Abstract：
The fragility of the skeleton and poor bioaccessibility limit Silica aerogel\'s application in the food industry. In this study, composite gels were obtained by cross-linking pea proteins isolate (PPI) with Tetraethoxysilane (TEOS)to improve the bioavailability of silica-derived aerogels. It indicated that TEOS first condensed with H+ to form secondary particles and then complexed with PPI via hydroxyl groups to form a composite aerogel. Meanwhile, the PPI-Si composite aerogel formed a dense mesoporous structure with a specific surface area of 312.5 g/cm3. This resulted in a higher oil holding percentage of 89.67 % for the PPI (10 %)-Si aerogel, which was 34.1 % higher than other studies, leading to a more stable oleogel. Finally, as a delivery system, the composite oleogel not only could significantly increase the bioaccessibility rate by 27.4 % compared with silica aerogel, but also could efficiently inhibit the premature release of curcumin in the simulated gastric fluids, while allowed sustainably release in the simulated intestinal fluids. These results provided a theoretical basis for the application of silica-derived aerogels in food and non-food applications.
摘要：
骨架的脆弱性和生物可及性差限制了二氧化硅气凝胶在食品工业中的应用。在这项研究中,通过将豌豆蛋白分离物（PPI）与四乙氧基硅烷（TEOS）交联获得复合凝胶，以提高二氧化硅衍生的气凝胶的生物利用度。这表明TEOS首先与H+缩合形成次级颗粒,然后通过羟基与PPI络合形成复合气凝胶。同时,PPI-Si复合气凝胶形成了比表面积为312.5g/cm3的致密介孔结构。这导致PPI（10％）-Si气凝胶的较高持油百分比为89.67％，比其他研究高出34.1%，导致更稳定的油凝胶。最后,作为一个传递系统，与二氧化硅气凝胶相比，复合油凝胶不仅能显著提高生物可及性27.4%，还能有效抑制模拟胃液中姜黄素的过早释放，同时允许在模拟肠液中持续释放。这些结果为二氧化硅衍生的气凝胶在食品和非食品中的应用提供了理论依据。
