Starch-Based Layer by Layer Assembly: Efficient and Sustainable Approach to Cotton Fire Protection
Starch-Based Layer by Layer Assembly: Efficient and Sustainable Approach to Cotton Fire Protection
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DOI：
10.1021/acsami.5b02507
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发表时间：
2015-06-10
影响因子：
9.5
通讯作者：
Bourbigot, S.
中科院分区：
文献类型：
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作者：
Carosio, F.;Fontaine, G.;Bourbigot, S.
通过逐层组装，淀粉被用于构建高效且可持续的生物基涂料，能够保护棉花免受火灾。为了更好地了解涂层与基材的关系，在不同密度（即 100、200 和 400 g/m(2)）的棉织物上测试了涂层效率。所采用的沉积条件可以形成均匀的涂层。即使在少量的沉积步骤中，也描述了物理和化学机制并与所取得的结果相关。根据热重分析评估，该涂层可以大大增强纤维素的成炭能力，使棉花在高温下产生的热稳定有机残留物的量几乎增加一倍。仅沉积 2 个双层后，这种生物基系统就能够在可燃性测试中自熄火焰，且沉积在棉花上的重量少于 5%。即使涂层以最高密度沉积在棉花上，也能保持这种高效率。通过锥形量热法，所有经过处理的棉花在燃烧过程中释放的总热量均显着减少（高达 40%），从而证明了所实现的高效率。
Starch has been employed Via layer by layer assembly for building an efficient and sustainable biobased coatings capable of protecting cotton from fire. In order to obtain a better understanding of the coating to substrate relationship, the coating efficiency has been tested on cotton fabrics having different densities (i.e., 100, 200 and 400 g/m(2)). The adopted deposition conditions allow for the buildup of a homogeneous coating. even at a low number of deposition steps, The physical and chemical mechanisms are described and related to the achieved results. The coating can greatly enhance the char forming ability of cellulose, nearly doubling the amount of thermally stable organic residue produced by cotton at high temperatures, as assessed by thermogravimetric analyses. After only 2 bilayers deposited, this biobased system is capable of self-extinguishing a flame during flammability tests with less than 5% in weight deposited on cotton. This high efficiency is kept even when the coating is deposited on cotton with the highest density. By cone calorimetry, all treated cottons showed significant reductions (up to 40%) of the total heat released during combustion, thus demonstrating the high efficiency achieved.