The indiscriminate use of petroleum-based polymers and plastics for single-use food packaging has led to serious environmental problems due the non-biodegradable characteristics. Thus, much attention has been focused on the research of new biobased and biodegradable materials. Yeast and fungal biomass are low-cost and abundant sources of biopolymers with highly promising properties for the development of biodegradable materials. This study aimed to select a preparation method to develop new biodegradable films using the whole biomass of Paecilomyces variotii subjected to successive physical treatments including ultrasonic homogenization (US) and heat treatment. Sterilization process had an important impact on the final filmogenic dispersion and mechanical properties of the films. Longer US treatments produced a reduction in the particle size and the application of an intermediate UT treatment contributed favorably to the breaking of agglomerates allowing the second US treatment to be more effective, achieving an ordered network with a more uniform distribution. Samples that were not filtrated after the sterilization process presented mechanical properties similar to plasticized materials. On the other hand, the filtration process after sterilization eliminated soluble and hydratable compounds, which produced a reduction in the hydration of the films.

由于不可生物降解的特性，滥用石油基聚合物和塑料用于一次性食品包装已导致严重的环境问题。因此，新型生物基和可生物降解材料的研究受到了人们的广泛关注。酵母和真菌生物质是低成本且丰富的生物聚合物来源，对于开发可生物降解材料具有非常有前景的特性。本研究旨在选择一种制备方法，利用经过超声波均质（US）和热处理等连续物理处理的拟青霉整个生物质来开发新型可生物降解薄膜。灭菌过程对最终成膜分散性和薄膜的机械性能有重要影响。较长的 US 处理会导致粒径减小，并且中间 UT 处理的应用有利于团聚物的破裂，从而使第二次 US 处理更加有效，实现分布更均匀的有序网络。灭菌过程后未过滤的样品表现出与塑化材料相似的机械性能。另一方面，灭菌后的过滤过程消除了可溶性和可水合的化合物，这导致薄膜的水合减少。