Abdullayev Elshad, Lvov Yuri
Institute for Micromanufacturing, Louisiana Tech University, Ruston, LA 71272, USA.
J Mater Chem B. 2013 Jun 21;1(23):2894-2903. doi: 10.1039/c3tb20059k. Epub 2013 Apr 23.
Halloysite, naturally occurring clay nanotubes, is described as an additive for functional polymer composites. Due to the empty tubular lumen capable of being loaded with chemically active agents, halloysite provides additional functions (drug delivery, antibiotic, flame-retardant, anticorrosion, and crack self-healing) to polymeric composites synergistically combined with enhanced tensile, impact and adhesive strength. Doping loaded clay nanotubes into a polymeric matrix provides a kind of ceramic "skeleton", and these "skeleton bones" are loaded with functional chemicals like real bones loaded with marrow. Tunable controlled release of active agents through synthesis of artificial nano-caps at the tube endings and halloysite lumen enlargement by selective etching allowed for tubular nanocontainers with chemicals release time from 10 to 200 h and a loading capacity of ca. 30 wt%. Halloysite is well mixable with polymers of high and medium polarities without any surface modification.
埃洛石，一种天然存在的粘土纳米管，被描述为功能性聚合物复合材料的添加剂。由于其空的管状内腔能够负载化学活性剂，埃洛石为聚合物复合材料提供了额外的功能（药物递送、抗菌、阻燃、防腐和裂纹自修复），同时协同增强了拉伸强度、冲击强度和粘合强度。将负载的粘土纳米管掺杂到聚合物基体中可提供一种陶瓷“骨架”，并且这些“骨架骨”负载有功能性化学物质，就像真正的骨头负载有骨髓一样。通过在管端合成人工纳米胶囊以及通过选择性蚀刻扩大埃洛石内腔来实现活性剂的可调控释放，从而得到化学物质释放时间为10至200小时且负载量约为30 wt%的管状纳米容器。埃洛石无需任何表面改性就能与高极性和中极性聚合物很好地混合。
