Preparation method for degradable liquid-state mulching film by using livestock manure as raw material

A preparation method for a degradable liquid-state mulching film by using livestock manure as a raw material, comprising the steps of:

• (1) pulverizing dried livestock manure with a pulverizer, followed by sieving with a sieve to obtain livestock manure powder;
• (2) stirring the livestock manure powder obtained in step (1) with water at 10-90° C. and a stirring rate of 100-3000 r/min for 1-10 h to obtain a livestock manure slurry;
• (3) mixing the livestock manure slurry obtained in step (2) with a stabilizer, an inorganic material and water, and stirring a mixture at 10-90° C. and a stirring rate of 100-3000 r/min for 0.1-10 h to obtain a homogeneous suspension of livestock manure;
• (4) mixing the suspension of livestock manure obtained in step (3) with a surfactant, a grafted monomer mixture, a plasticizer and water, and stirring a mixture at 10-90° C. and a stirring rate of 100-3000 r/min for 0.1-10 h to obtain a pre-emulsified mixed liquid of livestock manure;
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• (5) raising a temperature of the pre-emulsified mixed liquid of livestock manure obtained in step (4) to 30-90° C., adding an aqueous solution of an initiator at a stirring rate of 100-3000 r/min, allowing a mixture to react for 0.1-10 h at a constant temperature and stirring rate, cooling a reaction system to room temperature, and adjusting a pH of the system to 5.0-10.0 with aqueous ammonia to obtain a liquid-state mulching film liquid.