Hydrophobic biochar composite material and preparation method thereof

The invention belongs to the technical field of environmental new functional materials, and discloses a hydrophobic biochar composite material and a preparation method thereof.The hydrophobic biochar composite material comprises biochar, and the surface of the biochar is modified with a copolymer of sulphobetaine and acrylamide; the preparation method of the hydrophobic biochar composite material comprises the following steps: taking acrylamide and [2-(methylacryloyloxy) ethyl] dimethyl-(3-sulfonic acid propyl) ammonium hydroxide as raw materials, taking ammonium persulfate as an initiator, taking N, N, N, N-tetramethylethylenediamine as an accelerator, and carrying out a reaction at the temperature of 60-80 DEG C to obtain the hydrophobic biochar composite material. The preparation method comprises the following steps: preparing a copolymer of sulphobetaine and acrylamide, and modifying the copolymer on the surface of biochar through physical adsorption and chemical action, specifically, putting the biochar