The research of UV curing injection molding

Xie, Pengcheng; Chang, Le; Song, Le Xin; Cai, Tianze; Ding, Yong; Yang, Weimin

doi:10.1063/1.4918480

Cited by 3 publications

(3 citation statements)

References 9 publications

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“…We have focused on OSTE material particularly due to its bonding properties. Contrary to PDMS, OSTE fabrication relies on UV curing and the emerging reaction injection molding process [ 66 , 67 ]. Furthermore, there have been examples of simple microfluidic structure reaction injection molding [ 35 ].…”

Section: Discussionmentioning

confidence: 99%

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Lung on a Chip Development from Off-Stoichiometry Thiol–Ene Polymer

et al. 2021

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Current in vitro models have significant limitations for new respiratory disease research and rapid drug repurposing. Lung on a chip (LOAC) technology offers a potential solution to these problems. However, these devices typically are fabricated from polydimethylsiloxane (PDMS), which has small hydrophobic molecule absorption, which hinders the application of this technology in drug repurposing for respiratory diseases. Off-stoichiometry thiol–ene (OSTE) is a promising alternative material class to PDMS. Therefore, this study aimed to test OSTE as an alternative material for LOAC prototype development and compare it to PDMS. We tested OSTE material for light transmission, small molecule absorption, inhibition of enzymatic reactions, membrane particle, and fluorescent dye absorption. Next, we microfabricated LOAC devices from PDMS and OSTE, functionalized with human umbilical vein endothelial cell (HUVEC) and A549 cell lines, and analyzed them with immunofluorescence. We demonstrated that compared to PDMS, OSTE has similar absorption of membrane particles and effect on enzymatic reactions, significantly lower small molecule absorption, and lower light transmission. Consequently, the immunofluorescence of OSTE LOAC was significantly impaired by OSTE optical properties. In conclusion, OSTE is a promising material for LOAC, but optical issues should be addressed in future LOAC prototypes to benefit from the material properties.

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Section: Discussionmentioning

confidence: 99%

“…In both processes, the temperature limiting factor is membrane material used in OOC devices [ 68 ]. Therefore, it is feasible to assume that OSTE could be utilized for the volume manufacturing process of LOAC devices through the use of reaction injection molding [ 67 ].…”

Section: Discussionmentioning

confidence: 99%

Lung on a Chip Development from Off-Stoichiometry Thiol–Ene Polymer

et al. 2021

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“…16,17 However, the precision of printed parts is low despite the low cost of this method. 18 By comparison, SLA uses photosensitive resin as the raw material, focuses on the surface of photocurable material using a laser with a specific wavelength and intensity, and solidifies it sequentially from point to line and line to surface to complete a layer of drawing operations; the lifting table moves the height of one layer in the vertical direction and then solidifies the other layer; layers are superimposed in this way to form a three-dimensional entity, [19][20][21] which is solidified and formed layer by layer using computer-controlled UV laser stone tools. SLA can easily and successfully produce prototypes with high surface quality and dimensional accuracy and complex geometric shapes.…”

Section: Introductionmentioning

confidence: 99%

Miniaturized application of 3D‐printed large‐flow microreactor in extraction and separation of platinum, palladium and rhodium

Liu

et al. 2021

J of Chemical Tech & Biotech

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Problems of long extraction time, large footprint, low single‐stage extraction efficiency, and complicated production processes in solvent extraction equipment in recycling of modern industrial precious metal waste liquids are addressed and application of miniaturized equipment to hydrometallurgy is proposed in this study. A 3D‐printed multichannel microfluidic reactor will likely replace traditional extraction equipment. The reactor was applied to experiments concerning tributyl phosphate extraction and separation of platinum, palladium and rhodium precious metal ions in a hydrochloric acid system. Results showed that, under the conditions of a ratio of 1:1 and a flow rate of 192.5 mL min‐1 (processing capacity of 1.5L h‐1), the extraction rates of platinum and palladium are 84.26% and 96%, and the separation coefficient is βPt/Rh and βPd /Rh is 132.35 and 753.5,moreover, the optimized extraction rate of platinum and palladium in the reactor increases by 2% and 1%, respectively. Hence, the extraction effect of this reactor is better than conventional industrial single‐stage extraction (extraction time 12min, platinum extraction rate 87.43%, palladium extraction rate 90.86%, separation coefficients βPd/Rh and βPt/Rh are only 65.3 and 45.7). In summary, compared with conventional extraction, microreactor extraction can increase the separation coefficient, shorten the extraction time, and the total processing capacity can reach the industrial production level. In addition, this study also discussed the influence of microreactor structure optimization on the extraction effect. © 2020 Society of Chemical Industry

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Fabrication of Double-Sided Micro-Lens Array Using UV Injection Molding

Chen

Chang

et al. 2019

International Polymer Processing

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This paper reports the fabrication of double-sided micro-lens arrays using a UV injection molding process. The apparatus for UV injection molding is designed and implemented. Because the double-sided micro-lens array is fabricated using a UV-curable resin, the molds must be transparent. An alignment system is also required to align the cavities. In preparing the transparent molds, the cavities for the concave micro-lens and the alignment marks are first machined on the aluminum block. Using electroforming and hot embossing, transparent polycarbonate (PC) molds that have cavities for the MLAs and the alignment marks are fabricated. The PC molds are mounted on the UV injection molding apparatus using a pneumatic clamp. A real-time optical alignment system that comprises a CCD and an X-Y table is used to align the marks in the upper and lower molds. After alignment, the UV-curable resin is injected into the molds using a pneumatic dispenser. When the resin is cured with UV light, a double-sided micro-lens array is fabricated. The cycle time is 45 s. The respective degrees of replication for a convex and a concave micro-lens array are 99.74 % and 99.00 %. The respective standard deviation values for the diameter and the height are 1.3 μm, and 1.5 μm. The optical properties of the double-sided micro-lens array are measured. The average effective focal length is 1.686 mm, with a standard deviation of 0.007 mm, which demonstrates good formability and uniformity. Using the fabricated micro-lens array, the 1.2 mm diameter of the original light source is reduced to a 50 μm spot diameter. The images of an “A” pattern are complete and clear. This study demonstrates that a UV injection molding process that uses transparent PC molds can be used to fabricate a micro-lens array and other double-sided microstructures.

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The research of UV curing injection molding

Cited by 3 publications

References 9 publications

Lung on a Chip Development from Off-Stoichiometry Thiol–Ene Polymer

Lung on a Chip Development from Off-Stoichiometry Thiol–Ene Polymer

Miniaturized application of 3D‐printed large‐flow microreactor in extraction and separation of platinum, palladium and rhodium

Fabrication of Double-Sided Micro-Lens Array Using UV Injection Molding

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