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Dominant influence of the terminal molecule of PNIPA chain on wettability

Poly(N-isopropylacrylamide) (PNIPA) brushes on silicon substrate was constructed and molecular weight and polydispersity index was controlled precisely. Molecular behavior of the PNIPA grafted surface was observed by using captive bubble contact angle method. A very interesting phenomenon of high de...

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Main Authors: Nurul Huda,, Mohd Rashid,, Sultana, Nahida
Format: Article
Language:English
Published: Penerbit Universiti Kebangsaan Malaysia 2017
Online Access:http://journalarticle.ukm.my/10684/1/16%20Nurul%20Huda.pdf
http://journalarticle.ukm.my/10684/
http://www.ukm.my/jsm/english_journals/vol46num2_2017/contentsVol46num2_2017.html
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spelling my-ukm.journal.106842017-09-20T09:14:09Z http://journalarticle.ukm.my/10684/ Dominant influence of the terminal molecule of PNIPA chain on wettability Nurul Huda, Mohd Rashid, Sultana, Nahida Poly(N-isopropylacrylamide) (PNIPA) brushes on silicon substrate was constructed and molecular weight and polydispersity index was controlled precisely. Molecular behavior of the PNIPA grafted surface was observed by using captive bubble contact angle method. A very interesting phenomenon of high density PNIPA grafted membrane with a chloride terminal molecule was observed. The contact angle of high density PNIPA-Cl increased sharply while the temperature rises above 32oC. But in the case of PNIPA gel surface the contact angle result decreases sharply while the temperature reaches above lower critical solution temperature (LCST). In order to identify the reason behind this abnormal behavior of PNIPA-Cl grafted membrane, the terminal chloride molecule of PNIPA chain was modified to less electronegative azide (-N3) as well as carboxylic acid (-COOH). Finally it was found that terminal molecule of high density PNIPA grafted membrane has a great influences on the wettability change of PNIPA membrane in water by changing the temperature. Penerbit Universiti Kebangsaan Malaysia 2017-02 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/10684/1/16%20Nurul%20Huda.pdf Nurul Huda, and Mohd Rashid, and Sultana, Nahida (2017) Dominant influence of the terminal molecule of PNIPA chain on wettability. Sains Malaysiana, 46 (2). pp. 309-315. ISSN 0126-6039 http://www.ukm.my/jsm/english_journals/vol46num2_2017/contentsVol46num2_2017.html
institution Universiti Kebangsaan Malaysia
building Perpustakaan Tun Sri Lanang Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Kebangsaan Malaysia
content_source UKM Journal Article Repository
url_provider http://journalarticle.ukm.my/
language English
description Poly(N-isopropylacrylamide) (PNIPA) brushes on silicon substrate was constructed and molecular weight and polydispersity index was controlled precisely. Molecular behavior of the PNIPA grafted surface was observed by using captive bubble contact angle method. A very interesting phenomenon of high density PNIPA grafted membrane with a chloride terminal molecule was observed. The contact angle of high density PNIPA-Cl increased sharply while the temperature rises above 32oC. But in the case of PNIPA gel surface the contact angle result decreases sharply while the temperature reaches above lower critical solution temperature (LCST). In order to identify the reason behind this abnormal behavior of PNIPA-Cl grafted membrane, the terminal chloride molecule of PNIPA chain was modified to less electronegative azide (-N3) as well as carboxylic acid (-COOH). Finally it was found that terminal molecule of high density PNIPA grafted membrane has a great influences on the wettability change of PNIPA membrane in water by changing the temperature.
format Article
author Nurul Huda,
Mohd Rashid,
Sultana, Nahida
spellingShingle Nurul Huda,
Mohd Rashid,
Sultana, Nahida
Dominant influence of the terminal molecule of PNIPA chain on wettability
author_facet Nurul Huda,
Mohd Rashid,
Sultana, Nahida
author_sort Nurul Huda,
title Dominant influence of the terminal molecule of PNIPA chain on wettability
title_short Dominant influence of the terminal molecule of PNIPA chain on wettability
title_full Dominant influence of the terminal molecule of PNIPA chain on wettability
title_fullStr Dominant influence of the terminal molecule of PNIPA chain on wettability
title_full_unstemmed Dominant influence of the terminal molecule of PNIPA chain on wettability
title_sort dominant influence of the terminal molecule of pnipa chain on wettability
publisher Penerbit Universiti Kebangsaan Malaysia
publishDate 2017
url http://journalarticle.ukm.my/10684/1/16%20Nurul%20Huda.pdf
http://journalarticle.ukm.my/10684/
http://www.ukm.my/jsm/english_journals/vol46num2_2017/contentsVol46num2_2017.html
_version_ 1643738218063986688
score 13.211869

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