Supplementary Data: Effects of Carboxymethyl cellulose on mechanical, viscoelastic properties, and thermal properties of starch/plant fiber foaming tableware materials with foam structure

Supplementary data for Figure 2, Figure 4, Figure 7, Figure 8, Figure 9 and Figure 10 in the manuscript.
In this study, a new bio-based composite material of starch/plant fiber foaming tableware material reinforced with carboxymethyl cellulose (CMC) was prepared by the hot-pressing foaming method. The influence of the CMC content on the morphological structure, mechanical properties, thermal conductivity, thermal stability, Viscoelastic properties, oil resistance and biodegradability of the foam materials was systematically investigated. The experimental results showed that adding an appropriate amount of CMC (10 wt%) made the cell structure of the foam material more uniform, and improved the mechanical properties and thermal insulation capacity of the material. A dynamic mechanical thermal analysis revealed that an appropriate amount of CMC (10 wt%) can synergistically increase the storage modulus, loss modulus, and loss factor of the foam material. As for thermal properties, the addition of 10wt% CMC was beneficial for improving the thermal stability of the material and reducing thermal degradation. In addition, the increase of CMC content is beneficial to the improvement of the oil resistance and biodegradability of the starch/plant fiber foaming tableware materials. Therefore, the starch/plant fiber foaming tableware materials reinforced with CMC film-forming agent could be used as a biodegradable alternative to expanded polystyrene (EPS) tableware, reducing the use of traditional petroleum-based materials