Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Islamic Republic of Iran; Nanotechnology and Advanced Materials Institute, Isfahan University of Technology, Isfahan, 84156-83111, Islamic Republic of Iran.
Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Islamic Republic of Iran.
Carbohydr Polym. 2017 Jun 15;166:377-386. doi: 10.1016/j.carbpol.2017.02.086. Epub 2017 Feb 22.
The attempt of this study was to modify chitosan/poly(vinyl alcohol) (CS/PVA) matrix properties using Starch/Multi-Walled Carbon Nanotube (MWCNT)-Valine (SMV) nanocomposite (NC) as a new filler. To prevent aggregation and obtain homogeneous dispersion of MWCNT into the matrix, at first the surface of MWCNTs was covalently modified by Valine as a natural amino acid. Then, modified MWCNT was incorporated into the starch matrix for the preparation of SMV NC. In the second step, different concentrations of prepared SMV NCs (30, 50 and 70wt.%) were embedded to the CS-PVA matrix by ultrasonication technique for the fabrication of CS-PVA/SMV NC films. The effect of SMV NC on the properties of CS-PVA was studied by different techniques. Thermogravimetric analysis indicated that the thermal stability of the CS-PVA was enhanced after incorporation with nanofillers. The results indicated that prepared NCs were promising adsorbents for the removal of Cd(II) ions from the aqueous solution.
本研究旨在通过使用淀粉/多壁碳纳米管（MWCNT）-缬氨酸（SMV）纳米复合材料（NC）作为新型填充剂来改性壳聚糖/聚乙烯醇（CS/PVA）基质的性质。为了防止 MWCNT 的聚集并使其在基质中均匀分散，首先通过将 Valine（一种天然氨基酸）接枝到 MWCNT 的表面来对其进行共价改性。然后，将改性的 MWCNT 掺入淀粉基质中以制备 SMV NC。在第二步中，通过超声技术将不同浓度（30、50 和 70wt.%）的制备好的 SMV NC 嵌入到 CS-PVA 基质中，以制备 CS-PVA/SMV NC 薄膜。通过不同的技术研究了 SMV NC 对 CS-PVA 性能的影响。热重分析表明，加入纳米填料后 CS-PVA 的热稳定性得到了提高。结果表明，所制备的 NC 是从水溶液中去除 Cd(II)离子的有前途的吸附剂。
