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685445

Sigma-Aldrich

Halloysite nanoclay

Synonym(s):
Kaolin clay
Linear Formula:
Al2Si2O5(OH)4 · 2 H2O
CAS Number:
Molecular Weight:
294.19
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.23

Quality Level

form

nanopowder

diam. × L

30-70 nm × 1-3 μm , nanotube

color

75-96, Hunter Brightness

refractive index

n20/D 1.54

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)

SMILES string

O.O.O[Si](O)(O[Al]=O)O[Si](O)(O)O[Al]=O

InChI

1S/2Al.H4O7Si2.2H2O.2O/c;;1-8(2,3)7-9(4,5)6;;;;/h;;1-2,4-5H;2*1H2;;/q2*+1;-2;;;;

InChI key

HEFIDAICLOZRRO-UHFFFAOYSA-N

General description

Halloysite nanoclay has a tube like morphology. It shows low electrical, thermal conductivity and strong hydrogen interactions, on account of which the inner hydroxyl groups show greater stability than the surface hydroxyl groups in halloysite. The loss of hole water occurs at nearly 300 °C.
Similar to montmorillonite, halloysite consists of two layers of aluminosilicate in 1:1 Al:Si ratio. Significant improvements in thermal, mechanical properties have been reported on addition of halloysite nanotubes in polymer composites.

Application

Halloysite is frequently used as a reinforcement in various nanocomposites, some of which are listed here:
Isotactic propylene-halloysite nanocomposites.
Alloy composites by electroless/ autocatalytic deposition.
Poly(butylene terephthalate) (PBT) composites.
Zinc–halloysite nanotube (HNT) composite coatings.
Halloysite nanotube–hydroxyapatite–hyaluronic acid films.
Halloysite combined with polyamide, polypropylene, poly(ε-caprolactone) and fluroelastomers.
Its tube like morphology, high aspect ratio, and low percolation enables interesting applications as reinforcements in nanocomposites.

Packaging

100, 500 g in poly bottle

Legal Information

Product of Applied Minerals, Inc. Customers may obtain additional technical support and purchase commercial quantities at appliedminerals.com

Storage Class Code

11 - Combustible Solids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

More Documents

Quotes and Ordering

Lvov Y. et al.
Colloids Surf., 198-200, 375-375 (2002)
Development of high performance electroless Ni?P?HNT composite coatings
Ranganatha S, et al.
Applied Surface Science, 263, 149-156 (2012)
S R Levis et al.
International journal of pharmaceutics, 243(1-2), 125-134 (2002-08-15)
Halloysite supplied from New Zealand was shown by electron microscopy to be composed mainly of hollow microtubules having typical dimensions of 2-3 microm long and 0.3/0.1 microm outer/inner diameter. Aggregates of microtubules, double tubules and occasional split or partially unrolled
Du M. et al.
Eur. Polymer J., 42, 1362-1362 (2006)
Fabrication and electrochemical characterization of Zn?halloysite nanotubes composite coatings
Ranganatha S and Venkatesha TV
Royal Society of Chemistry Advances, 4, 31230-21238 (2014)

Articles

Halloysite Nanotubes Applications in Nanomaterials Research

Halloysite Nanotubes in Nanomaterials Research. Halloysite, a naturally occurring aluminosilicate nanotube, has been undeservedly forgotten.

Nano Minerals: Nanoclays

Nanoclays are nanoparticles of layered mineral silicates. Montmorillonite, bentonite, and halloysite nanoclays and organoclays are used in polymer-clay nanocomposites, as rheology modifiers, and drug delivery carriers.

Graphene Nanoribbons: Production and Applications

Graphene is a one-atomic-layer thick two-dimensional material made of carbon atoms arranged in a honeycomb structure. Its fascinating electrical, optical, and mechanical properties ignited enormous interdisciplinary interest from the physics, chemistry, and materials science fields.

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

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