通过在二氧化硅模板上进行表面引发的自缩合乙烯基聚合制备交联聚合物纳米胶囊。

Preparation of crosslinked polymeric nanocapsules by surface-initiated self-condensing vinyl polymerization on silica templates.

作者信息

Mu Bin, Shen Ruoping, Liu Peng

机构信息

State Key Laboratory of Applied Organic Chemistry and Institute of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People's Republic of China.

出版信息

J Nanosci Nanotechnol. 2009 Jan;9(1):484-9. doi: 10.1166/jnn.2009.j001.

DOI:10.1166/jnn.2009.j001

PMID:19441338

Abstract

We developed a process to fabricate crosslinked polymeric nanocapsules with about 10-40 nm hollow cores. These crosslinked polymeric nanocapsules were fabricated via the surface-initiated self-condensing vinyl polymerization (SI-SCVP) of p-chloromethyl styrene (CMS) from initiator modified silica nanoparticles with atom transfer radical polymerization (ATRP) technique. The silica templates were removed by HF etching to produce the crosslinked polymeric nanocapsules after the grafted hyperbranched polymers had been crosslinked. Transmission electron microscopy (TEM) was used to characterize the products and to demonstrate that the polymeric nanospheres were hollow. FTIR spectroscopy showed that the silica templates were completely removed by etching.

摘要

我们开发了一种制备具有约10 - 40纳米中空核的交联聚合物纳米胶囊的方法。这些交联聚合物纳米胶囊是通过对氯甲基苯乙烯（CMS）在引发剂修饰的二氧化硅纳米颗粒上进行表面引发的自缩合乙烯基聚合（SI-SCVP），并采用原子转移自由基聚合（ATRP）技术制备而成的。在接枝的超支化聚合物交联后，通过氢氟酸蚀刻去除二氧化硅模板，从而得到交联聚合物纳米胶囊。使用透射电子显微镜（TEM）对产物进行表征，并证明聚合物纳米球是中空的。傅里叶变换红外光谱（FTIR）显示二氧化硅模板通过蚀刻被完全去除。