✦ LIBER ✦

Effect of Hydrophilic Shells on the Formation of Colloidal Crystals by Monodisperse Core-Shell Polymer Microspheres

✍ Scribed by Qingbin Meng; Zhanyong Li; Gang Li; Xiao Xia Zhu

Publisher: John Wiley and Sons
Year: 2007
Tongue: English
Weight: 270 KB
Volume: 28
Category: Article
ISSN: 1022-1336
DOI: 10.1002/marc.200700295

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

We have found that a soft, hydrophilic shell is necessary in the formation of three‐dimensional colloidal crystals by polymeric microspheres prepared by surfactant‐free emulsion copolymerization. The core‐shell microspheres contain a hard, hydrophobic polystyrene core and a soft, hydrophilic shell made of polyacrylamide or poly(acrylic acid) (PAA). Dilution of the particles induced a red shift of the diffraction peak. We have found a pH switching effect for the formation of colloidal crystals by the microspheres with a PAA shell. When the carboxylic‐acid groups are protonated, the colloidal crystals lose their order. The same effect is observed when a poor solvent is added to the colloidal crystals formed by the microspheres with a polyacrylamide shell.

magnified image

📜 SIMILAR VOLUMES

Effect of shell thickness on the tempera

Effect of shell thickness on the temperature-sensitive property of core-shell composite polymer particles

✍ M. Okubo; H. Ahmad 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 502 KB

## SYNOPSIS Core-shell composite polymer particles having temperature-sensitive shell were prepared by seeded emulsion copolymerization of dimethylaminoethyl methacrylate and ethylene glycol dimethacrylate (EGDM) with 0.14 pm-sized polystyrene seed particles according to our previous article. In t

Sub-kilogram-Scale One-Pot Synthesis of

Sub-kilogram-Scale One-Pot Synthesis of Highly Luminescent and Monodisperse Core/Shell Quantum Dots by the Successive Injection of Precursors

✍ J. I. Kim; J.-K. Lee 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 571 KB

Effect of viscosity of shell solution on

Effect of viscosity of shell solution on the content of solid powder as core material in microencapsulation by the drying-in-liquid method

✍ Hiroshi Yokoyama; Liu Mo; Yoshinari Taguchi; Masato Tanaka 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 374 KB 👁 2 views

Synthesis of core-shell molecularly impr

Synthesis of core-shell molecularly imprinted polymer microspheres by precipitation polymerization for the inline molecularly imprinted solid-phase extraction of thiabendazole from citrus fruits and orange juice samples

✍ Francisco Barahona; Esther Turiel; Peter A. G. Cormack; Antonio Martín-Esteban 📂 Article 📅 2011 🏛 John Wiley and Sons 🌐 English ⚖ 240 KB

## Abstract In this work, the synthesis of molecularly imprinted polymer microspheres with narrow particle size distributions and core‐shell morphology by a two‐step precipitation polymerization procedure is described. Polydivinylbenzene (poly DVB‐80) core particles were used as seed particles in t