Surface roughness analysis and improvement of PMMA-based microfluidic chip chambers by CO2 laser cutting

Huang, Yongguang; Liu, Shibing; Yang, Wei; Yu, Chengjun

doi:10.1016/j.apsusc.2009.09.092

Cited by 84 publications

(42 citation statements)

References 24 publications

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“…The CO 2 lasers are particularly well suited to the cutting of the PMMA. Applications of thermoplastic PMMA have grown considerably in many cases, for example, lenses, light pipes, outdoor signs, light covers, bathroom fittings, skylights, meter covers, baths and toys [11].…”

Section: Introductionmentioning

confidence: 99%

“…The part of the material, which is not converted into a gaseous state, is blown away in the liquid form by the flowing assist gas. The above-described process causes formation of a pit in the cut material and thus the laser beam can penetrate continuously deeper, which results in depth melting of the material, [1,3,[11][12]. The CO 2 lasers are particularly well suited to the cutting of the PMMA.…”

Section: Introductionmentioning

confidence: 99%

“…The subsequent processes, which take place during the cutting of the material, and the effect on the material properties following the focused beam impact, mainly depend on the chemical composition of the material being cut and on the quality of its surface, as well [4,[7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparison of the PMMA mechanical properties after cutting by the laser beam and milling

Nigrovič¹,

Meško²,

Nikolić³

et al. 2018

FME Transaction

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparison of the PMMA mechanical properties after cutting by the laser beam and milling

Nigrovič¹,

Meško²,

Nikolić³

et al. 2018

FME Transaction

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show abstract

“…[4,5] Effect on the final quality of the cut has a gas pressure, where better results are secured with a low frequency. Effects of laser power and the cutting speed are different for polymeric materials compared also J.P. Davim et al [6]. Best workability was PMMA, which showed little HAZ with minimal running off the edge.…”

Section: Laser Cutting Of Polymer Materialsmentioning

confidence: 99%

Parameters Influence of CO2 Laser on Cutting Quality of Polymer Materials

Čep¹,

Malotová²,

Pagáč³

et al. 2016

TransVSBms

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The article deals with evaluating of the resulting surface state of the three plastic materials and identification of suitable conditions for laser cutting with CO 2 tube. As representative were chosen polypropylene, polymethylmethacrylate and polyamide. When cutting these types of materials it could melt eventually their re-sintering. A suitable combination of parameters is possible to achieve of sufficient quality of the cut. The samples were cut at different feed speed and laser power. Then they was compared on the basis of the measured roughness parameters Ra a Rz by using a portable touch roughness Hommel-Etamic W5 and dates was processed according to ČSN EN ISO 4287. Cutting of samples was realized at the Department of Machining, Assembly and Engineering Metrology, VŠB-TUO. AbstraktČlánek se zabývá vyhodnocením výsledného stavu povrchu tří plastických materiálů a vytipování vhodných podmínek pro řezání laserem s CO 2 trubicí. Za představitele byli vybráni poplypropylen, polymetylmetakrylát a polyamid. Při řezání těchto typů materiálů může dojít k roztavení popř. k opětovnému spojení. Vhodnou kombinací parametrů je možno docílit dostatečné kvality řezu. Uvedené vzorky byly nařezány za různých rychlostí posuvu a výkonů laseru. Vzorky byly následně porovnány na základě měřených parametrů drsnosti Ra a Rz s využitím přenosného dotykového drsnoměru Hommel-Etamic W5 a data byla zpracována dle (ČSN EN ISO 4287). Řezání vzorků probíhalo na pracovišti Katedry obrábění, montáže a strojírenské metrologie, VŠB-TU Ostrava.

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“…For example, Lee et al 20 deposited a SiO2 layer along engraved poly-(methylmethacrylate) (PMMA) microchannels to obtain a smoother inner surface while realizing permanent sealing with PDMS assisted by the coated intermediate SiO2 layer. Huang et al 21 preheated PMMA to approximately 70 -90 C during laser processing to reduce the surface roughness. Ogilvie et al 11 suggested a chloroform vapor treatment of micromilled PMMA and a cyclic olefin copolymer (COC) channel to irreversibly bond the microfluidic chip, while simultaneously reducing the channel surface roughness.…”

Section: Introductionmentioning

confidence: 99%

Imprint Molding of a Microfluidic Optical Cell on Thermoplastics with Reduced Surface Roughness for the Detection of Copper Ions

Lee

2016

ANAL. SCI.

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Here, we introduce a simple and facile technique for fabricating microfluidic optical cells by utilizing a micropatterned polymer mold, followed by imprinting on thermoplastic substrates. This process has reduced the surface roughness of the microchannel, making it suitable for microscale optical measurements. The micropatterned polymer mold was fabricated by first micromilling on a poly(methylmethacrylate) (PMMA) substrate, and then transferring the micropattern onto an ultraviolet (UV)-curable optical adhesive. After an anti-adhesion treatment of the polymer mold fabricated using the UV-curable optical adhesive, the polymer mold was used repeatedly for imprinting onto various thermoplastics, such as PMMA, polycarbonate (PC), and poly(ethyleneterephthalate) (PET). The roughness values for the PMMA, PC, and PET microchannels were approximately 11.3, 20.3, and 14.2 nm, respectively, as compared to those obtained by micromilling alone, which were 15.9, 76.8, and 207.5 nm, respectively. Using the imprint-molded thermoplastic optical cell, rhodamine B and copper ions were successfully quantified. The reduced roughness of the microchannel surface resulted in improved sensitivity and reduced noise, paving the way for integration of the detection module so as to realize totally integrated microdevices.

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Surface roughness analysis and improvement of PMMA-based microfluidic chip chambers by CO2 laser cutting

Cited by 84 publications

References 24 publications

Comparison of the PMMA mechanical properties after cutting by the laser beam and milling

Comparison of the PMMA mechanical properties after cutting by the laser beam and milling

Parameters Influence of CO2 Laser on Cutting Quality of Polymer Materials

Imprint Molding of a Microfluidic Optical Cell on Thermoplastics with Reduced Surface Roughness for the Detection of Copper Ions

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