Mr. Max J. Männel Profile

Max J. Männel

at Leibniz Institute of Polymer Research Dresden

SPIE Involvement:

Author

Publications (2)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 21 February 2020 Presentation + Paper

Solvent-resistant microfluidic devices made from PFHDA resins by micro-stereolithography

Max Männel, Nicolas Hauck, Julian Thiele

Proceedings Volume 11235, 112350H (2020) https://doi.org/10.1117/12.2546060

KEYWORDS: Microfluidics, Printing, 3D printing, Computer aided design, Polymers, Resistance, Absorbance, Polymerization, Lab on a chip, Fluorine

Read Abstract +

Chemically resistant polymer materials are of great interest due to their versatile implementation in a broad range of applications, including the design of robust microfluidic devices. While flow cells, conventionally fabricated by using poly(dimethylsiloxane) (PDMS), are hardly resistant toward organic solvents, fluorinated materials are chemically inert. However, focusing on the latest developments in microfluidic device design via high-resolution additive manufacturing, e.g., based on micro-stereolithography (μSL), only a few resin formulations have been demonstrated suitable for 3D printing chemically resistant polymer objects. Here, we introduce a homemade resin formulation based on 1H,1H,6H,6H-Perfluoro-1,6-hexyl diacrylate (PFHDA) for high-resolution 3D printing utilizing μSL. By investigating the optical dose, the wettability, the resistance toward organic solvents, and the minimal resolution achievable, we fabricate inner structures down to 200 μm. Finally, water-in-oil (W/O) emulsions are generated in a 3D-printed droplet maker with planar microchannel geometry made from the PFHDA-based resin yielding droplets with an average diameter of 271 μm ± 26 μm. The presented material is resistant against commonly used organic solvents including THF, DMF and toluene with a swelling below 1.5% and shows no solvent-induced damage to the micro-printed structure, which makes the PFHDA-based resin a promising base material for several potential applications such as organic synthesis in microreactors.

Proceedings Article | 4 March 2019 Paper

Multifunctional microfluidic devices from tailored photopolymer formulations

Max Männel, Niclas Weigel, Julian Thiele

Proceedings Volume 10875, 1087507 (2019) https://doi.org/10.1117/12.2514798

KEYWORDS: Microfluidics, Printing, Polymers, Polymerization, Additive manufacturing, Computer aided design, 3D printing, Microscopy

Read Abstract +

Here, we demonstrate the additive manufacturing of two key microvalve designs, namely Nordin’s and Quake’s microvalves, based on a formulation consisting of tri(propylene glycol) diacrylate (TPGDA) as a base material, diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide (TPO) as a photoinitiator and Sudan1 as the UV-absorber via micro-stereolithography (μSL). Mechanical measurements of test prints show an average Young’s modulus of 15.7 MPa, which is eight times lower compared to several previous studies on 3D-printed microvalves and micropumps based on poly(ethylene glycol diacrylate) 255 (PEGDA-252). We use a high-resolution Cerafab7500 printer (Lithoz GmbH, Vienna) with a minimal lateral resolution of 10.3 μm to print membrane valves with voxel dimensions down to 60μm. Particularly, we study the effect of different comonomers added to the photopolymer formulation – neopentyl glycol propoxylate (1 PO/OH) diacrylate (NPGPDA), 1,6- hexanediol diacrylate (HDDA) and 2-phenoxyethyl acrylate (POEA) – on the layer thickness, which is identified to be a crucial parameter. 3D-printed valves are tested regarding maximum operating pressure withstanding pressures of up to 5 bar. We show that TPGDA-based resins combine high flexibility, mechanical stability, and sufficient resolution for the future design of flow control units in microfluidics.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years