Preparation of UV-curable PSAs by grafting isocyanate-terminated photoreactive monomers and the effect of the functionality of grafted monomers on the debonding properties on Si wafers

Park, Hee-Woong; Seo, Hyun-Su; Kwon, Kil Koang; Shin, Seunghan

doi:10.1039/d3ra00398a

Cited by 3 publications

(1 citation statement)

References 26 publications

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“…It was reported that the viscoelastic PFPE residue remained after the UV curing process. [30][31][32][33] The viscoelastic PFPE residue remaining on the surface of the stencil can improve the filter efficiency by promoting adhesion force between particles and the surface and preventing particle bounce-off. As illustrated in Figure 5, it is confirmed that a greater amount of particles was captured to the PFPE stencil surface compared to the PUA stencils, in the same face velocity, spacing between polymeric stencils, and stacking configuration.…”

Section: The Pfpe Polymeric Stencils For Enhanced Filter Efficiencymentioning

confidence: 99%

Reusable and Transparent Impaction‐Based Filter with Micro Apertured Multiscale Polymeric Stencil for Particulate Matter Capture

Kim,

Lee,

Jang

et al. 2023

Macro Materials & Eng

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Air pollution by particulate matter (PM) in the air including PM1.0, PM2.5, and PM10, which are categorized by particle size, is a critical global environmental issue, harming the climate, ecosystems, and human health. Especially, ultrafine dust including PM1.0 and PM2.5 poses significant human health risks. Commercial fabric‐based filters effectively trap PMs but cause high‐pressure drop and limited filter capacity and reusability. Electrospun nanofiber filters address some issues but have low mechanical strength, toxic exposure risks, long fabrication times, and restrained reusability. Herein, a reusable and transparent impaction‐based PM filter using a UV‐curable polymeric stencil with micro apertures is proposed. The polymeric stencil filters achieve high filter efficiency (68–94%), superior filter capacity, and low‐pressure drop (<64 Pa). The polymeric stencil filters can be easily cleaned with water or ethanol and remain stable under extreme temperatures (−196 to 450 °C) with slight shrinkage (0–7%). The polymeric stencil filters can be broadly utilized for not only industrial, indoor, and vehicle filters but also transparent and flexible facial health masks.

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Section: The Pfpe Polymeric Stencils For Enhanced Filter Efficiencymentioning

confidence: 99%

Reusable and Transparent Impaction‐Based Filter with Micro Apertured Multiscale Polymeric Stencil for Particulate Matter Capture

Kim,

Lee,

Jang

et al. 2023

Macro Materials & Eng

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A novel CO2 based UV-induced peelable adhesive for wafer dicing

Chen

Cui

Ding

et al. 2023

Progress in Organic Coatings

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Sustainable PLA Bio-Nanocomposites: Integration of TPU Nanofibrils and CNC for Enhanced Crystallization, Toughness, Stiffness, Transparency, and Oxygen Barrier Properties

Monfared,

Omranpour,

Tuccitto

et al. 2024

ACS Sustainable Chem. Eng.

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This study explores the interplay between elastomeric nanofibrillar thermoplastic polyurethane (TPU) and cellulose nanocrystals (CNCs) to expand the applications of poly(lactic acid) (PLA) composites via optimization of the nanofibril TPU/CNC ratio. Advanced analytical methods reveal the contrasting effects of CNC stiffening and TPU toughening capabilities. Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR) confirm isophorone diisocyanate (IPDI) as a cross-linker and chain extender, altering the polymer network, while X-ray photoelectron spectroscopy (XPS) suggests hydrogen bonding between CNC and TPU. Scanning electron microscopy (SEM) shows that CNC reduces TPU spherical domain sizes from 270–350 to 200–270 nm and alters the nanofibril TPU diameter from 90–280 to 100–320 nm. CNC accelerates PLA crystallization, reducing the crystallization half-time from 21 to 0.87 min, and optimizes crystallinity at 100 °C. Higher annealing temperatures reduce oxygen transmission rates from 66 to 16 cc/(m2·day) with 1 wt % CNC at 130 °C due to denser α-crystal formation. Transparency studies show minimal impact on PLA clarity up to 0.6 wt % CNC, with fibrillar TPU maintaining superior transparency. Mechanical tests reveal significant increases in tensile toughness, from 1.9 MPa in neat PLA to 30.9 and 38.2 MPa with 3 and 6 wt % TPU, respectively. CNC further enhances these properties at lower TPU concentrations, improving tensile strain up to 3900 times that of neat PLA while maintaining tensile strength and Young’s modulus. Morphological analysis reveals detailed toughening mechanisms, where integrating fibril TPU with CNC refines void structures and enhances fibril formations, leading to ductile cup-and-cone fracture behaviors. This configuration significantly improves ductility, promoting plastic deformation and forming microvoids and crazes. These findings highlight the potential of optimized CNC and TPU ratios to broaden the functional scope of PLA composites, suggesting promising strategies for advanced material design toward an eco-friendlier industry.

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Preparation of UV-curable PSAs by grafting isocyanate-terminated photoreactive monomers and the effect of the functionality of grafted monomers on the debonding properties on Si wafers

Abstract: Photoreactive pressure-sensitive adhesives (PSAs) were prepared by grafting mono- or difunctional photoreactive monomers onto acrylic PSA, and their adhesion properties were evaluated before and after UV curing for application as dicing tape.

Cited by 3 publications

References 26 publications

Reusable and Transparent Impaction‐Based Filter with Micro Apertured Multiscale Polymeric Stencil for Particulate Matter Capture

Reusable and Transparent Impaction‐Based Filter with Micro Apertured Multiscale Polymeric Stencil for Particulate Matter Capture

A novel CO2 based UV-induced peelable adhesive for wafer dicing

Sustainable PLA Bio-Nanocomposites: Integration of TPU Nanofibrils and CNC for Enhanced Crystallization, Toughness, Stiffness, Transparency, and Oxygen Barrier Properties

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