Development of Method Enhanced Laser Ablation Efficiency According to Fine Curvature of the Polymer through the Preliminary Preparation Process Using UV Picosecond Laser

Ham, Seung Sik; Lee, Ho

doi:10.3390/polym12040959

Cited by 4 publications

(5 citation statements)

References 30 publications

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“…The direct impact of a laser spot on the surface of a material results in, depending on the type of the material and the parameters of the laser beam (wavelength, pulse duration, repetition frequency, etc. ), burning, melting, sublimation, depolymerisation (PMMA), ablation [ 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ] (in particular desorption), foaming, colour change, and annealing (metals). The traditional method of direct processing with a CO 2 laser beam has already been used for several years.…”

Section: Theoretical Basesmentioning

confidence: 99%

“…When processing polycarbonates, polyethylene terephthalate or polystyrene, it is required to use a laser radiation wavelength of less than 308 nm, which is provided by an ArF excimer laser (GAM Laser, Orlando, FL, USA). When using radiation energy which is lower or higher than the ablation threshold of the listed polymeric materials, respectively, an improvement in the hydrophilic or hydrophobic properties is ensured, which is accompanied by an increase in roughness [ 2 , 3 , 4 , 5 , 26 ].…”

Section: Theoretical Basesmentioning

confidence: 99%

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The Efficiency of UV Picosecond Laser Processing in the Shaping of Surface Structures on Elastomers

2020

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Elastomers are used as construction materials in numerous industries, and in particular the biomedical industry, mechatronics, electronics, the automotive industry, and chemical devices. The paper presents the results of tests involving the effects of microprocessing of elastomeric materials using a UV laser emitting picosecond pulses. In particular, it presents an analysis of the influence of the parameters of processing on its efficiency. The paper provides a recommendation of the most advantageous processing parameters for materials such as polyurethane and silicone (MVQ). The authors see prospects for the use of the developed technology in the techniques of sealing and microfluidisation. The final part of the paper presents examples of surface structures generated on elements made of artificial materials and the results of tests involving reduction of friction resistance of sealing rings in a pneumatic actuator.

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Section: Theoretical Basesmentioning

confidence: 99%

Section: Theoretical Basesmentioning

confidence: 99%

The Efficiency of UV Picosecond Laser Processing in the Shaping of Surface Structures on Elastomers

2020

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“…8 One indicator to evaluate the efficiency of ablation is the ablation threshold. 9 The ablation threshold is defined as the required energy input to initialize matter removal via photoinduced disintegration. 10,11 The primary process of photon absorption, e.g., light absorption by linear or nonlinear processes, electron relaxation processes, or ionization processes needs to be considered.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Furthermore, the ablation efficiency of a particular material depends on different laser parameters such as wavelength, fluence, pulse width, and repetition rate, and the optical, thermal, and mechanical properties of the ablation target . One indicator to evaluate the efficiency of ablation is the ablation threshold . The ablation threshold is defined as the required energy input to initialize matter removal via photoinduced disintegration. , The primary process of photon absorption, e.g., light absorption by linear or nonlinear processes, electron relaxation processes, or ionization processes needs to be considered. , Typically, the laser energy deposition causes heating as well as phase transitions like melting and vaporizing, which finally result in an explosive material removal process.…”

Section: Introductionmentioning

confidence: 99%

Nanodiamond-Polymer Composites for Decreased Laser Ablation Thresholds

Laube,

Yang,

Naumann

et al. 2024

ACS Appl. Nano Mater.

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During the past decade, nanodiamonds were demonstrated to be an environmentally friendly, easy-to-handle, accessible additive for polymer science, which also offers sensory-relevant properties. Therefore, nanodiamond-based composites are promising substrates for medical applications, heat transfer materials in electronic devices, or three-dimensional (3D) materials for sensor applications within various fields related to automotive, sensory, and printing applications. One key factor for the implementation of composite materials in modern devices is the precise and energy-efficient structuring of the material. Herein, laser ablation-induced structuring using pulsed laser systems is one of the most applied approaches to achieve micro-and nanostructure surfaces. In this work, nanodiamond additives were demonstrated to have a significant beneficial impact on the laser ablation performance of nanodiamond acrylate composites, in particular, on the laser ablation threshold and the incubation effect. Furthermore, we show that surface modification using the surface graphite content is a crucial parameter for the ablation. Employing a controlled surface graphitization of the nanodiamonds, their optical properties and interaction with the polymer can be influenced to improve the laser ablation performance of composites. In comparison to pure sp 2 carbon additives like graphene oxide, graphitized nanodiamond composites exhibit higher optical density and diffuse light scattering properties. These properties lead to a more surface-located light-induced energy input. The investigations of the laser ablation spot also allowed first insight into the mechanism of the ablation, where the surface graphite of the nanodiamond also influences the bonding strength of the nanodiamond (ND) to the acrylate system. This supports thermal and mechanical ablation and, thus, a decrease of the laser ablation threshold energy. Our results demonstrate that nanodiamond composites are promising materials for laser structuring processing. Further improvement of the diamond surface might even improve their applicability.

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“…It is primarily the aviation industry where the need for the technology of adhesive joints and gluing was created by the introduction of new, lightweight construction materials [9][10][11][12]. The laser treatment of polymeric materials has been described in many scientific publications [13][14][15][16][17]. Over the last decade, industry has used laser devices even more frequently [18,19], as is widely described in scientific papers from various fields [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Adhesive Joints with Laser Shaped Surface Microstructures

et al. 2021

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One of the most commonly applied methods of joining dissimilar materials is gluing. This could be mainly attributed to the applicability of this technique in various industries. The article presents a method of material surface treatment, which increases the shear strength of adhesive joints for lightweight metals such as aluminum with plastics. For this purpose, laser surface microstructuring was performed on each of the selected construction materials. As a result of the performed treatment, the active surface of the glued area was increased, which increased the adhesive strength. The picosecond laser with UV radiation used in the research is TruMicro 5325c with which material can be removed as a result of the cold ablation phenomenon. The applied parameters of the laser device did not cause thermal damage to the surface of the microstructured materials, which was confirmed by microscopic examination. Laser micromachining did not deteriorate the degree of wetting of the tested materials, either, as was confirmed by the contact angle and surface energy measurements with the use of water as the measuring liquid. In investigated cases of microstructure types, the presented method significantly increased the shear strength of the joints formed, as demonstrated by the presented strength test results. Research has shown that created joints with microstructure made according to the described method, are characterized by a significant increase in strength, up to 376%, compared to materials without microstructure. The presented results are part of a series of tests aimed at selecting the operating laser parameters for the implementation of geometric shapes of microstructures which will increase the strength of adhesive joints in selected materials.

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Development of Method Enhanced Laser Ablation Efficiency According to Fine Curvature of the Polymer through the Preliminary Preparation Process Using UV Picosecond Laser

Cited by 4 publications

References 30 publications

The Efficiency of UV Picosecond Laser Processing in the Shaping of Surface Structures on Elastomers

The Efficiency of UV Picosecond Laser Processing in the Shaping of Surface Structures on Elastomers

Nanodiamond-Polymer Composites for Decreased Laser Ablation Thresholds

Adhesive Joints with Laser Shaped Surface Microstructures

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