Rubber composition and vulcanized rubber and method for their preparation
A rubber composition and epoxidized rubber technology, applied in the field of vulcanized rubber, can solve the problems of rubber anti-wet slip performance, low rolling resistance, antistatic property of rubber, etc., and achieve the effects of low rolling resistance, solving static electricity accumulation and simple process
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[0016] According to one embodiment of the present invention, described graphene-modified epoxy rubber can be made by following method:
[0017] (1) mixing graphite oxide with a solution containing a dispersant, then contacting the obtained mixture with a chemical reducing agent, so that the graphene oxide is reduced to obtain graphene;
[0018] (2) The graphene of step (1) is mixed with the epoxidized rubber selected from epoxidized isoprene rubber and / or epoxidized butadiene rubber.
[0019] In the present invention, the graphite oxide can be prepared by chemically oxidizing graphite. Generally, the chemical oxidation methods include Brodie method, Staudenmaier method and Hummers method (including improved Hummers method). From the perspective of improving reaction efficiency and reaction safety, it is preferred that the graphite oxide is prepared by a modified Hummers method. The specific process of preparing the graphite oxide may include: first contacting graphite with an...
preparation example 1
[0072] This preparation example is used to illustrate the preparation method of the graphene-modified epoxidized isoprene rubber of the present invention.
[0073] (1) Preparation of graphite oxide
[0074] In this experiment, the improved Hummers method was used to prepare graphite oxide. The specific steps are as follows:
[0075] Mix 3g of graphite and 18g of potassium permanganate into the flask, slowly add a mixed solution of concentrated sulfuric acid and concentrated phosphoric acid with a volume of 360mL and 40mL respectively into the flask under an ice-water bath, and control the temperature of the solution in the flask to 35-40°C. The reaction solution was stirred at 50° C. for 12 hours. After cooling to room temperature, the reaction solution was poured into a mixture of 3 mL of 30% hydrogen peroxide and 400 mL of ice water to obtain a bright yellow product, which was centrifuged and vacuum-dried to obtain graphite oxide.
[0076] (2) Preparation of graphene
[007...
preparation example 2
[0083] This preparation example is used to illustrate the preparation method of the graphene-modified epoxidized isoprene rubber of the present invention.
[0084] Graphite oxide and graphene were prepared in the same manner as in Preparation Example 1.
[0085] (1) Preparation of epoxidized isoprene rubber
[0086] Add 50g of isoprene rubber and 500mL of toluene into a 1L flask, keep stirring at a constant temperature of 50°C, add 0.32mol of 88% formic acid after dissolution, and then dropwise add 0.32mol of 30% hydrogen peroxide. After reacting for 2 hours, it was washed with distilled water to neutrality, the organic phase was rotary evaporated, and vacuum-dried to obtain epoxidized isoprene rubber EIR40 with an epoxy degree of 40%.
[0087] (2) Preparation of graphene-modified epoxidized isoprene rubber
[0088] Disperse 1 g of the graphene prepared above into tetrahydrofuran to obtain a graphene dispersion with a concentration of 3 mg / mL, and add it to 200 mL of tetrahy...
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