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Double-layer Composite Film of Natural Materials and Mulch Film Application
Author(s)
Pinpru, Nattapong
Charoonsuk, Thitirat
Phanasun, Thanong
Soponpong, Machima
Bongkarn, Theerachai
Woramongkolchai, Somsak
Date Issued
July 1, 2022
Type
Article
Abstract
In this work, double-layer mulch composite film was prepared from natural materials (bacterial cellulose; BC, alginates, carboxymethyl cellulose; CMC, and calcium hydrogen phosphate; CaHPO4) by the solvent casting method. The BC/CaHPO4 film was casted as a second layer and serves two purposes: soil water absorption and slow-release fertilizer. The mechanical properties of the double layer film are significantly improved by using the double-layer casting technique with the tensile strength of 17.4 MPa and the percentage of elongation at break of 78.7%. The percentage of water absorption and biodegradation was increased to 60% and 48.7%, respectively, within 30 days. Morphological evidence confirmed that the double-layer composite film degraded gradually, as cracks appeared on its surface when buried in soil for a longer period of time. This result was consistent with increasing biodegradation percentage. In addition, the double-layer composite film fully supported the decrease in temperature and increase of soil moisture via ultra violet (UV) protection.
Citation
Chiang Mai Journal of Science, 49(4), 1135-1149, 2022