Porous silica spheres in macroporous structures and on nanofibres

被引：9

作者：

Ahmed, Adham ^{[1
]}

Clowes, Rob ^{[1
]}

Willneff, Elizabeth ^{[1
]}

Myers, Peter ^{[1
]}

Zhang, Haifei ^{[1
]}

机构：

[1] Univ Liverpool, Dept Chem, Liverpool L69 7ZD, Merseyside, England

来源：

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES | 2010年 / 368卷 / 1927期

关键词：

porous silica nanospheres; emulsion-templated porous polymers; polymer nanofibres; Stober synthesis; INTERNAL PHASE EMULSIONS; MESOPOROUS SILICA; POLYMER; MONOLITHS; NANOPARTICLES; SURFACTANT; BEADS; SIZE; GENERATION; SCAFFOLDS;

D O I：

10.1098/rsta.2010.0136

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

070301 [无机化学]; 070403 [天体物理学]; 070507 [自然资源与国土空间规划学]; 090105 [作物生产系统与生态工程];

摘要：

Porous nanospheres have a wide range of applications such as in catalysis, separation and controlled delivery. Among these nanospheres, syntheses and applications of porous silica nanospheres have been investigated extensively. Uniform porous silica nanospheres can be synthesized using a modified Stober method. In the present study, porous silica spheres were prepared in the pre-formed emulsion-templated porous polyacrylamide (PAM). A hierarchical hybrid structure of mesoporous silica spheres was formed in the highly interconnected macroporous polymer. The polymer scaffold could be removed by calcination with porous silica spheres and the macroporous structures retained. This resulted from the close packing or aggregation of small silica nanospheres in the pores and on the surface of pores of PAM. The modified Stober synthesis was further carried out in pre-formed polymer nanofibres (chitosan and sodium carboxymethyl cellulose). The structure of porous silica spheres on nanofibres was produced in the presence of the polymer or composite fibres. The corresponding inorganic structures were successfully obtained after calcination. The hierarchical structures of porous nanospheres within macroporous structures or on nanofibres are of potential interest to researchers in nanomaterials, porous polymers, supported catalysis and controlled delivery.

引用

页码：4351 / 4370

页数：20

共 46 条

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