Polyethylene glycol coating for hydrophilicity enhancement of polydimethylsiloxane self-driven microfluidic chip

Long, Hanling; Lai, Chien‐Chih; Chung, Chen-Kuei

doi:10.1016/j.surfcoat.2016.12.059

Cited by 44 publications

(34 citation statements)

References 16 publications

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“…But the samples did not loose their hydrophilicity even after several months which makes them superior to optimized functional plasma polymer films [ 88 ]. Other groups using different methods to prepare samples equipped with PEG also reported contact angles staying below 50°–70° after storage periods of several weeks [ 89 , 90 ]. However, WCAs already started to increase towards those values after several hours or days.…”

Section: Discussionmentioning

confidence: 99%

Plasma Processing of Low Vapor Pressure Liquids to Generate Functional Surfaces

et al. 2020

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The concept of depositing solid films on low-vapor pressure liquids is introduced and developed into a top-down approach to functionalize surfaces by attaching liquid polyethylene glycol (PEG). Solid-liquid gradients were formed by low-pressure plasma treatment yielding cross-linking and/or deposition of a plasma polymer film subsequently bound to a flexible polydimethylsiloxane (PDMS) backing. The analysis via optical transmission spectroscopy (OTS), optical, confocal laser scanning (CLSM) and scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) as well as by water contact angle (WCA) measurements revealed correlations between optical appearance, chemical composition and surface properties of the resulting water absorbing, covalently bound PEG-functionalized surfaces. Requirements for plasma polymer film deposition on low-vapor pressure liquids and effective surface functionalization are defined. Namely, the thickness of the liquid PEG substrate was a crucial parameter for successful film growth and covalent attachment of PEG. The presented method is a practicable approach for the production of functional surfaces featuring long-lasting strong hydrophilic properties, making them predestined for non-fouling or low-friction applications.

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Section: Discussionmentioning

confidence: 99%

Plasma Processing of Low Vapor Pressure Liquids to Generate Functional Surfaces

et al. 2020

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“…The PDMS coating irreversibly changed from hydrophobic to superhydrophilic surface after surface modification and incorporating with solid nanoparticles. Firstly, the chemical composition of polymer-based glycol such as polypropylene glycol or polyethylene glycol plays a significant role in enhancing the hydrophilicity of the PDMS surface [30,35]. Secondly, the WCA of PDMS surface is further reduced by incorporating with hydrophilic micro-and nano-TiO 2 particles [34].…”

Section: Resultsmentioning

confidence: 99%

Superhydrophilic Smart Coating for Self-Cleaning Application on Glass Substrate

Syafiq

Vengadaesvaran

Pandey

et al. 2018

Journal of Nanomaterials

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In general, superhydrophilic coating on glass substrate possesses water contact angle (WCA) below 10° and contains high self-cleaning properties in outdoor environment as compared to noncoated glass substrate panels. In this study, the superhydrophilic coating behavior on glass substrate has been developed. The micro- and nanosized titanium dioxide (TiO2) particles have been utilized to improve the surface roughness, and the polypropylene glycol (PPG) has been utilized to increase the surface energy of glass substrates. The wettability of coating surface shows the coating possess water contact angle (WCA) as low as 5° and suddenly reduce to 0° after 10 s. Superhydrophilic coated glass clearly shows excellent dirt repellent against dilute ketchup solution due to the absence of dirt streak on the glass surface. Meanwhile, the dirt streak is present on the bare glass surface indicating its weak self-cleaning property. The developed superhydrophilic coating on glass substrate was also found to have great antifog property compared to the bare glass substrate. Superhydrophilic surfaces have showed free tiny droplet even at 130°C of hot boiling bath for 10 min and completely dry after 1 min. The superhydrophilic coating surfaces have demonstrated free water streak after impacting with harsh water spraying for 5 min confirming that the superhydrophilic coating on glass substrate is antiwater streak.

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“…PMMA has the narrowest range of chemical resistance and the highest Young’s modulus [ 60 ]. All these polymers are hydrophobic; however, if hydrophilic channels are desired there are various treatments that can be performed on the microfluidic device that can render the channels hydrophilic [ 62 , 63 ]. Additionally, increasing the molecular weight of these polymers enhances the chemical resistivity of the polymer but makes machining more difficult.…”

Section: Materials Used In the Creation Of Ionp-producing Microflumentioning

confidence: 99%

Microfluidic Synthesis of Iron Oxide Nanoparticles

et al. 2020

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Research efforts into the production and application of iron oxide nanoparticles (IONPs) in recent decades have shown IONPs to be promising for a range of biomedical applications. Many synthesis techniques have been developed to produce high-quality IONPs that are safe for in vivo environments while also being able to perform useful biological functions. Among them, coprecipitation is the most commonly used method but has several limitations such as polydisperse IONPs, long synthesis times, and batch-to-batch variations. Recent efforts at addressing these limitations have led to the development of microfluidic devices that can make IONPs of much-improved quality. Here, we review recent advances in the development of microfluidic devices for the synthesis of IONPs by coprecipitation. We discuss the main architectures used in microfluidic device design and highlight the most prominent manufacturing methods and materials used to construct these microfluidic devices. Finally, we discuss the benefits that microfluidics can offer to the coprecipitation synthesis process including the ability to better control various synthesis parameters and produce IONPs with high production rates.

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Polyethylene glycol coating for hydrophilicity enhancement of polydimethylsiloxane self-driven microfluidic chip

Cited by 44 publications

References 16 publications

Plasma Processing of Low Vapor Pressure Liquids to Generate Functional Surfaces

Plasma Processing of Low Vapor Pressure Liquids to Generate Functional Surfaces

Superhydrophilic Smart Coating for Self-Cleaning Application on Glass Substrate

Microfluidic Synthesis of Iron Oxide Nanoparticles

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