Effect of squeeze, homogenization, and freezing treatments on particle diameter and rheological properties of palygorskite

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

	Effect of squeeze, homogenization, and freezing treatments on particle diameter and rheological properties of palygorskite
	Xu JX(徐继香)1,2; Wang WB(王文波)1 ; Wang AQ(王爱勤)1
刊名	Advanced Powder Technology
	2014
卷号	25 期号:3 页码:968-977
关键词	Palygorskite Mechanical treatment Rheological properties Particle size
ISSN号	0921-8831
通讯作者	王爱勤
英文摘要	The natural palygorskite exist as aggregates or bundles via weak electrostatic and van der Waals interactions. A new method for effective disaggregation of bundles was developed via freezing combined with squeeze and homogenization processes. In this work, the effects of squeeze, homogenization, and freezing treatments on particle size and rheological properties of palygorskite were investigated systematically by particle diameter distribution, steady shear, and linear oscillatory measurements. The influences of squeezing times, homogenization pressure, and freezing time on shear stress and shear modulus were studied in detail. The association capacity of rods in the obtained suspensions was discussed according to a power law of the form Y = k_yCⁿ. The correlation among the dispersion of palygorskite, the aspect ratio of the rods, and the rheological properties was discussed. The diameter distribution changed from 4.3 to 3.0 mu m of natural palygorskite to 1.8 mu m of sample squeezed for two times, frozen at -18 degrees C for 4 h, and homogenized at 10 MPa. The suspension with higher shear stress and shear modulus was obtained after squeezed for three times and homogenized at 30 MPa.
学科主题	环境材料与生态化学
收录类别	SCI
资助信息	“863” Project of the Ministry of Science and Technology, PR China (No. 2013AA032003);the Science and Technology Support Project of Jiangsu Provincial Sci. & Tech. Department (No. BE2012113)
语种	英语
WOS记录号	WOS:000337216000023
公开日期	2014-10-17
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/6550]
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, R&D Ctr Xuyi Palygorskite Appl Technol, Lanzhou 730000, Peoples R China 2.Qingdao Univ Sci & Technol, Key Lab Ecochem Engn, Minist Educ, Coll Chem & Mol Engn, Qingdao 266042, Peoples R China
推荐引用方式 GB/T 7714	Xu JX,Wang WB,Wang AQ. Effect of squeeze, homogenization, and freezing treatments on particle diameter and rheological properties of palygorskite[J]. Advanced Powder Technology,2014,25(3):968-977.
APA	Xu JX,Wang WB,&Wang AQ.(2014).Effect of squeeze, homogenization, and freezing treatments on particle diameter and rheological properties of palygorskite.Advanced Powder Technology,25(3),968-977.
MLA	Xu JX,et al."Effect of squeeze, homogenization, and freezing treatments on particle diameter and rheological properties of palygorskite".Advanced Powder Technology 25.3(2014):968-977.