Methylcellulose-carbon nano tube derivatives and preparation method thereof
A technology of methyl cellulose and carbon nanotubes, applied in the field of nanomaterials and natural polymers, can solve the problems of natural polymer derivatives - methylcellulose covalently modified carbon nanotubes, and other problems, and meet the preparation conditions. Easy to satisfy, stable chemical structure, good application prospects
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Embodiment 1
[0035] A methylcellulose-carbon nanotube derivative with a mass content ratio of methylcellulose and carbon nanotubes of about 1.2:1, which is based on ball milling, purification and acidification of the original carbon nanotubes, and halogenated Reagent reaction, the carboxylic acid group on the surface of the carbon nanotube is converted into a highly reactive acid halide group, and then reacted with a binary functional organic compound to extend the active functional group from the surface of the carbon nanotube, and then react with the trichloro s-triazine reaction to obtain active carbon nanotubes containing chlorotriazine rings that can react with hydroxyl groups on the surface, and finally prepare them through nucleophilic substitution reaction with methyl cellulose. The specific preparation method is as follows:
[0036] The carbon nanotubes were first pretreated according to the following steps: 15 stainless steel balls with a diameter of 6-8mm and 25g of unpurified c...
Embodiment 2
[0042] A methylcellulose-carbon nanotube derivative with a mass content ratio of methylcellulose and carbon nanotubes of about 0.5:1, the specific preparation method of which is as follows:
[0043] The carbon nanotubes are firstly pretreated, and the pretreatment method is the same as that of the above-mentioned embodiment 1.
[0044] Then take 14 g of pretreated carbon nanotubes and add them to 850 ml of acetone dissolved with 80 g of phosphorus tribromide, stir at 30 ° C for 5 h, and after ultrasonic reaction at 60 ° C for 48 h, centrifuge at 3000 rpm for 50 min, wash with ether After cleaning, vacuum-dry at 30° C. for 36 hours to obtain carbon nanotubes with acid halide functional groups on the surface.
[0045] Take 8 g of carbon nanotubes with acid halide functional groups on the surface, add them to 600 ml of N-methylpyrrolidone containing 55 g of 1,3-propylenediamine and 18 ml of triethylamine, stir at 35° C. for 5 h, and then, under nitrogen protection, After ultraso...
Embodiment 3
[0049] A methylcellulose-carbon nanotube derivative with a mass content ratio of methylcellulose and carbon nanotubes of about 0.2:1, the specific preparation method of which is as follows:
[0050] The carbon nanotubes are firstly pretreated, and the pretreatment method is the same as that of the above-mentioned embodiment 1.
[0051] Then take 1 g of pretreated carbon nanotubes and add them to 100 ml of xylene dissolved with 1 g of thionyl chloride, stir at 50 ° C for 1 h, and after ultrasonic reaction at 30 ° C for 72 h, centrifuge at a speed of 4000 rpm for 10 min. After being washed with carbon chloride, it was vacuum-dried at 20° C. for 24 hours to obtain carbon nanotubes with acid halide functional groups on the surface.
[0052]Take 0.1 g of the above-mentioned carbon nanotubes with acid halide functional groups on the surface, add them to 100 ml of acetone containing 5 g of 1,3-diethylene glycol and 1 ml of lutidine, stir at 30° C. for 1 h, and then, under nitrogen pr...
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