skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Water distributions in PS-b-P(S-g-PEO) block grafted copolymer system in aqueous solutions revealed by contrast variation SANS study

Abstract

In this report, we present a contrast variation small angle neutron scattering (SANS) study of PS-b-P(S-g-PEO) block graft copolymers in aqueous media at a concentration of 10 mg/ml. Through varying the solvent D2O/H2O ratio, the scattering contributions from the water molecules and the micellar constituent components can be determined. Based on the commonly used core-shell model, a theoretical coherent scattering cross section incorporating the effect of water penetration is developed and used to analyze the SANS I(Q), we have successfully quantified the micellar structure and the number of - water molecules associated with the core and corona. We have found that the overall micellar hydration level increase with the increase in the molecular weight of hydrophilic PEO side chains. This study provides key information in understanding solvent distributions within self-assembled amphiphilic block grafted copolymers.

Authors:
 [1];  [1];  [1];  [2];  [3];  [4];  [1]
  1. ORNL
  2. Rensselaer Polytechnic Institute (RPI)
  3. National Institute of Standards and Technology (NIST)
  4. City University of New York (CUNY)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1000897
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Langmuir
Additional Journal Information:
Journal Volume: 133; Journal Issue: 14; Journal ID: ISSN 0743-7463
Country of Publication:
United States
Language:
English

Citation Formats

Chen, Wei-Ren, Hong, Kunlun, Li, Xin, Liu, Emily, Liu, Yun, Shew, Chwen-Yang, and Smith, Gregory Scott. Water distributions in PS-b-P(S-g-PEO) block grafted copolymer system in aqueous solutions revealed by contrast variation SANS study. United States: N. p., 2010. Web.
Chen, Wei-Ren, Hong, Kunlun, Li, Xin, Liu, Emily, Liu, Yun, Shew, Chwen-Yang, & Smith, Gregory Scott. Water distributions in PS-b-P(S-g-PEO) block grafted copolymer system in aqueous solutions revealed by contrast variation SANS study. United States.
Chen, Wei-Ren, Hong, Kunlun, Li, Xin, Liu, Emily, Liu, Yun, Shew, Chwen-Yang, and Smith, Gregory Scott. 2010. "Water distributions in PS-b-P(S-g-PEO) block grafted copolymer system in aqueous solutions revealed by contrast variation SANS study". United States.
@article{osti_1000897,
title = {Water distributions in PS-b-P(S-g-PEO) block grafted copolymer system in aqueous solutions revealed by contrast variation SANS study},
author = {Chen, Wei-Ren and Hong, Kunlun and Li, Xin and Liu, Emily and Liu, Yun and Shew, Chwen-Yang and Smith, Gregory Scott},
abstractNote = {In this report, we present a contrast variation small angle neutron scattering (SANS) study of PS-b-P(S-g-PEO) block graft copolymers in aqueous media at a concentration of 10 mg/ml. Through varying the solvent D2O/H2O ratio, the scattering contributions from the water molecules and the micellar constituent components can be determined. Based on the commonly used core-shell model, a theoretical coherent scattering cross section incorporating the effect of water penetration is developed and used to analyze the SANS I(Q), we have successfully quantified the micellar structure and the number of - water molecules associated with the core and corona. We have found that the overall micellar hydration level increase with the increase in the molecular weight of hydrophilic PEO side chains. This study provides key information in understanding solvent distributions within self-assembled amphiphilic block grafted copolymers.},
doi = {},
url = {https://www.osti.gov/biblio/1000897}, journal = {Langmuir},
issn = {0743-7463},
number = 14,
volume = 133,
place = {United States},
year = {2010},
month = {1}
}