A novel approach for dispersion palygorskite aggregates into nanorods via adding freezing process into extrusion and homogenization treatment

CORC > 兰州化学物理研究所 > 中国科学院兰州化学物理研究所 > 环境材料与生态化学研究发展中心

	A novel approach for dispersion palygorskite aggregates into nanorods via adding freezing process into extrusion and homogenization treatment
	Xu JX(徐继香)1,2; Wang WB(王文波)1,3 ; Wang AQ(王爱勤)1,3
刊名	Powder Technology
	2013
卷号	249 页码:157-162
关键词	Palygorskite Disaggregation Freezing process Morphology Rotary viscosity
ISSN号	0032-5910
通讯作者	王爱勤
英文摘要	Palygorskite is a natural nanorod with about 20-70 nm in diameter and 1-2 μm in length, but the intrinsic existence. form of palygorskite as aggregates or bundles effaces its nanometer characteristic. In this work, a novel method for effective disaggregation of crystal bundles of palygorskite was developed via freezing assisted extrusion and homogenization process. The effects of freezing process and freezing time on the disaggregation state, micro-structure and properties of treated palygorskite were studied using scanning electron microscopy (SEM), transmission electron microscopy (TEM), infrared spectroscopy (IR), X-ray diffraction (XRD), N₂ adsorption-desorption isotherm (BET), and rotary viscosity measurements. The dispersion of palygorskite depended greatly on freezing time, and a highly dispersed palygorskite nanorods were achieved after freezing for 4 h followed by homogenization at 10 MPa. The treated palygorskite retained its original structure, and the rods were rarely disrupted. The specific surface area of palygorskite enhanced from 163 m²/g to 237 m²/g as the freezing time increased from 0 to 8 h, and the rotary viscosity increased from 152 mPa.s of natural palygorskite to 2682 mPa.s, which was about 2.0 folds of the sample without freezing treatment.
学科主题	环境材料与生态化学
收录类别	SCI
资助信息	the "863" Project of the Ministry of Science and Technology, P. R. China (2013AA031403);Project of Jiangsu Provincial Sci. & Tech. Department (No. BE2012113)
语种	英语
WOS记录号	WOS:000328659400022
公开日期	2013-12-06
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/4552]
专题	兰州化学物理研究所_环境材料与生态化学研究发展中心
作者单位	1.Chinese Acad Sci, Lanzhou Inst Chem Phys, Ctr Xuyi Palygorskite Appl Technol, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Huaiyin Inst Technol, Key Lab Palygorskite Sci & Appl Technol Jiangsu P, Huaian 223003, Peoples R China
推荐引用方式 GB/T 7714	Xu JX,Wang WB,Wang AQ. A novel approach for dispersion palygorskite aggregates into nanorods via adding freezing process into extrusion and homogenization treatment[J]. Powder Technology,2013,249:157-162.
APA	Xu JX,Wang WB,&Wang AQ.(2013).A novel approach for dispersion palygorskite aggregates into nanorods via adding freezing process into extrusion and homogenization treatment.Powder Technology,249,157-162.
MLA	Xu JX,et al."A novel approach for dispersion palygorskite aggregates into nanorods via adding freezing process into extrusion and homogenization treatment".Powder Technology 249(2013):157-162.