Accession Number:

ADA455775

Title:

Transport Properties of N-Methyloated Nylon-6: Chitosan Blend Membranes

Descriptive Note:

Final rept. Oct 2005-Jun 2006

Corporate Author:

ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE

Personal Author(s):

Report Date:

2006-09-01

Pagination or Media Count:

22.0

Abstract:

A series of N-Methylolated Nylon-6 chitosan blend membranes was evaluated for their potential use as breathable high water transport barriers low chemical agent transport for military and civilian protective clothing apparel. Nylon-6 was methylolated and subsequently blended with chitosan at different compositions and processing conditions room temperature, 100 C, and 200 C. Vapor transport rates of water breathability and dimethyl methylphosphonate protection a simulant of the nerve agent Sarin were measured as a function of these blend parameters with the use of a modified ASTM American Society for Testing Materials method E-96-95 and were compared to Nafion 117. Water transport rate was found to be between 1,000 and 2,000 gm2day, depending on specific composition of the membranes and thermal treatment. The effective dimethylmethylphosphonate permeability a thickness independent value of the blend membranes was two orders of magnitude lower than Nafion 117. The selectivity of N-Methylolated Nylon-6 chitosan blend was 15.3, seven times higher than Nafion 117. It was shown that these membranes, manufactured when hydrophilic and hydrophobic polymers were conjoined, have resulted in a material that is both breathable and protective. These semi-permeable membranes will be economically attractive for military and civilian applications in the area of personal protection since the polymer components are inexpensive and the membrane fabrication is simple.

Subject Categories:

  • Chemical, Biological and Radiological Warfare
  • Life Support Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE