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The polyvinyl alcohol (PVA)/halloysite nanotubes (HNTs) solution were prepared with the aid of ultrasonic treatment. The composite films were prepared through casting or coagulating the PVA/HNTs solution. The coagulation process was employed to obtain a composite film without aggregation of HNTs. It is shown that the particle size and distribution of HNTs in the PVA/HNTs solution is independent of...
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