Method of using inorganic nanometer functional powder for reinforcing medium resistance of vulcanized rubber
An inorganic nano-functional powder technology, applied in the field of nano-material modified and reinforced rubber, can solve the problems of not achieving ideal results, rapid decline in mechanical properties, difficulty in dispersion and processing, etc.
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Embodiment 1
[0016] Take 200g of a slurry containing 20% of the mass fraction of nano-calcium carbonate (particles 10-50nm), place the slurry in a high-shear mixing emulsifier with a rotation speed of 5500rpm and disperse it for 60 minutes, then add polyacrylic acid under high-speed stirring Sodium dispersant 50g, warming up to 50°C, then adding 15ml concentration of 10% Na 2 SiO 3 solution, slowly drop 40ml of H at a concentration of 1mol / l at this temperature 2 SO 4 The solution was adjusted to pH 4. After the reaction is completed, keep warm for half an hour, filter with suction, wash, dry, and pulverize to obtain nano-calcium carbonate / silicon oxide hydrate-coated nano-calcium carbonate modified particles.
[0017] Through XPS quantitative analysis, the relative percentages of Ca, Si and C on the surface of nano-calcium carbonate before and after modification can be obtained, and the results are shown in Table 1 below. It can be seen from Table 1 that the relative percentages of ...
Embodiment 2
[0021] The process and process of this embodiment are the same as those of the above-mentioned embodiment 1, except that after half an hour of heat preservation, 1% to 6% sodium stearate of calcium carbonate mass is made into a 5% solution and slowly added to the calcium carbonate slurry React, heat up to 75°C for reaction, keep warm for another half an hour, filter with suction, dry, and pulverize to prepare nano-calcium carbonate / silicon oxide hydrate / sodium stearate double-layer coated nano-calcium carbonate modified particles.
[0022] Aiming at the modified samples of nano-calcium carbonate / silicon oxide hydrate / sodium stearate surface properties, the amount of sodium stearate added in the experiment was 0%, 1%, 2%, 3%, 4%, 5%, 6% were tested for settleability. figure 1 It is the figure of influence of sodium stearate addition on powder sedimentation volume.
[0023] From figure 1 It can be seen that the sedimentation volume of the powder after modification is significa...
Embodiment 3
[0025] The effect of different parts of nano barite on the properties of the rubber was tested.
[0026] Table 2 sizing formula components (parts by weight)
[0027]
[0028] Add zinc oxide, stearic acid, anti-aging agent RD, anti-aging agent 4020, carbon black N234, nano-barite, paraffin oil in order according to Table 2 in the natural rubber, and finally add the accelerator NOBS and sulfur, and pack it five times. Press 150℃×t on the flat vulcanizing machine after thin pass 90 The vulcanization process is vulcanized, and the samples are made according to the national standard.
[0029] The mechanical properties of the above samples were tested by instruments, and the test results are shown in Table 3 below:
[0030] Table 3 Rubber performance test results after adding nano-barite
[0031]
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