Current time in Korea 08:30 Jun 19 (Wed) Year 2019 KCS KCS Publications
KCS Publications
My Journal Log In Register
HOME > Search > Browsing(JKCS) > Archives

Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 47, Number 3
JKCSEZ 47(3)
June 20, 2003 

 
Title
Adsorption Thermodynamics of Polyamidoamide Epichlorohydrin Polymer in an Aqueous Fibrous Suspension

섬유 현탁액내 PAE 고분자 흡착의 열역학적 고찰
Author
Sung-Hoon Yoon, Kwang-Suk Joo, Tae-Won Lee, Kun-Han Kim, Byung-Bin Park

윤성훈, 주광석, 이태원, 김건한, 박병민
Keywords
PAE, 제지, 고분자 흡착, 랭뮤어, 엔탈피 , PAE, Papermaking, Polymer Adsorption, Langmuir, Enthalpy
Abstract
본 연구는 섬유 교질-현탁액내 PAE 고분자 전해질의 흡착성향과 Lanumuir 및 Freundlich식 흡착 평형에 대한 열역학적 특성을 규명하기 위하여 수행되었다. 섬유의 계면동전위적 특성은 흐름-전기적 방법의 제타전위 측정에 의해 분석되었고, PAE 고분자 흡착량은 고분자 전해질용액의 PCD 적정을 통해 측정되었다. PAE 고분자 내첨은 지료의 제타전위에 크게 영향을 미쳤으며 내첨 초기에는 제타전위 상승 효과가 크게 나타났지만 시간의 경과와 함께 전하 감쇄현상을 나타내었다. PAE 고분자는 저온 또는 상온에서 준-Langmuir 흡착 거동을 보여주었으나 온도가 증가하면서 Freundlich 지수항(n)이 비례적으로 높아지는 결과를 나타내었다. PAE 고분자의 Gibbs 흡착 자유에너지로부터 산출한 트레인 수(Nseg)는 상온에서 약 7~8의 범위로 나타났고 고분자 고리의 노출반경은 약 215 nm로서 10 ℃ 온도상승에 대해 점차 9%씩 증가하였다. 지료 내 PAE 고분자의 흡착 엔탈피는 -27~-29 kJ/mol이며 저에너지 물리흡착임이 규명되었다.

This study was to examine the thermodynamic features of polyelecrolytic adsorption of polyamidoamine-epichlorohydrin(PAE) in a papermaking wet-end. The PAE adsorption experiments were conducted in a stirred jar containing an aqueous fibrous suspension and evaluated in terms of Langmuir and Freundlich parameters. The electrokinetic property of a stock was examined by measuring the zeta potential of each colloidal suspension. The polyelectrolytic PCD titration was employed to determine the adsorbed amounts of PAE polymer. The zeta potential of a stock, being varied significantly depending upon the addition of PAE polymer, showed initially a sharp increase and later an exponential decay as a function of time . The PAE adsorption exhibited a pseudo-Langmuir adsorption behavior at 20 ℃, whereas its Freundlich power(n) increased in a proportional way at an elevated temperature. The train numbers calculated on the basis of adsorption thermodynamics were 7 to 8. The length of the extended loop of PAE was calculated as 215 nm at 20 ℃ and increased at a rate of 9% at every 10 ℃ rise in temperature. The PAE adsorption was proven to be an exothermic physisorption with the estimated adsorption enthalpy of -27 to -29 kJ/mol.

Page
220 - 0
Full Text
PDF