Abstract
In this work, high strength and eco-friendly black biodegradable mulch films (BMF) were prepared via a simple and low-cost process. Cellulose was dissolved in NaOH/humic acid/urea solvent and the base films were formed via a phase inversion process, then chitosan/nepheline solution with glycerol as the additive was coated on both sides to obtain the BMF. The influences of composition with different concentration on mechanical properties were studied, and the optimal composition of the BMF was found. The characteristics of the BMF were researched by means of polarized optical microscope, scanning electron microscopy, diffuse reflectance infrared fourier transform spectroscopy, thermogravimetric analysis, light transmittance property, contact angle, water vapor permeability, soil temperature analysis, and degradation test. These results showed that the BMF had good mechanical properties, thermal stability, light transmittance performance, water resistance, soil moisture retention, and great biodegradation. These results indicated that the BMF exhibited superior properties, which could facilitate the utilization of biomass materials and the replacement of traditional polyethylene mulch films.
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