Preparation and characterization of UV-cured composite films containing ZnO nanostructures: Effect of filler geometric features on piezoelectric response

Malucelli, Giulio; Fioravanti, Ambra; Francioso, Luca; Pascali, Chiara De; Signore, M.A.; Carotta, M.C.; Bonanno, Antonino; Duraccio, Donatella

doi:10.1016/j.porgcoat.2017.04.020

Cited by 25 publications

(16 citation statements)

References 43 publications

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“…On analysing the first heating run, it is visible that addition of both fillers does not influence T g of neat Ebecryl (E0 sample). Glass transition temperature of pure resin was determined as 49 • C and stays in agreement with previously reported data (50 • C) [33]. However, in the presence of the fillers, qualitative differences in plots are unquestionable ( Figures S3 and S4).…”

Section: Resultssupporting

confidence: 89%

“…The first step usually refers to the decomposition of small molecular weight compounds (i.e., dimers or trimers); the second step, the main one, is connected with the major degradation of the polymer network due to cross-links breaking. The last degradation step can be characterized as the oxidation of the degradation products created in the previously reported steps [33]. The presence of the organic fillers increases the onset temperature of the first degradation step as it can be easily noticed by comparing T 10% and T max1 values.…”

Section: Resultsmentioning

confidence: 87%

“…First peak observed in dTG curves situated between approximately 200 and 300 • C is most probably connected with the removal of moisture. The main decomposition steps occur between 300 and 600 • C. Actually, degradation of the films in aerobic atmosphere takes place in three steps [33]. The first step usually refers to the decomposition of small molecular weight compounds (i.e., dimers or trimers); the second step, the main one, is connected with the major degradation of the polymer network due to cross-links breaking.…”

Section: Resultsmentioning

confidence: 99%

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Preparation and Characterization of UV-Curable Acrylic Membranes Embedding Natural Antioxidants

Rajczak

Tylkowski²,

Constantí

et al. 2020

Polymers

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We examine the behaviour of acrylic resin-based membranes containing natural anti-oxidants, such as Galla chinensis tea powder extract (TP) and Taiwanese green propolis (TGP), in different concentrations ranging between 5 and 20 wt %. Membrane morphology was investigated by means of Environmental Scanning Electron Microscopy (ESEM), while the UV-curing reaction was monitored by Fourier-Transform Infra-red (FTIR) spectroscopy. In most cases Thermogravimetric (TG), Differential Scanning Calorimetric (DSC) and Dynamo-mechanical Thermal (DMT) analyses showed that the desirable characteristics of the UV-cured acrylic resin are not substantially altered by the presence of the organic fillers. The release kinetics of polyphenols and flavonoids, determined in water for TP-containing membranes (ETx) and in ethanol/water mixture (7:3 v/v) for TGP-containing ones (EPx), was satisfactory, reaching a plateau after 24 h. Finally, preliminary antibacterial tests against S. epidermidis were performed on the membranes with higher additive amount and gave positive results for ET-type; on the contrary, no inhibitory effect was observed for the tested EP-type membranes.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 87%

Section: Resultsmentioning

confidence: 99%

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Preparation and Characterization of UV-Curable Acrylic Membranes Embedding Natural Antioxidants

Rajczak

Tylkowski²,

Constantí

et al. 2020

Polymers

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“…UV‐cured composite films containing zinc oxide (ZnO) nanostructures with different morphologies were presented by Malucelli et al The UV curable material is a commercially available acrylic resin, namely bis‐phenol A ethoxylate diacrylate (Ebecryl 150), and the studied morphologies of ZnO fillers included nanoparticles (ZNP), bipyramidal structures (ZBP), flower‐like structures (ZNF), and long needles (ZLN) ( Figure ). The different morphologies of the ZnO nanostructures were found to significantly affect the thermo‐oxidative stability and the glass transition temperature of the UV‐cured films.…”

Section: Uv Cured Smart Materialsmentioning

confidence: 99%

Section: Uv Cured Smart Materialsmentioning

confidence: 99%

State‐of‐the‐Art and Future Challenges of UV Curable Polymer‐Based Smart Materials for Printing Technologies

Mendes‐Felipe

Oliveira

Etxebarria

et al. 2019

Adv Materials Technologies

244

168

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The one‐step printing of fully functional electronic devices is one of the main goals of additive manufacturing. In general, this approach is increasingly growing, being one of the key developments additive manufacturing processes based on ultraviolet curing. The main reasons for this increasing interest in UV curing based technologies are its advantages, such as fast curing at room temperature, space and energy efficiency, high‐resolution patterns, and solvent‐free formulations. Despite the important developments, some challenges remain with respect to improving UV curing process and, in particular, to obtain smart UV curable materials, many times based on the inclusion of specific nanoparticles in a UV curable polymer matrix. Thus, this paper reviews the recent developments in UV curable smart materials for printing technologies focusing on both materials and processes. The curing mechanisms and the main materials used in UV photocurable resins are reviewed as well as the main smart and multifunctional materials obtained based on them. Finally, a summary of the main achievement and the future needs are indicated. This review represents therefore a landmark for the development of a new generation of UV curable smart and multifunctional materials and solutions.

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Dual Piezoelectric/Triboelectric Behavior of BTO/SU‐8 Photopatternable Nanocomposites for Highly Efficient Mechanical Energy Harvesting

Beigh

Singh

Goswami

et al. 2022

Adv Elect Materials

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The sustenance of the growing Internet of Things revolution requires suitable self‐powering solutions, which can be appropriately complemented by developing efficient energy harvesting systems. Typically, conventional piezoelectric thin film‐based energy harvesters are not promising due to high cost, low coverage area, and size‐frequency‐power trade‐off. Piezoelectric/triboelectric transduction driven mechanical energy harvesters (MEHs) based on nanocomposites offer better efficiency, cost‐effectiveness, and large‐scale production. Here, % weight ratio‐dependent piezoelectric/triboelectric property analysis, and optimization of Barium Titanate (BTO)/SU‐8 based photopatternable nanocomposite thin films are reported for developing highly efficient MEHs. Further, the performance of the nanocomposite is shown to be enhanced by controlled graphene nano‐platelet doping and ultraviolet (UV) exposure. Elaborate Finite Element Method (FEM) study is performed to support the experimental findings. Finally, three MEH devices are developed based on the optimally prepared variants of the nanocomposite and compared experimentally. A maximum output voltage of ≈3 V and power density of 0.65 µW cm−2 are obtained at 0.75 g and at the resonance frequency of 38 Hz from the graphene doped 20% BTO/SU‐8 based harvester. The prototypes have demonstrated the potential to deliver a regulated output voltage of 3.3 V within 40 s of periodic excitation upon integration with a customized power management unit for powering low‐power electronics.

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Preparation and characterization of UV-cured composite films containing ZnO nanostructures: Effect of filler geometric features on piezoelectric response

Cited by 25 publications

References 43 publications

Preparation and Characterization of UV-Curable Acrylic Membranes Embedding Natural Antioxidants

Preparation and Characterization of UV-Curable Acrylic Membranes Embedding Natural Antioxidants

State‐of‐the‐Art and Future Challenges of UV Curable Polymer‐Based Smart Materials for Printing Technologies

Dual Piezoelectric/Triboelectric Behavior of BTO/SU‐8 Photopatternable Nanocomposites for Highly Efficient Mechanical Energy Harvesting

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