Studies of internal gelation for the production of microspheres: Sonication assisted gelation

被引：8

作者：

Gangar, B. V. ^{[1
]}

Nagarajan, K. ^{[2
]}

Krishnan, R. V. ^{[2
]}

Pandit, A. B. ^{[1
]}

机构：

[1] Inst Chem Technol, Dept Chem Engn, Bombay 400019, Maharashtra, India

[2] Indira Gandhi Ctr Atom Res, Div Fuel Chem, Kalpakkam 603102, Tamil Nadu, India

来源：

ULTRASONICS SONOCHEMISTRY | 2011年 / 18卷 / 01期

关键词：

Internal gelation; MOX; Sonication; FTIR; ULTRASOUND;

D O I：

10.1016/j.ultsonch.2010.05.015

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Internal gelation studies are carried out with mixed oxides of uranium and plutonium (MOX) and HMUR (i.e. mixture of hexamethylene tetramine (HMTA) and urea in 1:1 proportion). It is necessary to find surrogate of MOX for the detailed experimental work. Hence, the studies have been carried out with aluminium nitrate and magnesium nitrate. Important parameters of gelation such as temperature and concentration of precursors and the effect of sonication and drying on the gelled particles have been studied using these nitrates and HMUR. It has been found that micromixing (sonication) provides narrow and compact size distribution as compared to macromixing (using magnetic stirrer) and temperature of the precursors does not affect the size distribution of the gelled particles. The effect of drying has been studied using IR (infrared) dryer and oven dryer and it was found that IR drying augments the performance as compared to oven drying. Depending on the solubility of the gel in water and its appearance (as pasty mass which is similar to uranyl nitrate gel) aluminium nitrate is chosen as an appropriate surrogate for MOX. FTIR studies have been carried out for characterization of the gel. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：250 / 257

页数：8

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