Halloysite nanoclay is a natural and non-toxic nanomaterial falling under the kaolin subgroup of clay minerals, has a unique tubular morphology. Its external layer consists of silica (Si-O-Si) and the internal tube core is alumina (Al-OH), with different chemical compositions and electric charges on its inner and outer surfaces. The unique structure and properties of halloysite nanoclay make it expected to become a widely used and promising nanomaterial.
Figure 1. Images of halloysite nanoclay .
(A) Transmission electron microscopy image (TEM); (B) Scanning electron microscopy image (SEM);
Halloysite nanoclay is often used as a reinforcement material in nanocomposites, particularly in polymer matrices. Its main functions are as follows:
- Enhance mechanical properties: The high aspect ratio and large surface area of halloysite nanoclay can significantly enhance the mechanical properties of nanocomposites. For example, the tensile strength, modulus and toughness of the composites were significantly enhanced by the addition of halloysite nanoclay.
- Improve thermal stability: Halloysite nanoclay also helps to improve the thermal stability of nanocomposites. Nanoclay acts as a thermal barrier, reducing heat transfer within the composite material. This makes the composite more resistant to temperature fluctuations, which is critical in applications that require high temperature resistance, such as the automotive and aerospace industries.
- Enhance barrier properties: Halloysite nanoclay improves the barrier properties of polymers by forming a tortuous path that restricts the diffusion of gas molecules through the polymer matrix . This makes halloysite reinforced nanocomposites an excellent choice for packaging materials.
|Chemical Name||Halloysite nanoclay|
|Diam. × L||30-70 nm × 1-3 μm , nanotube|
|Color||75-96, Hunter brightness|
|Pore Size||1.26-1.34 mL/g pore volume|
|Surface Area||64 m2/g|
|Capacity||8.0 meq/g cation exchange capacity|
|Density||2.53 (true specific gravity)|
The high-quality halloysite nanoclay we provide is sold well in more than 20 countries and regions around the world. If you need, please feel free to contact us.
- Lvov, Y. M.; et al. The application of halloysite tubule nanoclay in drug delivery. Expert Opinion on Drug Delivery. 2016, 13(7): 977-986.
- Xavier, J. R. Investigation into the effects of silanized nanoclay on the barrier properties of epoxy resin in chloride environment. Journal of Molecular Structure. 2022, 1264: 133264.