Relationship between the volume phase transition and the surface area of poly (N-isopropylacrylamide) and poly (N-isopropylacrylamide-co-sodium methacrylate) hydrogels

Y. A. Han; J. H. Choi; D. J. Park; B. C. Ji

doi:10.1016/S0142-9418(02)00028-4

Relationship between the volume phase transition and the surface area of poly (N-isopropylacrylamide) and poly (N-isopropylacrylamide-co-sodium methacrylate) hydrogels

Y. A. Han, J. H. Choi, D. J. Park, B. C. Ji

Department of Biofibers and Biomaterials Science

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

The volume phase transition of poly(N-isopropylacrylamide) (PNIPAAm) and poly(N-isopropylacrylamide-co-sodium methacrylate) (P(NIPAAm-co-SMA)) hydrogels was investigated with consideration of the pore characteristics. The volume phase transition temperature of the hydrogel increased by incorporating sodium methacrylate (SMA). Based on the BET equation, the surface area was evaluated by a gas adsorption method. The surface area of PNIPAAm and P(NIPAAm-co-SMA) hydrogels decreased with increasing temperature, resulting from the fact that the depth and the size of pores decreased significantly in the course of the volume phase transition. Hence, it is suggested that the change of surface area has a close relationship with the volume phase transition of PNIPAAm and P(NIPAAm-co-SMA) hydrogels.

Original language	English
Pages (from-to)	913-917
Number of pages	5
Journal	Polymer Testing
Volume	21
Issue number	8
DOIs	https://doi.org/10.1016/S0142-9418(02)00028-4
State	Published - 2002

Keywords

Hydrogel
P(NIPAAm-co-SMA)
PNIPAAm
Surface area
Volume phase transition

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10.1016/S0142-9418(02)00028-4

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@article{7971e6f8ea1042e696edf4a0e894dde9,

title = "Relationship between the volume phase transition and the surface area of poly (N-isopropylacrylamide) and poly (N-isopropylacrylamide-co-sodium methacrylate) hydrogels",

abstract = "The volume phase transition of poly(N-isopropylacrylamide) (PNIPAAm) and poly(N-isopropylacrylamide-co-sodium methacrylate) (P(NIPAAm-co-SMA)) hydrogels was investigated with consideration of the pore characteristics. The volume phase transition temperature of the hydrogel increased by incorporating sodium methacrylate (SMA). Based on the BET equation, the surface area was evaluated by a gas adsorption method. The surface area of PNIPAAm and P(NIPAAm-co-SMA) hydrogels decreased with increasing temperature, resulting from the fact that the depth and the size of pores decreased significantly in the course of the volume phase transition. Hence, it is suggested that the change of surface area has a close relationship with the volume phase transition of PNIPAAm and P(NIPAAm-co-SMA) hydrogels.",

keywords = "Hydrogel, P(NIPAAm-co-SMA), PNIPAAm, Surface area, Volume phase transition",

author = "Han, {Y. A.} and Choi, {J. H.} and Park, {D. J.} and Ji, {B. C.}",

year = "2002",

doi = "10.1016/S0142-9418(02)00028-4",

language = "English",

volume = "21",

pages = "913--917",

journal = "Polymer Testing",

issn = "0142-9418",

publisher = "Elsevier Ltd.",

number = "8",

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TY - JOUR

T1 - Relationship between the volume phase transition and the surface area of poly (N-isopropylacrylamide) and poly (N-isopropylacrylamide-co-sodium methacrylate) hydrogels

AU - Han, Y. A.

AU - Choi, J. H.

AU - Park, D. J.

AU - Ji, B. C.

PY - 2002

Y1 - 2002

N2 - The volume phase transition of poly(N-isopropylacrylamide) (PNIPAAm) and poly(N-isopropylacrylamide-co-sodium methacrylate) (P(NIPAAm-co-SMA)) hydrogels was investigated with consideration of the pore characteristics. The volume phase transition temperature of the hydrogel increased by incorporating sodium methacrylate (SMA). Based on the BET equation, the surface area was evaluated by a gas adsorption method. The surface area of PNIPAAm and P(NIPAAm-co-SMA) hydrogels decreased with increasing temperature, resulting from the fact that the depth and the size of pores decreased significantly in the course of the volume phase transition. Hence, it is suggested that the change of surface area has a close relationship with the volume phase transition of PNIPAAm and P(NIPAAm-co-SMA) hydrogels.

AB - The volume phase transition of poly(N-isopropylacrylamide) (PNIPAAm) and poly(N-isopropylacrylamide-co-sodium methacrylate) (P(NIPAAm-co-SMA)) hydrogels was investigated with consideration of the pore characteristics. The volume phase transition temperature of the hydrogel increased by incorporating sodium methacrylate (SMA). Based on the BET equation, the surface area was evaluated by a gas adsorption method. The surface area of PNIPAAm and P(NIPAAm-co-SMA) hydrogels decreased with increasing temperature, resulting from the fact that the depth and the size of pores decreased significantly in the course of the volume phase transition. Hence, it is suggested that the change of surface area has a close relationship with the volume phase transition of PNIPAAm and P(NIPAAm-co-SMA) hydrogels.

KW - Hydrogel

KW - P(NIPAAm-co-SMA)

KW - PNIPAAm

KW - Surface area

KW - Volume phase transition

UR - http://www.scopus.com/inward/record.url?scp=0036068804&partnerID=8YFLogxK

U2 - 10.1016/S0142-9418(02)00028-4

DO - 10.1016/S0142-9418(02)00028-4

M3 - Article

AN - SCOPUS:0036068804

SN - 0142-9418

VL - 21

SP - 913

EP - 917

JO - Polymer Testing

JF - Polymer Testing

IS - 8

ER -

Relationship between the volume phase transition and the surface area of poly (N-isopropylacrylamide) and poly (N-isopropylacrylamide-co-sodium methacrylate) hydrogels

Abstract

Keywords

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