Abstract The objective of this study was to prepare pectin films (PEC) activated by copaiba oil (CP) nanoemulsions (NE). CP-NE were added to film-forming formulations based on pectin and then dried into films by continuous casting. Chemical, morphological, thermal, mechanical and antimicrobial properties were studied in addition to biodegradability by the respirometer test. In general, the nanoemulsions were suitably dispersed in the PEC matrix, both phases showing good interaction and compatibility. The nanoemulsions caused large changes in PEC, such as increased roughness with oil concentration, gradual reduction of the elastic modulus and tensile strength, increased elongation at break, and antimicrobial activity against S. aureus and E. coli. Another important observation was the maintenance of the biodegradation profile of the films after the addition of CP-NE. In conclusion, the active pectin film manufactured with CP emulsions showed great potential for active food packaging and is a promising alternative to reduce environmental impacts.

中文翻译：

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载有copaiba油纳米乳液的果胶薄膜可用作生物基活性包装

摘要 本研究的目的是制备由苦白巴油（CP）纳米乳液（NE）活化的果胶膜（PEC）。CP-NE 被添加到基于果胶的成膜配方中，然后通过连续浇铸干燥成薄膜。除了通过呼吸计测试的生物降解性外，还研究了化学、形态、热、机械和抗菌特性。一般而言，纳米乳液适当地分散在 PEC 基质中，两相均表现出良好的相互作用和相容性。纳米乳液引起 PEC 的巨大变化，例如随着油浓度的增加粗糙度增加，弹性模量和拉伸强度逐渐降低，断裂伸长率增加，以及对金黄色葡萄球菌和大肠杆菌的抗菌活性。另一个重要的观察结果是添加 CP-NE 后薄膜的生物降解特性的保持。总之，用CP乳液制造的活性果胶薄膜在活性食品包装方面显示出巨大的潜力，是减少环境影响的有前途的替代品。