Thermal stability and flame retardant effects of halloysite nanotubes on poly(propylene)

Development and characterization of co-loaded curcumin/triazole-halloysite systems and evaluation of their potential anticancer activity

“…In particular, the curcumin encapsulated in p-HNT shows a higher degradation temperature (536 C) as compared to the pure compound (323 C). This striking enhancement of the thermal stability can be due to encapsulation of the degradation products into the nanotube lumen (Cavallaro et al, 2011;Du et al, 2006). It is intriguing to notice that loaded f-HNT3a-b showed two differential degradation peaks for curcumin (401 and 320 C for 3a; 570 and 320 C for 3b), which can be attributed to the molecules at the outer surface and incorporated into the cavity (Fig.…”

Escalating Applications of Halloysite Nanotubes

“…Polymer chains and decomposition products can enter the lumens of the HNTs, slowing mass transport and considerably improving the thermal stability. The thermal stability of HNTs-PP nanocomposites was improved 46 . HNTs can also appreciably improve the decomposition temperature of PVA 47 , PLA, VER 32 , chitosan 13 , EPDM 19 , starch 38 and apple pectin 48 .…”

“…Halloysite nanotubes for flame resistance The following polymers have been selected for flame resistance LLDPE 53 , PP 46 , PBT, ABS 54 , PES 55 , NBR 56 , and soy protein 57 . HNTs exhibited a decline of flammability of the related polymers appreciably without loss of mechanical properties.…”

“…The thermal stability of HNTs based polypropylene nanocomposites is highly increased due to the presence of HNTs and iron in HNTs. Because of barriers present between heat and mass transport as well as the iron in HNTs significantly increase the thermal stability and reduce the flammability 58 . Poly ethylene graft is used as interfacial modifier in the LLDPE/ HNTs composites, in this way the mechanical properties, flame retardency and thermal stability are increased.…”

Thermal stability and flammability of butadiene–styrene rubber nanocomposites

“…11). Yano et al [30] experimental and theoretical work reported that polymer/clay nanocomposites, the permeability coefficient of volatile gases, such as water vapor and He, was remarkably decreased. The observed ''labyrinth effect'' is also thought to play important role in thermal stability improving of polymer/MMT nanocomposites since composite material having poor dispersity of MMT usually exhibit no thermal improvement or the effect is poor in comparison to well exfoliated or intercalated nanocomposites.…”