Study on the properties of ground film paper prepared from lactic acid-modified cellulose

Abstract Lactic acid impregnated ground film paper was prepared using the method of lactic acid impregnation of raw paper. The physical properties, chemical composition, crystallinity, thermal stability, surface morphology of the paper, barrier properties, and light transmittance of the lactic acid paper were investigated using FT-IR, XRD, TGA, SEM, water vapor blocking, oxygen blocking, mechanical properties testing, and optical property testing. Results showed that at room temperature (20 °C), when lactic acid concentration was 100 %, reaction time was 48 h, and 100 °C high temperature drying prepared lactic acid paper, it exhibited superior performance: dry strength of 2.83 IkN/m, wet strength of 0.36 kN/m, Cobb value of 4.50 g/m 2 , tear of 359.42 mN, water vapor barrier of 693.46 g m −2 24 h −1 , and oxygen barrier of 933.43 cm 3 m −2 24 h −1 . Degradation rate reached 22.94 % after two weeks of soil landfill.