Preparation method of rubber sealing material containing nano-magnetic powder modified montmorillonite

[0020] A method for preparing a rubber sealing material containing nano-magnetic powder modified montmorillonite, characterized in that it comprises the following steps:

[0021] (1) Put 5 parts by weight of ferric oxide powder in acetone 5 times its volume, and heat to boiling, boil and stir at 400rpm for 10min, then cool down to 80°C, and add 1 part of lignin , continue stirring for 10 minutes, filter, and dry at 50°C;

[0022] (2) Using polyacrylic acid to modify the iron ferric oxide powder obtained in step (1) to obtain the modified ferric iron tetroxide powder;

[0023] (3) Add 10 parts of montmorillonite into deionized water 10 times its volume, and use 2KHz ultrasonic treatment at 40°C for 20 minutes, then add the modified ferric oxide powder obtained in step (2), continue ultrasonication for 10 minutes, and turn to Put it into the reactor, under stirring at 200rpm, adjust the pressure of the reactor to 0.5MPa, the temperature to 130°C, react for 4h, then lower the tempe

[0032] A method for preparing a rubber sealing material containing nano-magnetic powder modified montmorillonite, characterized in that it comprises the following steps:

[0033] (1) Place 8 parts by weight of ferric oxide powder in acetone that is 7 times its volume, and heat to boiling, boil and stir at 420rpm for 12min, then cool down to 82°C, and add 2 parts of lignin , continue stirring for 15 minutes, filter, and dry at 53°C;

[0034] (2) Using polyacrylic acid to modify the iron ferric oxide powder obtained in step (1) to obtain the modified ferric iron tetroxide powder;

[0035] (3) Add 12 parts of montmorillonite to deionized water 20 times its volume, and use 3KHz ultrasonic treatment at 41°C for 25 minutes, then add the modified ferric oxide powder obtained in step (2), continue ultrasonication for 15 minutes, and turn to Put it into the reactor, under stirring at 250rpm, adjust the pressure of the reactor to 1.0MPa, the temperature to 135°C, react for 5h, then lower

[0044]A method for preparing a rubber sealing material containing nano-magnetic powder modified montmorillonite, characterized in that it comprises the following steps:

[0045] (1) Put 10 parts by weight of ferric oxide powder in acetone 10 times its volume, heat to boiling, boil and stir at 430rpm for 15min, then cool down to 84°C, and add 2 parts of lignin , continue stirring for 20 minutes, filter, and dry at 55°C;

[0046] (2) Using polyacrylic acid to modify the iron ferric oxide powder obtained in step (1) to obtain the modified ferric iron tetroxide powder;

[0047] (3) Add 15 parts of montmorillonite to 30 times its volume in deionized water, and use 4KHz ultrasonic treatment at 43°C for 30 minutes, then add the modified ferric oxide powder obtained in step (2), continue ultrasonication for 20 minutes, and then transfer to Put it into the reactor, under stirring at 300rpm, adjust the pressure of the reactor to 1.5MPa, the temperature to 140°C, react for 5h, then lower t