Composite films of natural clay nanotubes with cellulose and chitosan
Composite films of natural clay nanotubes with cellulose and chitosan
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DOI：
10.1680/gmat.14.00014
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发表时间：
2014-12-01
期刊：
影响因子：
1.9
通讯作者：
Lvov, Yuri
中科院分区：
文献类型：
--
作者：
Cavallaro, Giuseppe;Lazzara, Giuseppe;Lvov, Yuri
基于纤维素、壳聚糖和埃洛石粘土纳米管的复合膜使用溶液浇铸法制备，该方法允许纳米管在材料内均匀分布并提供对复合物的形态的控制。这些生物纳米复合材料的机械性能受湿度的影响，纳米管显示出对聚合物基体的塑化作用。壳聚糖和埃洛石纳米管（HNTs）的复合材料，具有改性的疏水内腔，导致了可控和可持续的表面清洁技术。用HNTs改性的木质纤维素木材微纤维也通过逐层组装生产。所获得的材料代表了一种非常适合制造用于生物医学应用的纸张的复合材料，其中增强的孔隙率可能是至关重要的。对生物聚合物-埃洛石复合材料进行的毒性测试表明，这些纳米复合材料对细胞培养物是安全的，高达0.5 mg/mL的游离粘土纳米管。
Composite films based on cellulose, chitosan and halloysite clay nanotubes were prepared using a solution casting method, which allowed for a uniform distribution of nanotubes within the material and provided control over the morphology of the composite. The mechanical performance of these bio nanocomposites is influenced by humidity and the nanotubes showed a plasticisation effect on the polymeric matrix. The composites of chitosan and halloysite nanotubes (HNTs), with modified hydrophobic inner lumens, resulted in a technique for controlled and sustainable surface cleaning. Lignocellulose wood microfibres modified with HNTs were also produced by a layer-by-layer assembly. The obtained material represents a composite well suited for making paper sheets for biomedical applications, where enhanced porosity can be crucial. Toxicity tests carried out on biopolymer-halloysite composites showed that these nanocomposites are safe for cell cultures up to 0.5 mg/mL of free clay nanotubes.