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Atom transfer radical polymerization from cellulose fibers at ambient temperature
1Department of Polymer Technology, Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
Journal of the American Chemical Society
|February 7, 2002
Summary
Researchers grafted cellulose fibers with poly(methyl acrylate) using atom transfer radical polymerization. This created highly hydrophobic cellulose papers with controllable polymer grafting, demonstrating a novel surface modification technique.
Area of Science:
- Materials Science
- Polymer Chemistry
- Surface Chemistry
Background:
- Cellulose is a hydrophilic biopolymer with diverse applications.
- Surface modification of cellulose is crucial for tailoring its properties.
- Atom Transfer Radical Polymerization (ATRP) offers controlled grafting capabilities.
Purpose of the Study:
- To graft poly(methyl acrylate) onto cellulose fibers using ATRP.
- To investigate the surface properties of the modified cellulose.
- To demonstrate control over the grafting process.
Main Methods:
- Cellulose fibers were functionalized with 2-bromoisobutyryl bromide.
- Poly(methyl acrylate) was grafted from the cellulose surface via ATRP using Me6-TREN and Cu(I)Br.
- Fourier-transform infrared (FT-IR) spectroscopy was used to analyze grafted polymer amounts.
- Size exclusion chromatography (SEC) characterized the grafted polymer.
Main Results:
- Successful grafting of poly(methyl acrylate) onto cellulose fibers was achieved.
- The resulting polymer-grafted cellulose papers exhibited significantly increased hydrophobicity (contact angle of 133 degrees).
- FT-IR analysis confirmed that the amount of grafted polymer could be controlled by adjusting the sacrificial initiator concentration.
- SEC analysis showed narrow polydispersities, indicating controlled polymerization.
Conclusions:
- Atom transfer radical polymerization provides an effective method for surface-initiated grafting onto cellulose.
- The hydrophobic modification of cellulose papers is controllable and tunable.
- This technique offers potential for developing advanced cellulosic materials with tailored surface properties.
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