非金属矿
非金屬礦
비금속광
NON-METALLIC MINES
2013年
1期
5-7
,共3页
许晨红%王卫军%金叶玲%陈静*
許晨紅%王衛軍%金葉玲%陳靜*
허신홍%왕위군%금협령%진정*
溶剂%膨润土%插层%微纳米化
溶劑%膨潤土%插層%微納米化
용제%팽윤토%삽층%미납미화
solvent%bentonite%intercalation%mico-nano structure
以粒径分布、SEM 和 XRD 分析为主要表征方法,从片层疏离程度和团聚体颗粒大小这两个方面综合评价水、异丙醇和二甲苯等6种溶剂对膨润土微纳米化的影响.实验表明,质量分数对水相膨润土的粒度分布影响显著,膨润土质量分数从5%下降到0.5%时,其最大粒径分布从4310 nm 快速下降到712 nm,但即使质量分数低至0.1%,膨润土仍难以达到单片层的理想分布.不同溶剂对膨润土分散作用差别较大,水分散的膨润土颗粒结构致密,片层间隙不明显;乙醇、二甲苯、丙酮以及异丙醇分散的膨润土颗粒粒径均一,分别集中在380 nm、390 nm、530 nm 和650 nm,且颗粒片层边缘剥离,片层间距明显,颗粒疏松;小角度 XRD 分析也进一步证明乙醇和异丙醇对膨润土有一定的插层作用.乙醇、二甲苯、丙酮及异丙醇对膨润土会产生明显的微纳米化效应.
以粒徑分佈、SEM 和 XRD 分析為主要錶徵方法,從片層疏離程度和糰聚體顆粒大小這兩箇方麵綜閤評價水、異丙醇和二甲苯等6種溶劑對膨潤土微納米化的影響.實驗錶明,質量分數對水相膨潤土的粒度分佈影響顯著,膨潤土質量分數從5%下降到0.5%時,其最大粒徑分佈從4310 nm 快速下降到712 nm,但即使質量分數低至0.1%,膨潤土仍難以達到單片層的理想分佈.不同溶劑對膨潤土分散作用差彆較大,水分散的膨潤土顆粒結構緻密,片層間隙不明顯;乙醇、二甲苯、丙酮以及異丙醇分散的膨潤土顆粒粒徑均一,分彆集中在380 nm、390 nm、530 nm 和650 nm,且顆粒片層邊緣剝離,片層間距明顯,顆粒疏鬆;小角度 XRD 分析也進一步證明乙醇和異丙醇對膨潤土有一定的插層作用.乙醇、二甲苯、丙酮及異丙醇對膨潤土會產生明顯的微納米化效應.
이립경분포、SEM 화 XRD 분석위주요표정방법,종편층소리정도화단취체과립대소저량개방면종합평개수、이병순화이갑분등6충용제대팽윤토미납미화적영향.실험표명,질량분수대수상팽윤토적립도분포영향현저,팽윤토질량분수종5%하강도0.5%시,기최대립경분포종4310 nm 쾌속하강도712 nm,단즉사질량분수저지0.1%,팽윤토잉난이체도단편층적이상분포.불동용제대팽윤토분산작용차별교대,수분산적팽윤토과립결구치밀,편층간극불명현;을순、이갑분、병동이급이병순분산적팽윤토과립립경균일,분별집중재380 nm、390 nm、530 nm 화650 nm,차과립편층변연박리,편층간거명현,과립소송;소각도 XRD 분석야진일보증명을순화이병순대팽윤토유일정적삽층작용.을순、이갑분、병동급이병순대팽윤토회산생명현적미납미화효응.
This study gives a comprehensive research on the effect of solvents on the bentonite nanoparticles, which is based on the sparse extension of sheets and the sizes of agglomerated particles. The characterization methods were mainly carried out by a Malvern Zetasizer, a scanning electronmicroscope and X-ray diffraction. The results shows that the solution dosage significantly infects the distribution of bentonite particle size. When the dosage decreases from 5% to 0.5%, the most particle size distribution reduces from 4310 nm to 712 nm. A deal solution in which bentonite is dispersed into single-layer sheet could not achieve at the dosage of 0.1%. So bentonite nanoparticles can not be got by decreasing of solution dosage. The dispersion behabvior of bentonit in different solvents is widely different, the particles of bentonite in ethanol, dimethylbenzene, acetone and isopropanol are approximately 380 nm, 390 nm, 530 nm, 650 nm size respectively with narrow distribution range. The particles of bentonite are loose and the interlayer space are clearly observed other than bentonite in water. The intercalation impact of bentonite by ethanol and isopropanol is proved with XRD. In a word, the particles of bentonite could be disperated into mico-nano scale by ethanol, dimethylbenzene, acetone and isopropanol.
