Method for preparing surface-functionalized macro porous micro-clusters is proposed comprising at least the following individual steps in given order:
a) synthesis of dispersed cross-linked polymeric latex primary core particles starting from at least one monomer or oligomer in an emulsion polymerization under starved conditions;
b) synthesis of a shell layer on the surface of the primary core particles to form core-shell particles starting under starved conditions from the same at least one monomer or oligomer as in step a) and in addition to that at least one additional azide monomer;
c) swelling of the core-shell particles with a liquid comprising at least one of the monomers or oligomers as used in a) as well as a polymerization initiator but preferably no azide monomer in particular not the additional azide monomer from step b);
d) formation of agglomerates of the particles by application of shear;
e) polymerization of the agglomerates to form the macro porous micro-clusters;
f) direct or indirect surface-functionalization of the agglomerates by way of Cu-(I)-catalyzed or strain promoted azide-alkyne cycloaddition with the azide introduced in step b).
本发明提出了制备表面功能化大孔径微簇的方法,至少包括以下按给定顺序排列的各个步骤:
a) 以至少一种单体或低聚物为原料,在饥饿条件下进行乳液聚合,合成分散交联聚合胶乳主芯颗粒;
b) 在饥饿条件下,用与步骤 a) 相同的至少一种单体或低聚物,以及至少另外一种
叠氮单体,在原核粒子表面合成壳层,形成核壳粒子;
c) 用一种液体溶胀核壳颗粒,该液体包含 a) 步骤中使用的至少一种单体或低聚物以及聚合
引发剂,但最好不含
叠氮单体,尤其是不含步骤 b) 中的附加
叠氮单体;
d) 施加剪切力使颗粒形成团聚体;
e) 使团聚体聚合,形成大孔微团块;
f) 通过 Cu-(I)催化或应变促进的
叠氮烷烃与步骤 b) 中引入的
叠氮化物进行环加成,使团聚体直接或间接表面功能化。