A kind of preparation method of modified white carbon black/solution polymerized rubber composite material
A technology for solution polymerization of rubber and composite materials, which is applied in the field of preparation of modified silica and rubber composite materials, can solve the problems of less reaction steps, poor bonding force between silica and rubber, and easy agglomeration of silica, achieving Effect of improving mechanical strength and improving dispersibility
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Embodiment 1
[0041] (1) Modification of silica:
[0042] The silica was dried under vacuum at 100°C. Add the dry white carbon black dopamine to the tris buffer solution (concentration 8mmol / L) with a pH of 8.5, react at room temperature for 2.5 hours, filter, wash and dry, and the obtained polydopamine-modified nano white Carbon black, named modified silica-1. The mass ratio of white carbon black to dopamine is 1:0.1, and the mass ratio of white carbon black to buffer solution is 1:200.
[0043] (2) Preparation of co-coagulation rubber
[0044] Fully disperse the modified silica-1 prepared in step (1) in cyclohexane, add it to the solution polystyrene-butadiene rubber-1 glue with a solid content of 0.05g / mL, and stir at 30°C After 15 hours, the solvent was removed to obtain a coagulated rubber composed of modified silica-1 / solution polystyrene-butadiene rubber-1, which was named A-1. Wherein the polydopamine modified silica accounts for 3wt% of the solution-polymerized styrene-butadien...
Embodiment 2
[0054] (1) Modification of silica:
[0055] The white carbon black was dried under vacuum at 110°C. Add the dry white carbon black dopamine to the prepared tris buffer solution (concentration 6mmol / L) with pH 9, react at room temperature for 3 hours, filter, wash and dry, and the obtained polydopamine-modified white carbon Black, named modified silica-2. The mass ratio of white carbon black to dopamine is 1:0.2, and the mass ratio of white carbon black to buffer solution is 1:200.
[0056] (2) Preparation of co-coagulation rubber
[0057] Fully disperse the modified silica-2 prepared in step (1) in cyclopentane, add it into the solution-polymerized styrene-butadiene rubber-2 glue with a solid content of 0.08g / mL, and stir at 35°C After 10 hours, the solvent was removed to obtain a co-coagulation rubber composed of modified silica-2 / solution-polymerized styrene-butadiene rubber-2, which was named A-2. Wherein the polydopamine modified silica accounts for 5wt% of the solutio...
Embodiment 3
[0065] (1) Modification of silica:
[0066] The white carbon black was dried under vacuum at 110°C. Add the dry white carbon black dopamine to the prepared tris buffer solution (concentration 10mmol / L) with pH 9, react at room temperature for 3 hours, filter, wash and dry, and the obtained polydopamine-modified white carbon Black, named modified silica-3. The mass ratio of white carbon black to dopamine is 1:0.3, and the mass ratio of white carbon black to buffer solution is 1:300.
[0067] (2) Preparation of co-coagulation rubber
[0068] Fully disperse the modified silica-3 prepared in step (1) in toluene, add it to the solution-polymerized styrene-butadiene rubber-3 glue with a solid content of 0.10g / mL, and stir at 40°C for 14 hours , and the solvent was removed to obtain a coagulation rubber composed of modified silica-3 / solution polystyrene butadiene rubber-3, which was named A-3. The polydopamine-modified silica accounts for 7wt% of the solution-polymerized styrene-...
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