High-elasticity and wear-resistant composite foamed material and preparation method thereof
A technology of composite foaming and composite materials, applied in the field of foaming materials, can solve the problems such as the decrease of wear resistance resistance, and achieve the effects of high elongation at break, high safety and environmental protection performance, and strong wear resistance.
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[0026] (1) Preparation of modified MWCNTs: Non-covalent modification method is used to wrap the side wall of carbon nanotubes to form modified MWCNTs. Specifically, a mixed strong acid system (concentrated nitric acid and concentrated hydrochloric acid mass The ratio is 4:1), and adding 1% of the system mass of glucose oxidase and 2% of the system mass of phthalic anhydride for solvent modification;
[0027] (2) After drying PE and SEBS according to the blending ratio, add absolute ethanol as a solvent, place in a high-speed dispersing mixer, set the speed at 3000r / min, and disperse for 20 minutes;
[0028] (3) Stop the dispersion, add the required amount of modified MWCNTs in three times, adjust the rotation speed to 2000r / min, 3000r / min, 4000r / min, and disperse for 10min each time; obtain a composite material;
[0029] (4) Put the composite material in a high-pressure reactor, adjust the pressure to 15 MPa, adjust the temperature to 250° C., keep the pressure constant for 40...
Embodiment 1
[0031] A kind of highly elastic and wear-resistant composite foaming material, including the following preparation raw materials calculated by weight: Composite foaming main material 4kg (PE 60%, SEBS 20%, modified MWCNTs 20%), 4,4'-oxo Bisbenzenesulfonyl hydrazide (OBSH) 200g, zinc oxide 80g, stearic acid 60g, di-tert-butylperoxycumene (BIBP) 40g, talcum powder 2.4kg. Among them, the PE manufacturer is American Dow, the melt index MI value range of SEBS is 4.0g / 10min, and the manufacturer is American Kraton.
[0032] Its preparation method is as follows: Prepare the required raw materials as needed, put them in a closed rubber mixer for mixing and plasticizing treatment, put them in an internal mixer for mixing treatment, and carry out kneading, tableting, vulcanization and foaming, Cool forming, cutting, punching and printing to obtain the required high elasticity and wear-resistant composite foam material.
Embodiment 2- Embodiment 7
[0034] Except for the different ratios of the three components of the composite foaming main ingredient, the types and amounts of other preparation raw materials are the same as in Example 1; and the preparation method is also the same as in Example 1, and the proportions of the three components in Examples 2-7 are as follows As shown in Table 1, foamed materials were prepared under the conditions of PE mass percentages of 60%, 70%, and 80% respectively.
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