A kind of preparation method of epoxidized natural rubber organic/inorganic hybrid material
A technology of natural rubber and hybrid materials, applied in the field of rubber, can solve the problems of excessive performance, pollution and disadvantage of composite materials, and achieve the effects of environmental protection, low cost and low cost of raw materials
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Embodiment 1
[0041] The first step is to add 30g of precipitated white carbon black (pre-silica, particle diameter of 5nm) to tap water to prepare a suspension with a mass concentration of 10%, and stir;
[0042] In the second step, sodium methylene dinaphthalene sulfonate with an amount of 0.5wt% of the precipitated silica was added dropwise to the suspension obtained in the first step, and stirred at 40°C for 24h; the modified silica slurry was taken out, After rinsing and centrifugation for 3 times, dry at a constant temperature of 30°C to constant weight;
[0043] The third step is to blend the silicon dioxide modified in the second step and solid ENR-20 according to different proportions on a mill at 30°C, and knead for 30 minutes to obtain the ENR / pre-silica hybrid blend;
[0044] Step 4 The ENR / pre-silica hybrid blend in the third step was vulcanized on a flatbed machine at a vulcanization temperature of 180°C for 15 minutes to obtain a vulcanized ENR-20 / pre-silica hybrid material. ...
Embodiment 2
[0049] The first step is to add 30g of precipitated white carbon black (pre-silica, particle diameter of 20um) to ethanol to prepare a suspension with a mass concentration of 25%, and stir;
[0050] In the second step, triethanolamine with an amount of 15wt% of precipitated silica was added dropwise to the suspension obtained in the first step, and stirred at 100°C for 6 hours; the modified silica slurry was taken out, rinsed and centrifuged for 3 times , 80 ℃ constant temperature drying to constant weight;
[0051] The third step is to blend the silicon dioxide modified in the second step and the solid ENR-35 according to the mass ratio of 1:1 on an open mill at 65°C, and at the same time, dropwise add ENR-35 with 7.75wt% butadiene Alkenic acid anhydride was opened for 5 minutes to obtain the ENR / pre-silica hybrid blend;
[0052] Step 4 The ENR / pre-silica hybrid blend in the third step was vulcanized on a flatbed machine at a vulcanization temperature of 140°C for 60 minutes...
Embodiment 3
[0057] The first step is to add 30g of halloysite (HNTs, particle diameter of 50nm) to tap water to prepare a suspension with a mass concentration of 17.5%, and stir;
[0058] In the second step, sodium methylene diisopropylnaphthalene sulfonate with an amount of 7.75 wt% of HNTs was added dropwise to the suspension obtained in the first step, and stirred at 70°C for 15 hours; the modified HNTs were taken out, rinsed and centrifuged 3 times Afterwards, dry at a constant temperature of 55°C to constant weight;
[0059] In the third step, the HNTs modified in the second step and the solid ENR-50 were blended in different proportions on an open mill at 100°C, and at the same time, boron trifluoride with an amount of 2 wt% of HNTs was added dropwise, and the kneading was carried out for 17.5 minutes. Obtain ENR / HNTs hybrid blend;
[0060] Step 4 The ENR / HNTs hybrid blend in the third step was vulcanized on a flatbed machine at a vulcanization temperature of 160°C for 37.5 minutes...
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