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Wettability-patterning method and designs for pumpless transport and precise manipulation of liquid volumes on and through porous materials

A liquid volume, porous substrate technology, used in chemical instruments and methods, fluid controllers, laboratory containers, etc., can solve problems such as unproven combinations, and achieve the effect of simple manufacturing process and improved delivery rate

Pending Publication Date: 2019-07-02
KIMBERLY-CLARK WORLDWIDE INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While several previous designs have attempted to establish controlled unidirectional liquid transport on the surface of fibrous substrates or through the thickness of porous materials, the combination of these two modes of controlled unidirectional transport has not yet been demonstrated.

Method used

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  • Wettability-patterning method and designs for pumpless transport and precise manipulation of liquid volumes on and through porous materials
  • Wettability-patterning method and designs for pumpless transport and precise manipulation of liquid volumes on and through porous materials
  • Wettability-patterning method and designs for pumpless transport and precise manipulation of liquid volumes on and through porous materials

Examples

Experimental program
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Effect test

Embodiment

[0082] The following contents are provided for the exemplary purpose of facilitating understanding of the present disclosure, and should not be construed as limiting the present disclosure to these examples. Other formulations and substrates may also be used within the scope of this disclosure and the claims set forth below.

[0083] In one specific example, TiO in a matrix of hydrophobic fluoroacrylic polymer (PMC) (20% by weight in water; DuPont, Capstone ST-100) was used by spraying. 2 Filler particles were applied to a porous substrate in the form of 38 gsm high density tissue (HDPT) KLEENEX 50606 brand rigid roll tissue (from Kimberly-Clark) to render the substrate superhydrophobic. Facile patterning techniques that have been previously deployed on solid substrates are applicable to HDPT. Surface preparation consists of two basic steps:

[0084] 1. Spray TiO on the substrate 2 The nanoparticles and PMC were then dried in an oven (Model 10GC; QuincyLab, Inc.) at 80°C fo...

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Abstract

A material for manipulating liquid includes a porous substrate having first and second surfaces; and a wedge-shaped transport element disposed on one of the first and second surfaces, wherein the wedge-shaped transport element has a narrow end and a wide end, the wide end connected to a first reservoir, wherein the wedge-shaped transport element is configured to pass liquid from the narrow end tothe wide end to the first reservoir, regardless of gravity, and wherein the first reservoir is configured to pass liquid away from the substrate in a z-direction opposite from the surface on which a liquid is deposited. The surface on which the wedge-shaped transport element is disposed is one of hydrophobic or superhydrophobic, and the wedge-shaped transport element is one of a) superhydrophilicwhen the first surface is hydrophobic, b) superhydrophilic when the first surface is superhydrophobic, and c) hydrophilic when the first surface is superhydrophobic.

Description

Background technique [0001] Liquid transport using wettable patterned surfaces is a growing field of application in microfluidics. The ease of material fabrication combined with open surface flow holds promise for low-cost microfluidic applications. Tuning material wettability (steric) to control liquid-solid interactions for specific microfluidic tasks is not only relevant for impermeable (rigid and flexible) substrates but also for porous fibrous substrates. Previous studies have demonstrated unidirectional fluid transport using special coating techniques that create wettability gradients along the thickness of fibrous substrates by selectively varying levels of ultraviolet (UV) radiation exposure. The operation of such porous membranes, fabrics or papers with wettability gradients depends on the resistance to permeation through these materials; this resistance comes from the coupled effects of the local geometric angles of adjacent fibers and the solid-liquid contact angle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01L3/00
CPCB01L3/50273B01L2300/0816B01L2300/165B01L2400/0406B01L3/502792B01L2300/166B01L2400/04B01L2300/12B01L2300/0848B01L2300/0861B01L3/00B01L2200/0605
Inventor 于丽莎R·N·道奇C·麦加里迪斯S·查特吉P·S·马哈帕特拉R·刚古力A·易卜拉欣
Owner KIMBERLY-CLARK WORLDWIDE INC
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