Nanoscale hybrid silica/polymer Janus particles with a double-responsive hemicorona
作者:Thomas M. Ruhland、Holly S. McKenzie、Thomas S. Skelhon、Stefan A.F. Bon、Andreas Walther、Axel H.E. Müller
DOI:10.1016/j.polymer.2015.10.022
日期:2015.11
radical polymerization (ATRP) in a “grafting from” approach. In a first step, poly(vinyl acetate) (PVAc) latex particles are prepared via Pickering emulsion polymerization. Colloidal stability is provided by 30 nm silica nanoparticles that adhere to the surface of the growing polymerparticles. This results in polymer latexes which are armored with a layer of tightly immobilized nanoparticles, one side
Building Congested Ketone: Substituted Hantzsch Ester and Nitrile as Alkylation Reagents in Photoredox Catalysis
作者:Wenxin Chen、Zheng Liu、Jiaqi Tian、Jin Li、Jing Ma、Xu Cheng、Guigen Li
DOI:10.1021/jacs.6b06379
日期:2016.9.28
For the first time, 4-alkyl Hantzsch esters were used to construct molecules with all-carbon quaternary centers by visible light-induced photoredox catalysis via transfer alkylation. Up to a 1500 h(-1) turnover frequency was achieved in this reaction. Reactions of 4-alkyl Hantzsch nitriles as tertiary radical donors joined two contiguous all-carbon quaternary centers intermolecularly, and this chemistry
Method for separating an organic phase from an electrolyte-containing aqueous and organic phase
申请人:Meyer Helmut
公开号:US08354028B2
公开(公告)日:2013-01-15
A method for separating electrolyte-containing water from an organic phase by means of permeation on a hydrophobic separating means. The permeated organic solution is substantially depleted in water and the retained water is enriched with electrolytes.
Nanometer-controlled polymeric thin films that resist adsorption of biological molecules and cells
申请人:——
公开号:US20040191538A1
公开(公告)日:2004-09-30
This invention relates to a process for growing thin films of polyethylene glycol alkyl acrylate (PEGAA) on a moiety accepting surface of a substrate using Surface Atom Transfer Radical Polymerization (SATRP). This invention also relates to a process for producing thin PEGAA films having specific surface functionalities, a thickness ranging from about 0.5 nm to about 5000 nm, and a PEGAA chain density ranging from 0.1 to 100% surface coverage. This invention further relates to articles coated with such films, wherein the coated articles resist adhesion of biological molecules and cells, as well as, to uses for the coated articles.