Preparation method of cellulose nanocrystal/carbon black/natural rubber composite
A nano-microcrystalline and natural rubber technology, applied in the field of rubber, can solve problems such as high energy consumption, high pollution, and dependence on petroleum resources, and achieve the effects of low cost, increased cross-linking density, and superior mechanical properties
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Embodiment 1
[0061] The first step is to place 169.5g of 59% natural rubber latex (equivalent to 100g dry rubber) in a 1L beaker, and stir for 15min at room temperature;
[0062] In the second step, at 60°C, add 5g of nanocrystalline cellulose to 100g of 95% ethanol solution, adjust the pH to 5 with acetic acid, add 0.5g of coupling agent A151, and stir for 90min;
[0063] The third step is to add the nano-microcrystalline cellulose to the uniformly stirred natural rubber latex, and stir and mix for 45 minutes at room temperature;
[0064] The fourth step is to pour the well-stirred natural rubber / nano-microcrystalline cellulose mixture into the tray, and spray 10% mass fraction of CaCL 2 The solution is demulsified, co-precipitated, washed for 20 hours, and dried in a blast drying oven at 60°C to a constant weight to obtain a solid natural rubber / nano-microcrystalline cellulose mixture;
[0065] In the fifth step, the obtained solid natural rubber (100g dry rubber) / nanometer microcrystalline cellu...
Embodiment 2
[0069] The first step is to place 169.5g of 59% natural rubber latex (equivalent to 100g dry rubber) in a 1L beaker, and stir for 15min at room temperature;
[0070] In the second step, 0g, 5g, 10g, 15g, 20g, 25g of nano-microcrystalline cellulose were added to 0g, 50g, 100g, 150g, 200g, 250g of 95% ethanol solution at 60℃. 6 samples, adjust the pH to 7, add 0g, 0.5g, 1.0g, 1.5g, 2.0g, 2.5g coupling agent Si-69 to the 6 samples respectively, stir and react for 90min;
[0071] The third step is to add the nano-microcrystalline cellulose to the uniformly stirred natural rubber latex, and stir and mix for 45 minutes at room temperature;
[0072] The fourth step is to pour the well-stirred natural rubber / nano-microcrystalline cellulose mixture into the tray, and spray CaCL with a mass fraction of 10% 2 Demulsification of the solution, co-sedimentation and washing for 20 hours, drying to constant weight at 60°C in a blast drying oven, to obtain a solid natural rubber / nano-microcrystalline...
Embodiment 3
[0075] In the first step, 169.5g of 59% natural rubber latex (equivalent to 100g of dry rubber) was placed in a 1L beaker, and stirred for 20min at room temperature;
[0076] In the second step, 0g, 5g, 10g, 15g, 20g, 25g of nanocrystalline cellulose were added to 0g, 50g, 100g, 150g, 200g, 250g of 95% ethanol solution (NCC's The mass is 10% of the mass of the ethanol solution), adjust the pH to 5 with acetic acid, then add 0g, 0.5g, 1.0g, 1.5g, 2.0g, 2.5g coupling agent NDZ102, and stir for 120min;
[0077] The third step is to add nano-microcrystalline cellulose to the uniformly stirred natural rubber latex, and stir and mix for 60 minutes at room temperature;
[0078] The fourth step is to pour the well-stirred natural rubber / nano-microcrystalline cellulose mixture into the tray, and spray CaCL with a mass fraction of 10% 2 The solution is demulsified, co-sedimented, washed for 24 hours, and dried to constant weight at 60°C in a blast drying oven to obtain a solid natural rubber / n...
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