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Title: Poly(L-lysine) and Clay Nanocomposite with Desired Matrix Secondary Structure: Effects of Polypeptide Molecular Weight

Abstract

Nanocomposites (NC) were formed using cationic poly(L-lysine) (PLL), a semicrystalline polypeptide, that was reinforced by sodium montmorillonite (MMT) clay via solution intercalation technique. By varying solution conditions such as pH, temperature, and polypeptide concentration in the presence of clay platelets, the secondary structure of PLL was controllably altered into {alpha}-helical, {beta}-sheet, and random coil. The high molecular weight polypeptide shows a strong propensity to fold into the {beta}-sheet structure when cast as films, irrespective of the initial secondary structure in solution. Nanocomposite local morphology confirms intercalated MMT platelets with PLL over a wide range of compositions.

Authors:
;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
930416
Report Number(s):
BNL-81148-2008-JA
Journal ID: ISSN 0887-6266; JPBPEM; TRN: US200904%%537
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Polymer Science Part B: Polymer Physics; Journal Volume: 45; Journal Issue: 3
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; CLAYS; MOLECULAR WEIGHT; MORPHOLOGY; NANOSTRUCTURES; POLYPEPTIDES; COMPOSITE MATERIALS; LYSINE; CLATHRATES; national synchrotron light source

Citation Formats

Hule,R., and Pochan, D. Poly(L-lysine) and Clay Nanocomposite with Desired Matrix Secondary Structure: Effects of Polypeptide Molecular Weight. United States: N. p., 2007. Web. doi:10.1002/polb.21027.
Hule,R., & Pochan, D. Poly(L-lysine) and Clay Nanocomposite with Desired Matrix Secondary Structure: Effects of Polypeptide Molecular Weight. United States. doi:10.1002/polb.21027.
Hule,R., and Pochan, D. Mon . "Poly(L-lysine) and Clay Nanocomposite with Desired Matrix Secondary Structure: Effects of Polypeptide Molecular Weight". United States. doi:10.1002/polb.21027.
@article{osti_930416,
title = {Poly(L-lysine) and Clay Nanocomposite with Desired Matrix Secondary Structure: Effects of Polypeptide Molecular Weight},
author = {Hule,R. and Pochan, D.},
abstractNote = {Nanocomposites (NC) were formed using cationic poly(L-lysine) (PLL), a semicrystalline polypeptide, that was reinforced by sodium montmorillonite (MMT) clay via solution intercalation technique. By varying solution conditions such as pH, temperature, and polypeptide concentration in the presence of clay platelets, the secondary structure of PLL was controllably altered into {alpha}-helical, {beta}-sheet, and random coil. The high molecular weight polypeptide shows a strong propensity to fold into the {beta}-sheet structure when cast as films, irrespective of the initial secondary structure in solution. Nanocomposite local morphology confirms intercalated MMT platelets with PLL over a wide range of compositions.},
doi = {10.1002/polb.21027},
journal = {Journal of Polymer Science Part B: Polymer Physics},
number = 3,
volume = 45,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}