Effect of surface property of halloysite on the crystallization behavior of PBAT
Effect of surface property of halloysite on the crystallization behavior of PBAT
复制标题
埃洛石表面性质对PBAT结晶行为的影响
DOI：
10.1016/j.clay.2018.02.005
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发表时间：
2018-06-01
影响因子：
5.6
通讯作者：
Ren, Penggang
中科院分区：
文献类型：
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作者：
Li, Xujuan;Tan, Daoyong;Ren, Penggang
以埃洛石（Hal）、煅烧Hal和有机硅烷改性Hal为填料制备了Hal/PBAT纳米复合材料。采用XRD、SEM、XPS、FTIR、DSC、POM和Avrami、Jeziomy、Kissinger模型等表征了Hal的表面性质及其对纳米复合材料结晶形态、结构和动力学的影响。有机硅烷改性的煅烧Hal或煅烧Hal与PBAT酯中的C-（C=O）-O表面的-NH 2或-OH基团之间形成氢键，有效地增强了Hal纳米填料的成核能力，导致结晶温度升高，半衰期缩短，但阻碍了PBAT分子链的传输。氢键越强，这种影响越显著。这项研究提供了一个很有前途的方法，定制的表面特性的Hal操纵可生物降解的芳香族聚酯的结晶，特别是与极低负载的Hal纳米填料。
Halloysite (Hal), calcined Hal, and organosilane-modified Hal were used as filler for the preparation of Hal/PBAT nanocomposite. XRD, SEM, XPS, FTIR, DSC, POM, and Avrami, Jeziomy, Kissinger models were used to characterize the surface property of Hal and its effect on the crystallization morphology, structure and kinetics of nanocomposites. Hydrogen bonding, generated between -NH2 or -OH groups on surface of organosilane-modified calcined Hal or calcined Hal and C-(C=O)-O in ester of PBAT, efficiently enhanced the nucleation ability of Hal nanofiller, resulting in increment of crystallization temperature, decrease of half time, but retard the transport of PBAT molecules chains. The stronger the hydrogen bond was, the more remarkable such influence was. This study provides a promising approach of tailoring the surface characteristic of Hal to manipulate the crystallization of biodegradable aliphatic-aromatic polyesters, especially with extreme low loading of Hal nanofiller.