National Laboratory of Nanotechnology LANOTEC - National Center of High Technology CeNAT, 1.3 km north from the USA embassy, San José, Costa Rica.
Technical University of Costa Rica, UTN, San Carlos, Costa Rica.
Sci Rep. 2018 Jul 10;8(1):10417. doi: 10.1038/s41598-018-28444-4.
Silica in plant tissues has been suggested as a component for enhancing mechanical properties, and as a physical barrier. Pineapples present in their shell and bracts rosette-like microparticles that could be associated to biogenic silica. In this study, we show for the first time that silica-based microparticles are co-purified during the extraction process of nanocellulose from pineapple (Ananas comosus). This shows that vegetable biomass could be an underappreciated source, not only for nanocellulose, but also for a highly valuable sub-product, like 10 µm biogenic rosette-like silica-based microparticles. The recovery yield obtained was 7.2 wt.%; based on the dried initial solid. Due to their size and morphology, the microparticles have potential applications as reinforcement in adhesives, polymer composites, in the biomedical field, and even as a source of silica for fertilizers.
植物组织中的硅被认为是一种增强机械性能的成分，也是一种物理屏障。菠萝的外壳和苞片中存在着类似玫瑰花的微粒子，这些微粒子可能与生物硅有关。在这项研究中，我们首次表明，在从菠萝（菠萝）中提取纳米纤维素的过程中，基于硅的微粒子是共同纯化的。这表明蔬菜生物质不仅是纳米纤维素的未被充分认识的来源，而且也是高价值的副产品，例如 10 µm 生物玫瑰花形硅基微粒子。所获得的回收产率为 7.2wt％；基于初始干燥固体。由于其尺寸和形态，这些微粒子在作为增强剂用于粘合剂、聚合物复合材料、生物医学领域，甚至作为肥料用硅源方面具有潜在的应用。
