Method for preparing easily mixed high filling clay/rubber nano composite material
A technology of rubber nano and composite materials, which is applied in the field of preparing easy-mixing, high-filling and high-dispersion clay/rubber nano-composites, which can solve the problems of difficult cleaning, filtration and drying of composite materials, low efficiency of drying and drying processes, and high thermal history of products. problems, to achieve the effect of less oxidation aging, increased specific surface area, and low thermal history
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Embodiment 1
[0023] Add 500 g of commercially available natural sodium-based bentonite into 10 L of deionized water, stir for 5 hours at a rotating speed of 800 r / min, and after standing for 24 hours, a clay / water suspension with a solid content of 2.0% is obtained; take 2000 g of clay / water Suspension, mix 15min with 500g styrene-butadiene rubber emulsion (SBR1502, solid content is 20%) under the rotating speed of 480r / min; The mixed solution is joined under stirring, and mass concentration is flocculation in the dilute sulfuric acid solution of 1%; The 5 μm-50 μm micelles of clay / styrene-butadiene rubber obtained by flocculation are repeatedly washed to neutrality; the water suspension of the flocculation gels is transferred to a spray drying device for spray drying treatment. The drying medium is simple hot air at 200 ° C. The outlet temperature is 100°C. The dried samples were collected to obtain a clay / styrene-butadiene rubber compound with a clay content of 40 phr.
[0024] The appe...
Embodiment 2
[0026] Add 500 g of commercially available natural sodium-based bentonite into 10 L of deionized water, stir for 5 hours at a speed of 800 r / min, and after standing for 72 hours, a clay / water suspension with a solid content of 2.0% is obtained; take 2000 g of clay / water Suspension, mix 15min with 217.4g nitrile rubber emulsion (N240S, solid content is 46%) under the rotating speed of 480r / min; The mixed solution is joined under stirring, and mass concentration is flocculation in the calcium chloride solution of 1% ;The 15μm-80μm micelles of clay / nitrile rubber obtained by flocculation are left standing repeatedly, washed with water until neutral; the water suspension of the flocculation gels is transferred to a spray drying device for spray drying treatment, and the drying medium It is pure hot air at 350°C, and the outlet temperature is 120°C. The dried samples were collected to obtain a clay / nitrile rubber mixed compound with a clay content of 40 phr.
[0027] The transmiss...
Embodiment 3
[0029] Add 500 g of commercially available natural sodium-based bentonite into 10 L of deionized water, stir for 5 hours at a speed of 800 r / min, and after standing for 72 hours, a clay / water suspension with a solid content of 2.0% is obtained; take 2000 g of clay / water Suspension, mixes 15min with 158.7g natural rubber emulsion (solid content is 63%) under the rotating speed of 480r / min; The mixed solution is joined under stirring, and mass concentration is flocculation in the aluminum chloride solution of 1%; Flocculation The 25μm-100μm micelles of the obtained clay / natural rubber were left standing repeatedly, washed with water until neutral; the water suspension of the flocculated gels was transferred to a spray drying device for spray drying treatment, and the drying medium was 100°C heat Air, using microwaves to heat atomized droplets to replenish energy, the outlet temperature is 80°C. The dried samples were collected to obtain a clay / natural rubber compound with a clay...
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Abstract
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