Injection moulding antireflective nanostructures

Christiansen, Alexander Bruun; Clausen, Jeppe Sandvik; Mortensen, N. Asger

doi:10.1016/j.mee.2014.03.027

Cited by 34 publications

(19 citation statements)

References 14 publications

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“…These structured templates can then be used in a wide range of polymer processing techniques, such as injection molding [12,[35][36][37], injection compression molding [38][39][40], compression molding [41][42][43] and hot embossing [44][45][46][47][48], to produce micro-nanostructured polymer surfaces via replication. Liu et al [14] produced superhydrophobic polymeric surfaces using Al and Al2O3 replicas obtained via the anodization technique.…”

Section: Introductionmentioning

confidence: 99%

Direct replication of micro-nanostructures in the fabrication of superhydrophobic silicone rubber surfaces by compression molding

Maghsoudi

Momen

Jafari

et al. 2018

Applied Surface Science

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We describe a simple method for fabricating superhydrophobic high temperature vulcanized (HTV) silicone rubber surfaces by direct replication using a compression molding system. The resulting rubber samples possessed micro-nanostructures on the surface. This micro-and nanoscale roughness produced a water contact angle of >160º and a contact angle hysteresis of <3º. The roughness patterns on chemically etched aluminum surfaces, which served as templates, were successfully replicated on the rubber surfaces. An antistiction coating applied to the template surface ensured that the rubber was completely removed during demolding and that the replicated micro-nanostructures on the silicone surface were preserved. Surface roughness of the aluminum templates was optimized at HCl concentrations of 15 wt.%, with a lower roughness value observed at acid concentrations above and below this value. The developed HTV silicone rubber surfaces also demonstrated a freezing delay and a self-cleaning capacity.

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Section: Introductionmentioning

confidence: 99%

Direct replication of micro-nanostructures in the fabrication of superhydrophobic silicone rubber surfaces by compression molding

Maghsoudi

Momen

Jafari

et al. 2018

Applied Surface Science

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“…The low surface energy coatings are commonly used as the antistiction coatings using self-assembled monolayer method 5 . In general, fluorocarbon or hydrocarbon based coating materials such as fluorocarbonsilanes [118][119][120][121] , fluorocarbon phosphoric acid 3 , fluorocarbons 54 or alkanethiols 3 are the most common antistiction coatings. Specifically, perfluorodecyltrichlorosilane (FDTS) has been used as an effective antistiction coating.…”

Section: Antistiction Coatingmentioning

confidence: 99%

Micro-nanostructured polymer surfaces using injection molding: A review

Maghsoudi

Jafari

Momen

et al. 2017

Materials Today Communications

131

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Micro injection molding is in great demand due to its efficiency and applicability for industry. Polymer surfaces having micro-nanostructures can be produced using injection molding. However, it is not as straightforward as scaling-up of conventional injection molding. The paper is organized based on three main technical areas: mold inserts, processing parameters, and demolding. An accurate set of processing parameters is required to achieve precise micro injection molding. This review provides a comparative description of the influence of processing parameters on the quality of final parts and the precision of final product dimensions in both thermoplastic polymers and rubber materials. It also highlights the key parameters to attain a high quality micro-nanostructured polymer and addresses the contradictory effects of these parameters on the final result. Moreover, since the produced part should be properly demolded to possess a high quality textured polymer, various demolding techniques are assessed in this review as well.

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“…Such surfaces are usually inspired from nature. Surface nanostructure include hydrophobicity [ 1 ], antireflectivity [ 2 ], antimicrobial properties [ 3 ], water treatment [ 4 ], lab-on-chip devices [ 5 ], etc. One of the best-known structures is the Lotus leaf effect [ 6 ] and there are several articles that intend to explain and copy the lotus effect [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Simulation Approach for Hydrophobicity Replication via Injection Molding

et al. 2021

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Nanopattern replication of complex structures by plastic injection is a challenge that requires simulations to define the right processing parameters. Previous work managed to simulate replication for single cavities in 2D and 3D, showing high performance requirements of CPU to simulate periodic trenches in 2D. This paper presents two ways to approach the simulation of replication of complex 3D hydrophobic surfaces. The first approach is based on previous CFD Ansys Fluent and compared to FE based CFD Polyflow software for the analysis of laminar flows typical in polymer processing and glass forming as well as other applications. The results showed that Polyflow was able to reduce computing time from 72 h to only 5 min as desired in the project. Furthermore, simulations carried out with Polyflow showed that higher injection and mold temperature lead to better replication of hydrophobicity in agreement with the experiments. Polyflow simulations are proved to be a good tool to define process parameters such as temperature and cycle times for nanopattern replication.

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Injection moulding antireflective nanostructures

Cited by 34 publications

References 14 publications

Direct replication of micro-nanostructures in the fabrication of superhydrophobic silicone rubber surfaces by compression molding

Direct replication of micro-nanostructures in the fabrication of superhydrophobic silicone rubber surfaces by compression molding

Micro-nanostructured polymer surfaces using injection molding: A review

Simulation Approach for Hydrophobicity Replication via Injection Molding

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