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685445

Halloysite nanoclay

Synonym(s):

Kaolin clay

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About This Item

Linear Formula:
Al2Si2O5(OH)4 · 2 H2O
CAS Number:
1332-58-7
Molecular Weight:
294.19
NACRES:
NA.23
PubChem Substance ID:
329760969
UNSPSC Code:
12162002
EC Number:
310-194-1
MDL number:
MFCD11045913
Form:
nanopowder
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form

nanopowder

Quality Segment

100

diam. × L

30-70 nm × 1-3 μm , nanotube

surface area

64 m2/g

color

75-96, Hunter Brightness

refractive index

n20/D 1.54

pore size

1.26-1.34 mL/g pore volume

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.

Legal Information

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

Storage Class

11 - Combustible Solids

wgk

nwg

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

685445-500G: + 685445-100G: + 685445-VAR: + 685445-BULK:

jan

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