Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of Laponite on the structure, thermal stability and barrier
  properties of nanocomposite gelatin films   The effect of Laponite (a synthetic clay) on the structure, thermal and water
vapor barrier properties of nanocomposite gelatin films produced by casting
with 0, 4.5 and 15% w Lap/w gelatin, was studied. X-ray diffraction,
differential scanning calorimetry, thermogravimetric analysis and Fourier
transform infrared spectroscopy measurements were reported. The X-ray
diffraction patterns showed dual crystalline structure of the films with
collagen-type bundles of triple helices, intercalated inside clay platelets,
increasing interlayer distances. Depending on the renaturation of
triple-helices and Laponite content, the glass transition temperatures
substantially decreased. The amount of helices decreased with Lap
concentration, affecting the enthalpy of melting. The nanocomposite gelatin
films showed improved thermal stability. Changes of water vapor permeability
could be related to the presence of larger free volume of the coils and
intercalated structures, facilitating water transfer through the film.

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The categories of this paper are: ao-sci
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
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The categories of this paper are: q-fin
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The categories of this paper are: chem-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: eess
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
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The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph