Hydrophobic modification of wood via surface-initiated ARGET ATRP of MMA

► ARGET ATRP is employed to graft MMA onto wood surface. ► Both the ratio of sacrificial initiator to the monomer and the polymerization time positively influence the amount of MMA polymer grafting. ► Hydrophobic wood surface with contact angles ranged from 101.5̊ to 130̊. To convert the hydrophilic...

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Bibliographic Details
Published in:Applied surface science 2012-01, Vol.258 (7), p.2529-2533
Main Authors: Fu, Yanchun, Li, Gang, Yu, Haipeng, Liu, Yixing
Format: Article
Language:English
Subjects:
ARGET ATRP
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Contact angle
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Fourier transforms
Grafting
Hydrophobic
Infrared spectroscopy
MMA
Physics
Polymerization
Polymethyl methacrylates
Surface chemistry
Surface modification
Wood
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Summary:► ARGET ATRP is employed to graft MMA onto wood surface. ► Both the ratio of sacrificial initiator to the monomer and the polymerization time positively influence the amount of MMA polymer grafting. ► Hydrophobic wood surface with contact angles ranged from 101.5̊ to 130̊. To convert the hydrophilic surface of wood into a hydrophobic surface, the present study investigated activators regenerated by electron transfer for atom transfer radical polymerization (ARGET ATRP) as a method of grafting methyl methacrylate (MMA) onto the wood surface. The wood treated with 2-bromoisobutyryl bromide and with the subsequently attached MMA via ARGET ATRP under different polymerization times (2h, 4h, 6h, 8h) were examined using scanning electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis. All the analyses confirmed that PMMA had been grafted onto the wood surface. Water contact angle measurement proved that the covering layer of PMMA on wood made the surface hydrophobic. Polymerization time had a positive influence on the contact angle value and higher contact angle can be produced with the prolongation of the polymerization time. When the reaction time was extended to 8h, the contact angle of treated wood surface reached 130° in the beginning, and remained at 116° after 60s. The ARGET ATRP method may raise an alteration on the wood surface modification.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2011.10.087