Biodegradable nanocomposites containing nanoclay and titanium dioxide nanoparticles

摘要

In the present invention, biodegradable nanocomposites are introduced which include nanoclay particles, titanium dioxide nanoparticles, polyethylene, polypropylene, starch as a biopolymer, maleic anhydride and glycerol. The obtained nanocomposites have very high physical, mechanical and antimicrobial properties. Proper dispersion and distribution of nanoparticles in composite substrate would help in improving the quality of the product to a great extent. The presence of polypropylene next to polyethylene would eliminate the weak points of polyethylene/biopolymer composite as polypropylene helps to modify the physical and engineering properties of nanocomposites in the presence of nanoclay. Titanium dioxide nanoparticles have antimicrobial properties and would result in products which are useful for food and pharmaceutical industries. Another important aspect of this invention is the production of samples in one step by reaction extrusion method.

主权项

1. A method for preparation of Biodegradable nanocomposites comprising the following steps of:
a) Mixing nanoclay particles of at least 3% by weight with a plasticizer of choice; b) Mixing the product of step (a) with a biopolymer; wherein a ratio of said biopolymer with said plasticizer of choice is ⅓; wherein step (a) must be performed before step (b) creating a more effective intercalation; c) A batch of synthetic materials comprising compatibilizers, polyethylene and polypropylene, with anti-microbial nanoparticles were transferred into an extruder at the same time as step (b) wherein said batch and mixture of steps (a) and (b) were all added into said extruder by reactive extrusion methods; creating a final product.