This article presents the development of laminate biocomposite via film stacking technique (FST) represents a method for processing fiber-reinforced thermoplastic laminate composites. The primary difficulty is the compatibility between the hydrophilic natural fibers and the hydrophobic PLA. With these limitations, the utilization of fiber content exceeding 50 wt% remains unfeasible. The PVA-based adhesives spraying technique is used to improve compatibility. Additionally, the effect of four different compatibilizer adhesives applied between the layers was examined: polyvinyl alcohol (PVA), PVA modified with 3-(trimethoxysilyl) propyl methacrylate (modified PVA), PVA-microfibrillated cellulose (PVA-MFC), and PVA-MFC modified with 3-(trimethoxysilyl) propyl methacrylate (modified PVA-MFC). The findings of the study demonstrate that the natural fibers/PLA laminate biocomposite comprises 65 wt% fiber and 35 wt% PLA, thus achieving successful preparation of laminate biocomposites containing over 50 wt% fibers using the FST technique. In comparison to PVA, modified PVA elevated the flexural strength of the laminate biocomposite by up to 122 %. The modified PVA-MFC compatibilizer, when compared with modified PVA, enhanced impact strength by up to 148 %, reduced surface polarity by 31 %, and notably improved thermal stability. In a QUV accelerated weathering test, all the laminates exhibited reduced flexural modulus and flexural strength, but the flexural strength of all the tested materials remained above 50 MPa. In soil burial tests, the PVA laminate exhibited the most rapid decomposition, whereas the modified PVA-MFC laminate demonstrated a notably slower degradation rate. Accelerated weathering notably increased the decomposition of the materials in soil. The modified PVA-MFC laminate emerged as the optimal material for producing a high-strength biodegradable laminate biocomposite, due to its superior mechanical and thermal properties, rendering them suitable for applications requiring structural support, such as interior construction, stage floors, furniture, and building interior decoration materials.

来源平台：INDUSTRIAL CROPS AND PRODUCTS