Abstract
We propose a simple and quantitative method to evaluate thickness of crosslinked surface layer (tx) for superabsorbent poly(acrylic acid) (PAA) materials using a fluorescent dye of rhodamine B (RhB). The electrostatic attraction between the cationic amine group of dye and the anionic carboxylate group of PAA allows us to measure the fluorescent contrast since the surface-crosslinking causes a significant decrease in concentration of carboxylate group compared to that of inner region. Our method utilizing the distinct adsorption difference of RhB visualizes the crosslinked surface (or shell) layer and successfully demonstrates a direct characterization of tx in a dry state of superabsorbent materials, regardless of irregular particle shape.
| Original language | English |
|---|---|
| Pages (from-to) | 33-36 |
| Number of pages | 4 |
| Journal | Materials Letters |
| Volume | 228 |
| DOIs | |
| Publication status | Published - 2018 Oct 1 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
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Direct measurement of crosslinked surface layer in superabsorbent poly(acrylic acid). / Ha, Jisoo; Kim, Minsu; Lee, Wooseop; Lee, Hoyeon; Han, Changsun; Koh, Won Gun; Ryu, Du Yeol.
In: Materials Letters, Vol. 228, 01.10.2018, p. 33-36.Research output: Contribution to journal › Article
TY - JOUR
T1 - Direct measurement of crosslinked surface layer in superabsorbent poly(acrylic acid)
AU - Ha, Jisoo
AU - Kim, Minsu
AU - Lee, Wooseop
AU - Lee, Hoyeon
AU - Han, Changsun
AU - Koh, Won Gun
AU - Ryu, Du Yeol
PY - 2018/10/1
Y1 - 2018/10/1
N2 - We propose a simple and quantitative method to evaluate thickness of crosslinked surface layer (tx) for superabsorbent poly(acrylic acid) (PAA) materials using a fluorescent dye of rhodamine B (RhB). The electrostatic attraction between the cationic amine group of dye and the anionic carboxylate group of PAA allows us to measure the fluorescent contrast since the surface-crosslinking causes a significant decrease in concentration of carboxylate group compared to that of inner region. Our method utilizing the distinct adsorption difference of RhB visualizes the crosslinked surface (or shell) layer and successfully demonstrates a direct characterization of tx in a dry state of superabsorbent materials, regardless of irregular particle shape.
AB - We propose a simple and quantitative method to evaluate thickness of crosslinked surface layer (tx) for superabsorbent poly(acrylic acid) (PAA) materials using a fluorescent dye of rhodamine B (RhB). The electrostatic attraction between the cationic amine group of dye and the anionic carboxylate group of PAA allows us to measure the fluorescent contrast since the surface-crosslinking causes a significant decrease in concentration of carboxylate group compared to that of inner region. Our method utilizing the distinct adsorption difference of RhB visualizes the crosslinked surface (or shell) layer and successfully demonstrates a direct characterization of tx in a dry state of superabsorbent materials, regardless of irregular particle shape.
UR - http://www.scopus.com/inward/record.url?scp=85047616307&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85047616307&partnerID=8YFLogxK
U2 - 10.1016/j.matlet.2018.05.079
DO - 10.1016/j.matlet.2018.05.079
M3 - Article
VL - 228
SP - 33
EP - 36
JO - Materials Letters
JF - Materials Letters
SN - 0167-577X
ER -