Poly(vinylamine) microgels: pH-responsive particles with high primary amine contents
Poly(vinylamine) microgels: pH-responsive particles with high primary amine contents
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聚(乙烯胺)微凝胶:具有高伯胺含量的 pH 响应性颗粒
DOI:
10.1039/c3sm27728c
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发表时间:
2013
期刊:
影响因子:
3.4
通讯作者:
Thaiboonrod S
中科院分区:
文献类型:
--
作者:
Thaiboonrod S
pH-responsive microgels are crosslinked polymer colloid particles that swell when the pH approaches the pKa of the polybase or polyacid chains. Poly(vinylamine) (PVAM) has the highest primary amine content of all amine-containing polymers. Despite much effort the preparation of colloidally stable PVAM microgels is still elusive. Here, we introduce a simple and scalable, two-step method for preparation of pH-responsive PVAM microgels. First, non-aqueous dispersion (NAD) polymerization was used to prepare new monodisperse water-swellable poly(N-vinylformamide-co-2-(N-vinylformamido)ethyl ether microgels (PNVF-xNVEE). Here, x is the mol% of the alkali-stable crosslinker (NVEE) used. Alkali-hydrolysis of the PNVF-xNVEE microgels in water gave colloidally stable poly(vinylamine-co-bis(ethyl vinylamine)ether) (PVAM-xBEVAME) microgel dispersions. SEM images showed that both the PNVF-9NVEE and PVAM-9BEVAME microgel particles had cluster-like morphologies. The PVAM-xBEVAME particles were positively charged at pH values less than 12. The hydrodynamic diameters and electrophoretic mobilities increased strongly as the pH decreased. In order to demonstrate that primary amines could be used as chemical handles for conjugation, pyrene carboxylic acid was coupled using N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide (EDC) chemistry and its presence confirmed by fluorescence microscopy. Because this new family of colloidally stable microgels has very high primary amine contents and was prepared by a scalable synthetic method there should be potential applications in a wide range of areas from surface coatings and new hybrid particles to delivery.
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DOI:
10.1002/pola.26401
发表时间:
2013
期刊:
Journal of Polymer Science Part A
影响因子:
--
作者:
Tiffany C. Suekama;V. Aziz;Z. Mohammadi;C. Berkland;S. Gehrke
通讯作者:
S. Gehrke
影响因子:
2.4
作者:
P. Bradna;P. Štern;O. Quadrat;J. Šnupárek
通讯作者:
J. Šnupárek
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
Chuanwei Miao;Andy Chen;R. Pelton
通讯作者:
R. Pelton
DOI:
10.1039/ft9969203385
发表时间:
1996-09-21
期刊:
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS
影响因子:
--
作者:
Saunders, BR;Vincent, B
通讯作者:
Vincent, B
DOI:
--
发表时间:
1994
期刊:
影响因子:
--
作者:
Ki;M. Winnik;T. Jao
通讯作者:
T. Jao