow silica powder; then weighed 35 parts of hollow silica powder, 35 parts of formaldehyde, 70 parts of resorci...
Embodiment 3
[0048] In terms of parts by weight, weigh 30 parts of ethyl orthosilicate, 15 parts of ammonia water with a mass fraction of 25%, 30 parts of high-activity dry yeast, 240 parts of absolute ethanol, and 240 parts of deionized water. 1. Add absolute ethanol to deionized water, stir at 240r / min for 60min at normal temperature to obtain yeast liquid, add tetraethyl orthosilicate to the yeast liquid, stir at 280r / min for 30min at normal temperature to obtain silicon-containing yeast liquid, and Ammonia water was slowly added to the silicon-containing yeast liquid at a dropping rate of 30mL / min, and stirred at a speed of 350r / min at room temperature for 24 hours to obtain a mixed solution, which was filtered, and the filter residue was taken, washed 5 times with deionized water, and placed in a In a Furnace, calcined at 800°C for 2 hours to obtain hollow silica powder; then weigh 40 parts of hollow silica powder, 40 parts of formaldehyde, 80 parts of resorcinol, and 8 parts by weight...
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