Characterization of UV-induced graft polymerization of poly(acrylic acid) using optical waveguide spectroscopy

被引:15
作者
Chu, Li-Qiang
Tan, Wee-Jin
Mao, Hai-Quan
Knoll, Wolfgang
机构
[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany
[2] Natl Univ Singapore, Singapore 117543, Singapore
[3] Johns Hopkins Singapore, Div Biomed Sci, Singapore 138669, Singapore
[4] Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA
[5] Johns Hopkins Univ, Whitaker Biomed Engn Inst, Baltimore, MD 21218 USA
关键词
D O I
10.1021/ma060562o
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
UV-induced graft polymerization is a simple and effective method for the surface modification and functionalization of polymeric materials. The structure of poly(acrylic acid) (PAAc) grafted onto a polymeric surface by UV-induced graft polymerization of acrylic acid was investigated using optical waveguide spectroscopy (OWS). The PAAc graft layer exhibited a large increase in thickness in water compared to that in the dry state due to the swellability of the PAAc chains. Its thickness further increased with increasing the pH of the aqueous solution. This could be attributed to the increased electrostatic repulsion of the carboxylate anions on the PAAc chains, as the ionization degree of the carboxylic groups increases with pH. The thickness of the PAAc graft layer is dependent on the graft condition employed, including the UV intensity and irradiation time, and the AAc monomer concentration. On the basis of these data, we propose a model for the structure of the PAAc graft layer and a PAAc layer modified by galactose ligands.
引用
收藏
页码:8742 / 8746
页数:5
相关论文
共 26 条
[1]   Synthesis and swelling behavior of a weak polyacid brush [J].
Biesalski, M ;
Johannsmann, D ;
Rühe, J .
JOURNAL OF CHEMICAL PHYSICS, 2002, 117 (10) :4988-4994
[2]   Swelling of a polyelectrolyte brush in humid air [J].
Biesalski, M ;
Rühe, J .
LANGMUIR, 2000, 16 (04) :1943-1950
[3]   Stable immobilization of rat hepatocyte spheroids on galactosylated nanofiber scaffold [J].
Chua, KN ;
Lim, WS ;
Zhang, PC ;
Lu, HF ;
Wen, J ;
Ramakrishna, S ;
Leong, KW ;
Mao, HQ .
BIOMATERIALS, 2005, 26 (15) :2537-2547
[4]   Atomic force microscopic analysis of a porous membrane with pH-sensitive molecular valves [J].
Iwata, H ;
Hirata, I ;
Ikada, Y .
MACROMOLECULES, 1998, 31 (11) :3671-3678
[5]   Polymer surface with graft chains [J].
Kato, K ;
Uchida, E ;
Kang, ET ;
Uyama, Y ;
Ikada, Y .
PROGRESS IN POLYMER SCIENCE, 2003, 28 (02) :209-259
[6]   Interfaces and thin films as seen by bound electromagnetic waves [J].
Knoll, W .
ANNUAL REVIEW OF PHYSICAL CHEMISTRY, 1998, 49 :569-638
[7]  
Knoll W, 1997, HDB OPTICAL PROPERTI, VII, P373
[8]   Water-soluble poly(acrylic acid) grafted luminescent silicon nanoparticles and their use as fluorescent biological staining labels [J].
Li, ZF ;
Ruckenstein, E .
NANO LETTERS, 2004, 4 (08) :1463-1467
[9]   Surface-initiated photopolymerization of poly(ethylene glycol) methyl ether methacrylate on a diethyldithiocarbamate-mediated polymer substrate [J].
Luo, N ;
Hutchison, JB ;
Anseth, KS ;
Bowman, CN .
MACROMOLECULES, 2002, 35 (07) :2487-2493
[10]   A novel sequential photoinduced living graft polymerization [J].
Ma, HM ;
Davis, RH ;
Bowman, CN .
MACROMOLECULES, 2000, 33 (02) :331-335