Effects of water-soluble polymers dissolved in an aqueous secondary fluid on the rheological properties of “capillary” suspensions

IF 2.2 4区工程技术 Q2 MECHANICS

Korea-Australia Rheology Journal Pub Date : 2022-03-21 DOI:10.1007/s13367-022-00027-w

Jeewon Yang, Jieun Kim, Joohyung Lee

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引用次数: 2

Abstract

Ternary colloidal or “capillary” suspensions comprising bulk and secondary fluids (S) and particles have attracted considerable attention in recent years. The addition of a suitable S can readily initiate the transition of a fluid-like pre-mixture into a gel-like capillary suspension. However, the precise control of rheological properties of such suspensions in the gel state is still challenging. In this study, we investigated the effects of the addition of various water-soluble polymers in an aqueous S on the rheological properties of the capillary suspensions. Results suggest that all the investigated systems maintained the gel state. Cellulose-type polymers with high molecular weights increased the sample strength, which was attributed to the gelation and reduced rupture of interparticle capillary bridges. In contrast, the non-cellulose-type polymers decreased the sample strength, which may be attributed to the interparticle repulsion and/or decrease in the capillary force. We believe this study will aid the design of various industrial complex fluids that often contain multiple immiscible fluids and polymeric additives.

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水溶性聚合物溶解在二次水中对“毛细”悬浮液流变性能的影响

三元胶体或“毛细管”悬浮液包括散装和二次流体(S)和颗粒近年来引起了相当大的关注。添加合适的S可以很容易地启动流体状预混合物向凝胶状毛细管悬浮液的转变。然而，在凝胶状态下精确控制这种悬浮液的流变特性仍然具有挑战性。在这项研究中，我们研究了在含水S中添加各种水溶性聚合物对毛细管悬浮液流变特性的影响。结果表明，所研究的体系均保持凝胶状态。高分子量的纤维素型聚合物增加了样品的强度，这是由于凝胶作用和减少了颗粒间毛细管桥的断裂。相反，非纤维素型聚合物降低了样品强度，这可能是由于颗粒间排斥和/或毛细力的减少。我们相信这项研究将有助于设计各种工业复杂流体，通常包含多种不混相流体和聚合物添加剂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Korea-Australia Rheology Journal 工程技术-高分子科学

CiteScore

2.80

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Korea-Australia Rheology Journal is devoted to fundamental and applied research with immediate or potential value in rheology, covering the science of the deformation and flow of materials. Emphases are placed on experimental and numerical advances in the areas of complex fluids. The journal offers insight into characterization and understanding of technologically important materials with a wide range of practical applications.