Biomass full-biodegradable moisturizing mulching film and preparation method thereof

• Main Authors: WU LINKAI, SHUI YUJIE, HUANG XIN, HU XUEFEI, YANG TAO, DU JIANHUA, GAO KAI, GAO CHEN, ZOU ZHIHUI
• Format: Patent
• Language: Chinese; English
• Published: 10.05.2024
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

The invention discloses a biomass full-biodegradable moisturizing mulching film and a preparation method thereof, and belongs to the technical field of degradable mulching films. The degradable moisturizing mulching film is specifically prepared from the following raw materials in parts by weight: 5 to 15 parts of biomass ash, 10 to 20 parts of charcoal, 30 to 40 parts of modified starch, 20 to 55 parts of polylactic acid/poly (butylene adipate-co-terephthalate) copolymer, 3 to 18 parts of plasticizer, 3 to 10 parts of compatibilizer and 0.5 to 1.0 part of processing aid. The preparation method comprises the following steps: mixing and ball-milling biomass ash and biochar to obtain a biomass raw material, then mixing modified starch with water, adding the biomass raw material, the polylactic acid/poly (butylene adipate-co-terephthalate) copolymer, the plasticizer, the compatibilizer and the processing aid, uniformly mixing, and carrying out extrusion molding to obtain the composite material. Extruding and gra