An ultra-light antibacterial bagasse-AgNP aerogel
An ultra-light antibacterial bagasse-AgNP aerogel
复制标题
超轻抗菌甘蔗渣-AgNP气凝胶
DOI：
10.1039/c6tb02171a
复制
发表时间：
2017-02-14
影响因子：
7
通讯作者：
Sun, Runcang
中科院分区：
文献类型：
--
作者：
Shen, Zuguang;Han, Guocheng;Sun, Runcang
这项研究首次报道了直接利用甘蔗渣作为含有纳米粒子的超轻气凝胶。首先，采用绿色路线，利用精制糖工业的副产品甘蔗渣原位合成纳米银颗粒。反应过程中，甘蔗渣中纤维素的结晶区被破坏，部分甘蔗渣部分氧化成酮类CQO，证实了甘蔗渣的还原能力。然后，将获得的甘蔗渣-AgNP复合物溶解在EmimAc中以制备含有AgNP的气凝胶。将气凝胶片状堆积起来，在水中溶胀后的重量约为干重的19倍，而且虽然气凝胶中Ag原子的摩尔比和质量比分别为5.26%和29.94%，但气凝胶的密度仅为0.035 g·cm(-3)，因此不会压碎花枝。此外，所获得的气凝胶显示出很强的抗菌作用，特别是对大肠杆菌和铜绿假单胞菌。这项研究不仅为甘蔗渣的直接应用提供了一种有趣的方式，而且还开发了一种基于生物质的抗菌超轻气凝胶，无需AgNP解离。
This study reported the direct utilization of bagasse as an ultra-light aerogel with AgNPs for the first time. Firstly, AgNPs were synthesized in situ using a green route with bagasse, a by-product of the refined sugar industry. During the reaction, the crystalline region of cellulose in bagasse was destroyed, and some groups of bagasse were partly oxidized into CQO of ketone, which confirms the reducing capacity of bagasse. Then, the obtained bagasse-AgNP composite was dissolved in EmimAc to prepare an aerogel with AgNPs. The aerogel piled up in slices, and its weight after swelling in water was about 19 times the dry weight, and the aerogel did not crush a flower branch because its density was only 0.035 g cm(-3), although the mole and mass ratios of the Ag atom were 5.26% and 29.94% in the aerogel, respectively. Furthermore, the obtained aerogel showed a strong antibacterial effect, especially against E. coli and P. aeruginosa. This study not only provides an interesting way for bagasse to be applied directly, but also develops an antibacterial biomass-based ultra-light aerogel without AgNP dissociation.