Preparation of biocidal 4‐ethyl‐4‐(hydroxymethyl)oxazolidin‐2‐one‐based N‐halamine polysiloxane for impregnation of polypropylene in supercritical CO2. Issue 33 (6th May 2018)

• Record Type: Journal Article
• Authors: Chen, Yong; He, Qingkun; Ren, Guoyuan; Feng, Chunyan; Li, Na; Yu, Hao; Han, Qiuxia
• Is Part Of: Journal of applied polymer science. Volume 135:Issue 33(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-05-06
• Subjects: biocidal surface -- EHMO-based N-halamine polysiloxane -- polypropylene -- supercritical impregnation; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.46624
• Languages: English
• ISSNs: 0021-8995

Abstract

ABSTRACT: A cyclic N ‐halamine precursor, 4‐ethyl‐4‐(hydroxymethyl)oxazolidin‐2‐one (EHMO), was synthesized and attached to poly(methylhydrosiloxane) (PMHS) through silane alcoholysis between the OH of EHMO and SiH of PMHS. The alcoholysis product was chlorinated with tert ‐butyl hypochlorite to transfer the NH to NCl and obtain an EHMO‐based N ‐halamine polysiloxane. The N ‐halamine polysiloxane was impregnated into inert polypropylene (PP) fibers and formed a 72 nm coating layer using supercritical carbon dioxide (scCO2 ) as solvent and swelling reagent at 28 MPa and 50 °C for biocidal application. The overall synthetic procedure and the impregnation process were characterized by FTIR, XPS, and SEM, respectively. The N‐halamine polysiloxane layer on PP imparted potent antibacterial abilities against both Staphylococcus aureus and Escherichia coli while pristine ones did not exhibit noticeable killing activities. Stability tests showed that the N ‐halamine polysiloxane layer was resistant to washing cycles, storage, and UV irradiation and the rechlorination of lost chlorines was good. The strategy of using CO2 ‐philic PMHS as carrier polymer and scCO2 as working solvent for impregnation presents a general and friendly procedure to functionalize inert substrates without the need of chemical linkage and organic solvent. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2018, 135, 46624. Abstract :