The microstructure and surface properties of spin coated films were studied to determine the structuration of Acacia gum films depending on gum type and composition. The difference between A. seyal and A. senegal films was clearly evidenced by surface morphology (SEM and AFM) and through the contact angle measurement: A. senegal films having a smoother and more hydrophobic surface (θ$\text{θ}$ = 62°) than A. seyal films (θ$\text{θ}$ = 42°) characterized by aggregated structuration. The film hydrophobicity increased with glycerol addition for both gum films (A. senegal , θ$\text{θ}$ = 68° and A. seyal ,$\text{θ}$ = 50°). This reduction could be due to hydrogen-bonding between hydroxyl groups of plasticizer and polar groups of Acacia gums favoring their reduction on films surface. Both gum films behave as dual polar surface showing high disperse component of free energy compared to the polar component Both gums showed strong affinity for apolar compounds (θ$\text{θ}$ < 20°). The overall results indicated that the structuration of films depended on the protein content and accessibility. Similar surface properties were found with self-supported films: A. seyal cast films being still more hydrophilic than A. senegal ones, demonstrating that the former provides a more favorable environment for water interaction than the latter. The specific interactions pointed for each gum films with water and apolar compounds were reflected in functionality such as water vapor permeability and efficiency to retain limonene and linalool. The knowledge of these properties is recommended to design specific coatings anticipating water loss of the coated product and to evaluate antimicrobial efficiency when active agents as aroma compounds are incorporated in the film.

研究了旋涂膜的微观结构和表面性质，以确定取决于胶类型和组成的阿拉伯胶树胶膜的结构。通过表面形态（SEM和AFM）以及接触角测量可以清楚地证明A. seyal和A.塞内加尔薄膜之间的差异：A.塞内加尔的薄膜具有更光滑，更疏水的表面（θ$\text{θ}$= 62°）比A. seyal电影（θ$\text{θ}$= 42°）的特征在于聚集结构。对于两种胶膜，膜的疏水性都随着甘油的添加而增加（塞内加尔，θ$\text{θ}$= 68°和A. seyal，$\text{θ}$= 50°）。这种减少可能是由于增塑剂的羟基与阿拉伯胶的极性基团之间的氢键作用，有利于它们在薄膜表面的还原。两种胶膜均表现为双极性表面，与极性组分相比表现出较高的自由能分散组分两种胶均显示出对非极性化合物的强亲和力（θ$\text{θ}$<20°）。总体结果表明，膜的结构取决于蛋白质含量和可及性。自支撑膜也发现了相似的表面特性：A. seyal流延膜的亲水性仍比A.塞内加尔膜强，这表明前者比后者提供了更有利的水相互作用环境。每种胶膜与水和非极性化合物的特定相互作用反映在功能上，例如水蒸气渗透性和保留柠檬烯和芳樟醇的效率。建议了解这些特性的知识，以设计可预期涂层产品失水的特定涂料，并评估将活性成分作为香气化合物掺入薄膜时的抗菌效率。