| abstract |
The invention discloses a saline-alkali soil covering film, which comprises the following components: the composite material comprises ethylene and vinyl ketone copolymer, cellulose derivative, photolysis agent microspheres, plasticizer and antioxidant, wherein the photolysis agent microspheres comprise free radical type photoinitiator, amylopectin, fly ash, weathered coal powder and water glass. The invention utilizes amylopectin, fly ash, weathered coal powder and water glass to coat the free radical type photoinitiator, the film can not be rapidly degraded in the early stage of the use of the film, and the free radical type photoinitiator is exposed to initiate the photodegradation reaction of the film under the damage of soil water and soil of saline-alkali soil on the basis of the degradation formed by ethylene and vinyl ketone copolymer and cellulose derivative in the later stage, so that the covering film is rapidly degraded. |