Sigma-Aldrich 685445 Halloysite nanoclay 100 gr
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Sigma-Aldrich 685445 Halloysite nanoclay 100 gr |
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Synonym(s): Kaolin clay
Linear Formula: Al2Si2O5(OH)4 · 2 H2O
CAS Number: 1332-58-7
Molecular Weight: 294.19
EC Number: 310-194-1
MDL number: MFCD11045913
PubChem Substance ID: 329760969
NACRES: NA.23
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PROPERTIES
form nanopowder
Quality Level 100
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
DESCRIPTION
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 gr in poly bottle
Legal Information
Product of Applied Minerals, Inc. Customers may obtain additional technical support and purchase commercial quantities at appliedminerals.com |