Mechanical behavior of organo-modified Indian bentonite nanoclay fiber-reinforced plastic nanocomposites

The aim of the research was to examine the influence of organo-modified Indian bentonite （IB） nanoclay dispersed in vinyisster on the mechanical properties of nanoclaylvinylesterlglass nanocomposRes. Nanoclay was organically modified using cationic surfactant hexadecyltrimethylammonium bromide （HDTMA-Br） by cation exchange method and dispersed in vinylester using ultrasonication and twin screw extrusion. XRD of nanoclaylvinylester revealed exfoliaUon at 4 wt.% nanoclay indicating uniform dispersion in the polymer. DSC results showed improvement in glass transition temperature by 22.3% in 4 wt.% nanoclaylvinylester/glass when compared with that of vinylester/glass. Nanoclay/vinylester/glass with 4 wt,% nanoclay showed 29.23%, 23.84% and 60.87% improvement in ultimate tensile strength （UTS）, fiexural strength （FS） and interlaminar shear strength （ILSS） respectively when compared with those of vinylester! glass. The mode of tensile failure examined by SEM showed no agglomeration of nanoclay in 4 wt.% nanoclayNinylester/glass specimens.

球团矿配加两种赤铁矿取代膨润土的可行性研究

为降低膨润土配入量,进一步提高球团矿品位,探索了配加赤铁矿取代膨润土的可行性。结果表明:两种赤铁矿取代膨润土是可行的;印度赤铁矿配入20%可以取代1.3%的膨润土,但焙烧温度需提高40℃,且球闭矿各项指标较好;印度赤铁矿可以全部取代膨润土,此时焙烧温度需提高60℃;宣化当地"红粉"配比不宜超过10%,可部分取代膨润土。