UV Curable Robust Durable Hydrophobic Coating Based on Epoxy Polyhedral Oligomeric Silsesquioxanes (EP-POSS) and Their Derivatives

Zhang, Peng; Qin, Ban; Xia, Jianhui

doi:10.1021/acsomega.2c00534

Cited by 10 publications

(5 citation statements)

References 45 publications

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“…It can be seen from the 29 Si‐NMR (ppm, C 4 D 8 O) diagram that there are three characteristic peaks: 65.8 (Si, SiCH 2 ), 78.3 (3Si, Si[Ph]OSiCH 2 ), and 79.8 (4Si, Si[Ph]OSiPh). Each peak position has a good attribution, and the integrated area of each peak is consistent with the theoretical value, which indicates that MP was successfully synthesized 32,33 …”

Section: Resultssupporting

confidence: 73%

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Novel functionalized isocyanate groups polyhedral oligomeric silsesquioxanes/epoxy composites with advanced thermal and moisture resistance properties

Jiang

et al. 2023

J of Applied Polymer Sci

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The rapid development of the electronic packaging industry has necessitated the production of epoxy resin insulation materials with high heat resistance and low water absorption. In this study a new cross‐linking composite composed of polyhedral oligomeric silsesquioxane (POSS) functionalized with isocyanate groups and epoxy resin (EP) containing phenolic hydroxyl groups. By employing an isocyanate‐hydroxyl process, the cage structure of Ph7POSS with isocyanate functionalization (MP) can be suspended on EP, leading to a significant improvement in the thermal and moisture resistance of the MP/EP composite. Our DSC and TGA studies revealed that the addition of 3% MP to the epoxy resin increased the glass transition temperature by 27.1°C and raised the initial thermal breakdown temperature to 334.5°C. We also utilized a novel quartz crystal microbalance (QCM) technique to continuously monitor the moisture resistance of the composite, and our results showed that the composite absorbed only 0.03% of water. Moreover, the porosity and cross‐linking of the POSS molecules further restricted the movement of the polymer chains, thereby reducing the dielectric constant and dielectric loss of the composite. Consequently, the MP‐modified epoxy composites exhibit excellent properties, which suggest promising applications in the field of electronic packaging.

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Section: Resultssupporting

confidence: 73%

“…28 Meanwhile when the nitrogen atom is attached to Each peak position has a good attribution, and the integrated area of each peak is consistent with the theoretical value, which indicates that MP was successfully synthesized. 32,33…”

Section: Characterizationmentioning

confidence: 99%

Novel functionalized isocyanate groups polyhedral oligomeric silsesquioxanes/epoxy composites with advanced thermal and moisture resistance properties

Jiang

et al. 2023

J of Applied Polymer Sci

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“…The peaks at 971, 1204, 1410, and 1602 cm −1 are assigned to the ═CH 2 wagging vibrations, C─F stretching vibrations, ═CH 2 scissoring vibrations and C═C stretching vibrations, respectively. [ 20a,21 ] Compared to the PP@pTA/SNFs coating, a significant increase in the peak intensity in the 1150–1250 cm −1 region (C─F stretching) was observed in the spectrum of the PP@pTA/SNFs/PFDT coating. This means successful grafting of PFDT onto the surface by the thiol–ene reaction, which helps reduce the surface energy from 27.64 mN m −1 of the PP@pTA/SNFs coating to 15.09 mN m −1 of the PP@pTA/SNFs/PFDT coating as calculated by the Owens‐Wendt‐Rabel and Kaelble method.…”

Section: Resultsmentioning

confidence: 99%

Durable Superhydrophobic Surfaces with Self‐Generated Wenzel Sites for Efficient Fog Collection

Zhang,

Li,

Zhou

et al. 2024

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Harvesting freshwater from fog is one of the possible solutions to the global water scarcity crisis. Surfaces with both hydrophobic and hydrophilic regions are extensively employed for this purpose. Nevertheless, the longevity of these surfaces is still constrained by their delicate surface structures. The hydrophilic zones may become damaged or contaminated after repeated use, thereby compromising their effectiveness in fog collection. The preparation of generally applicable durable superhydrophobic coatings with self‐generated Wenzel sites is reported here for long‐term efficient and stable fog collection. The coatings are prepared by depositing the poly(tannic acid) coating as the primer layer on various substrates, self‐assembly of trichlorovinylsilane into staggered silicone nanofilaments, and then thiol–ene click reaction with 1H,1H,2H,2H‐perfluorodecanethiol. The coatings demonstrate remarkable static superhydrophobicity, robust impalement resistance, and stable self‐generated Wenzel sites for water droplets. Therefore, the fog collection rate (FCR) of the coatings reaches 2.13 g cm−2 h−1 during 192 h continuous fog collection, which is triple that of bare substrate and outperforms most previous studies. Moreover, the systematic experiments and models have revealed that the key factors for achieving high FCR on superhydrophobic coatings are forming condensed droplets ≈1 mm in critical radius and a Wenzel site proportion of 0.3–0.4.

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“…Another approach in hydrophobic coating development with UV-light was reported by Zhang. 33 The authors produced a series of the coatings based on epoxy polyhedral oligomeric silsesquioxanes, which could be used as wood coatings, among other things. Despite the hydrophobic nature of these compounds, the highest CA determined was up to 108°.…”

Section: Hydrophobic Properties Of the Acrylated Epoxidized Linseed O...mentioning

confidence: 99%

Interaction of porous substrate and vegetable oil-based hydrophobic thermoset coatings during UV-polymerization

Husić,

Mahendran,

Sinic

et al. 2023

Journal of Plastic Film & Sheeting

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In the current study, we report the progress in developing new UV polymerizable hydrophobic biobased coatings from modified vegetable oil for porous substrates like paper and wood. The aim was to produce novel hydrophobic coatings on porous substrates and investigate how the porous nature of the substrates will be affected by different chemical formulations that penetrate into the interior of the substrate during the exposure to different intensities of UV light, and what hydrophobic properties that interaction will result in. The curing formulations were based on acrylated epoxidized linseed oil (AELO) as a prepolymer. For the UV polymerization, 1-hydroxycyclohexyl phenyl ketone (Irgacure 184) was used as a photoinitiator; isobornyl acrylate (IBA) and isosorbide methacrylate (IM) were used as bio-based diluents; hexadecyltrimethoxysilane (HDTMS), vinyl-polydimethylsiloxane (v-PDMS), triethoxyoctylsilane (TEOS) were used as hydrophobic additives and they were added in different concentrations to the AELO curing formulations. The formulations were then cured under UV light on wood and paper substrates. FT-IR analysis showed that the AELO resin was successfully polymerized on both paper and wood substrates, and by contact angle measurements it was found that the highest hydrophobicity was achieved for the coatings that contain HDTMS (108° in average). The layer thickness on wood substrates was in between 9 and 20 µm, and on paper substrates between 8 and 24 µm. Only about a 5° difference in contact angle was observed between the coatings with respect to change in diluents and different UV light intensity. All cured samples showed a good chemical resistance to acetic acid, citric acid and ethyl alcohol after 1 hour exposure; to acetone and ethylbutyl acetate after 10 s, and to benzine after 2 minutes. Outstanding hydrophobic behavior was observed for the HDTMS coatings, however, better physical properties were determined for the coatings containing v-PDMS and TEOS, on which the scratching was observed after the applied force of 1.5 and 0.6 N in comparison to HDTMS coatings (0.4 N). The resulting properties achieved for the AELO coatings indicated that it has a potential to be used for wood coating and packaging application.

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UV Curable Robust Durable Hydrophobic Coating Based on Epoxy Polyhedral Oligomeric Silsesquioxanes (EP-POSS) and Their Derivatives

Cited by 10 publications

References 45 publications

Novel functionalized isocyanate groups polyhedral oligomeric silsesquioxanes/epoxy composites with advanced thermal and moisture resistance properties

Novel functionalized isocyanate groups polyhedral oligomeric silsesquioxanes/epoxy composites with advanced thermal and moisture resistance properties

Durable Superhydrophobic Surfaces with Self‐Generated Wenzel Sites for Efficient Fog Collection

Interaction of porous substrate and vegetable oil-based hydrophobic thermoset coatings during UV-polymerization

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