A Brief Review of the Latest Advances of Attapulgite as a Reinforcing Agent in Polymer Matrix Nanocomposites

Abstract

The development of polymeric nanocomposites using clay minerals as a Nano filler is of great interest to researchers and industry. Many clay minerals are used to modify the properties of the polymers; this strategy improves the thermal and mechanical performance and changes the surface finishing and the processing characteristics. The Attapulgite (ATP), which is a clay mineral of the hydrated magnesium silicates family, has gained prominence in recent years because it combines low cost and high performance. It has a large surface area, strong absorption capacity superior to any other natural mineral, good mechanical resistance and thermal stability. These properties make ATP an ideal candidate for reinforcing polymeric materials. Different approaches and emerging technologies have been applied to improve the thermal and mechanical properties of polymer/ATP nanocomposites which can extend the different chemical treatments used in ATP. Therefore, this review article presents the latest advances related to the use of ATP in the development of polymeric nanocomposites, showing future perspectives for new trends in ATP applications. In general, ATP modifies the mechanical properties of polymers, either in the natural or modified state. And is a good alternative for the replacement of lamellar clays such as montmorillonites with the advantage of having a lower cost and a wide world market to be explored, that which drive new trends in applications for ATP, such as flame retardant of cotton fabrics, dye adsorption, hydrogel membranes for wound dressing, sustainable packaging and fuel cell applications.

Influence of Organic-Modified Inorganic Matrices on the Optical Properties of Palygorskite–Curcumin-Type Hybrid Materials

“…Palygorskite is currently treated with cationic substances [16,17], hydroxylamine derivatives [18] or silanes [19][20][21][22] to promote the adsorption of naturally occurring or synthesized organic compounds. Most often, these are essential oils [23], dyes [24][25][26] or enzymes [27] loaded on the inorganic matrices, resulting in hybrid materials that preserve their original properties in different environments, in which factors, such as light, temperature, or pH, can degrade organic compounds.…”

“…Most often, these are essential oils [23], dyes [24][25][26] or enzymes [27] loaded on the inorganic matrices, resulting in hybrid materials that preserve their original properties in different environments, in which factors, such as light, temperature, or pH, can degrade organic compounds. The processes of loading inorganic matrices with bioactive compounds take place through ion exchange processes, adsorption at microwaves or ultrasound-assisted processes [20,28,29]. Such hybrid materials usually have antioxidant or antimicrobial properties and are used in the food and pharmaceutical industry [30][31][32][33].…”