Hollow thermoresponsive microgels

被引：130

作者：

Nayak, S ^{[1
]}

Gan, DJ ^{[1
]}

Serpe, MJ ^{[1
]}

Lyon, LA ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA

来源：

SMALL | 2005年 / 1卷 / 04期

关键词：

core-shell materials; degradation; nanotechnology; polymers; thermoresponsive;

D O I：

10.1002/smll.200400089

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Thermoresponsive poly (N-isopropyl acrylamide) (pNIPAm) microgels possessing a hollow structure have been synthesized from core-shell nanoparticles upon oxidation of the particle core, followed by removal of the produced polymer segments by centrifugation. N,N'-(1,2-dihydroxy-ethylene) bisacrylamide (DHEA) is used as a cross-linker for preparing the degradable core, whereas N,N'-methylenebis(acrylamide) (BIS) is used as a cross-linker to add a nondegradable pNIPAm shell. Addition of NaIO4 to a suspension of these particles in water leads to controlled degradation of the particle core by cleavage of the 1,2-glycol bond in DHEA. Fluorescence spectroscopy, UV/Vis spectroscopy, and photon correlation spectroscopy are used to characterize the hollow particles produced.

引用

页码：416 / 421

页数：6

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