Modified sodium silicate binder

[0020] Example 1

[0021] The fungus was washed 5 times with deionized water, dried in a vacuum freeze-drying box for 30 min to obtain dry fungi, and then the dried fungi were placed in a freeze pulverizer for freezing and pulverizing for 25 min to obtain cell powder, which was added with water. In the beaker, move the beaker into a digital display speed measuring constant temperature magnetic stirrer, under the condition of temperature of 40 ° C and rotation speed of 500 r/min, constant temperature stirring and mixing for 20 minutes, to obtain a mixed solution, and then filter the mixed solution to obtain a filtrate, and set the filtrate to In a pear-shaped flask, fix the pear-shaped flask on a rotary evaporator, adjust the pressure of the rotary evaporator to 800Pa, the temperature to 38°C, and concentrate under reduced pressure for 40min to obtain a concentrated solution, which is vacuum freeze-dried for 2h to obtain a fungal extraction. Then, in parts by weight, take 40 parts of fungal extract, 100 parts of water, 10 parts of agar, 40 parts of silicone-acrylic emulsion and 180 parts of water glass in turn, first add agar and water to a beaker, at a temperature of 98 ℃, Under the condition of rotating speed of 500r/min, heating, stirring and dissolving for 10min to obtain agar solution, then placing the agar solution in an ice-water bath at 4°C, stirring and cooling for 30min at a rotating speed of 600r/min to obtain cooling agar solution; and using the obtained cooling agar solution The liquid was transferred to the mixer, then the silicone-acrylic emulsion and water glass were added to the mixer, and the speed was 1600r/min, and the high-speed stirring was performed for 50min. Add diatomite with 0.04 times the mass of the fungal extract into the mixer, then transfer the material of the mixer into an ultrasonic disperser, and ultrasonically disperse it for 45 minutes under the condition of an ultrasonic frequency of 50 kHz to obtain a dispersion liquid, and then disperse the liquid. Put it in a pear-shaped flask, fix the pear-shaped flask on a rotary evaporator, adjust the pressure of the rotary evaporator to 800Pa, the temperature to be 40°C, and the rotation speed to be 500r/min. Concentrate under reduced pressure for 4 hours to obtain a modified Water glass binder. The fungus is fungus. The silicone-acrylic emulsion model is silicone-acrylic emulsion LR-7220. The solid content of the silicone-acrylic emulsion is 48%. The modulus of the water glass is 3.5. Diatomaceous earth with 0.04 times the mass of the fungal extract can also be added to the modified water glass binder.

[0022] Example 2

[0023] In parts by weight, take 100 parts of water, 10 parts of agar, 40 parts of silicone-acrylic emulsion and 180 parts of water glass in turn, add agar and water to a beaker, heat at 98°C and 500r/min. Stir and dissolve for 10 minutes to obtain agar liquid, then place the agar liquid in an ice-water bath at 4°C, stir and cool at a rotational speed of 600 r/min for 30 minutes to obtain a cooling agar liquid; transfer the obtained cooling agar liquid to a mixer, and then add it to the mixer. Add silicone-acrylic emulsion and water glass to the mixer, stir at a high speed for 50min under the condition of a rotating speed of 1600r/min, and then transfer the material of the mixer into an ultrasonic disperser, and under the condition of an ultrasonic frequency of 50kHz, ultrasonically disperse for 45min. Obtain the dispersion, then place the dispersion in a pear-shaped flask, fix the pear-shaped flask on a rotary evaporator, adjust the pressure of the rotary evaporator to 800Pa, the temperature to be 40°C, and the rotation speed to be 500r/min. Concentrate under reduced pressure. 4h, a modified water glass binder is obtained. The silicone-acrylic emulsion model is silicone-acrylic emulsion LR-7220. The solid content of the silicone-acrylic emulsion is 48%. The modulus of the water glass is 3.5.

[0024] Example 3

[0025] The fungus was washed 5 times with deionized water, dried in a vacuum freeze-drying box for 30 min to obtain dry fungi, and then the dried fungi were placed in a freeze pulverizer for freezing and pulverizing for 25 min to obtain cell powder, which was added with water. In the beaker, move the beaker into a digital display speed measuring constant temperature magnetic stirrer, under the condition of temperature of 40 ° C and rotation speed of 500 r/min, constant temperature stirring and mixing for 20 minutes, to obtain a mixed solution, and then filter the mixed solution to obtain a filtrate, and set the filtrate to In a pear-shaped flask, fix the pear-shaped flask on a rotary evaporator, adjust the pressure of the rotary evaporator to 800Pa, the temperature to 38°C, and concentrate under reduced pressure for 40min to obtain a concentrated solution, which is vacuum freeze-dried for 2h to obtain a fungal extraction. Then, in parts by weight, take 40 parts of fungal extract, 100 parts of water, 40 parts of silicone-acrylic emulsion and 180 parts of water glass in turn, first add water to the mixer, and then add silicone-acrylic emulsion to the mixer and water glass, under the condition of rotating speed of 1600r/min, stir at high speed for 50min, then add fungal extract to the mixer and continue to stir and mix for 45min, then add diatomite with 0.04 times the mass of fungal extract to the mixer, Then transfer the material of the mixer into an ultrasonic disperser, and under the condition of an ultrasonic frequency of 50kHz, ultrasonically disperse for 45min to obtain a dispersion liquid, and then place the dispersion liquid in a pear-shaped flask, and fix the pear-shaped flask on a rotary evaporator. Adjust the pressure of the rotary evaporator to 800Pa, the temperature to 40°C, and the rotation speed to be 500r/min, and concentrate under reduced pressure for 4h to obtain a modified water glass binder. The fungus is fungus. The silicone-acrylic emulsion model is silicone-acrylic emulsion LR-7220. The solid content of the silicone-acrylic emulsion is 48%. The modulus of the water glass is 3.5. Diatomaceous earth with 0.04 times the mass of the fungal extract can also be added to the modified water glass binder.