Development of Durable, Fluorine-free, and Transparent Superhydrophobic Surfaces for Oil/Water Separation

Chen, Chaolang; Ding, Wei; Chen, Shuai; Mahmood, Awais; Wang, Jiadao

doi:10.1021/acsomega.9b00518

Cited by 27 publications

(33 citation statements)

References 52 publications

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“…In [8], a suspension of SiO 2 microspheres and poly(dimethylsiloxane) was used for fabrication of a highly transparent, superhydrophobic and self-cleaning coating. A two-layer combination was applied in [9], where adhesive and hydrophobic suspensions of SiO 2 nanoparticles (average size 16 nm) were sprayed in succession on various surfaces leading to a CA of about 160 • . In most cases, for the combination of high optical transmittance and superhydrophobicity to work, surface roughness should be adjusted to submicrometer scale.…”

Section: Introductionmentioning

confidence: 99%

SiO2-Based Nanostructured Superhydrophobic Film with High Optical Transmittance

et al. 2020

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Superhydrophobic and transparent films would be very useful in optoelectronic applications where non-wetting is desired. Herein, hexamethyldisilazane was used for functionalization of fumed SiO2 nanoparticles via silylation derivatization reaction. Modified fumed SiO2 nanoparticle dispersion was used for fabrication of SiO2-based nanostructured film via drop-casting method. This film exhibited a combination of high optical transmittance in the visible spectrum portion and superhydrophobicity (163° ± 1° and hysteresis as low as ~2°). This was possible to achieve due to the submicrometer-scale roughness (Rq = 252.7 nm) and branched network structure of the film surface with convenient surface chemistry of hydrophobic methyl groups. The method reported herein is not complicated, allows for obtaining large quantities of modified SiO2 nanoparticle dispersions and can be used in combination with other deposition methods.

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Section: Introductionmentioning

confidence: 99%

SiO2-Based Nanostructured Superhydrophobic Film with High Optical Transmittance

et al. 2020

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“…As shown in Figure S10 in the Supporting Information, the size of ICG@COF‐1@PDA nanosheets (with PEG modification) also exhibited negligible change in phosphate buffer solution (PBS) or 10% fetal bovine serum (FBS) for up to 24 h incubation at 37 °C. Nevertheless, ICG@COF‐1@PDA nanosheets without PEG modification was unstable under physiological conditions, which could be attributed to plasma protein mediated aggregation (Figure S11, Supporting Information) . These results suggested that ICG@COF‐1@PDA nanosheets would remain stable after administration, maintaining maximal phototherapeutic capacity.…”

Section: Resultsmentioning

confidence: 99%

Covalent Organic Framework‐Supported Molecularly Dispersed Near‐Infrared Dyes Boost Immunogenic Phototherapy against Tumors

Gan

Tong

Zhang

et al. 2019

Adv Funct Materials

115

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Photodynamic therapy (PDT) mediated by near‐infrared (NIR) dyes is a promising cancer treatment modality; however, its use is limited by significant challenges, such as hypoxic tumor microenvironments and self‐quenching of photosensitizers. These challenges hamper its utility in inducing immunogenic cell death (ICD) and triggering potent systemic antitumor immune responses. This study demonstrates that molecular dispersion of NIR dyes in nanocarriers can significantly enhance their ability to produce reactive oxygen species and potentiate synergistic PDT and photothermal therapy against tumors. Specifically, NIR dye indocyanine green (ICG) can be spontaneously adsorbed to covalent organic frameworks (COFs) via π–π conjugations to prevent intermolecular stacking interactions. Then, ICG‐loaded COFs are ultrasonically exfoliated and coated with polydopamine (PDA) to construct a new phototherapeutic agent ICG@COF‐1@PDA with enhanced efficacy. In conjunction with ICG@COF‐1@PDA, a single round of NIR laser irradiation can induce obvious ICD, elicit antitumor immunity in colorectal cancer, and yield 62.9% inhibition of untreated distant tumors. ICG@COF‐1@PDA also exhibits notable phototherapeutic efficacy against 4T1 murine breast to lung metastasis, a spontaneous metastasis mode for triple‐negative breast cancers (TNBCs). Overall, this study reveals a novel nanodelivery system for molecular dispersion of NIR dyes, which may present new therapeutic opportunities against primary and metastatic tumors.

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“…A magnetic Fe 3 O 4 core modified with a 20‐nm PDA layer loaded with trypsin was shown to be effective in the rapid digestion of peptides even at a low concentration of 5 ng μL −1 . A sample with 85.9 μg mg −1 trypsin was able to digest proteins in 30 min compared to 12 h in a conventional process in solution.…”

Section: Immobilized Enzymes As Catalystsmentioning

confidence: 99%

Polydopamine – its Prolific Use as Catalyst and Support Material

Molnár

2020

ChemCatChem

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Polydopamine is a mussel-inspired functional material with a unique ability to form surface coatings. It is a green, environmentally benign product available very easily for a multitude of varied applications. This review attempts to collect useful information with respect to polydopamine-based catalytic studies with the use of polydopamine and modified polydopamine preparations loaded with varied catalytically active species including metal ions and metal particles. Major sections are about the use of polydopamine as catalyst material, utilization of immobilized enzymes, removal of toxic materials, results in organic synthesis, and fuel cell applications. A few examples of chiral catalysis and results of recycling studies are also treated. Data collected and analyzed indicate the importance and high potential of polydopamine-based catalysts in sustainable chemistry. of subunits attacked by an immobilized cyclohexeneamine (5) was suggested to be the transition state of CÀ C bond formation.Edouard et al. prepared catalyst 0.29 % PDA/PU by depositing PDA onto polyurethane foam (PU, 180 � 20 mg, 8 cm 3 ) and used it for the reduction of methylene blue (MB) with NaBH 4 . [48] Activities decreased gradually with repeated uses from 100 % to 35 % in run 11 but partial reactivation was achieved upon keeping the sample at 67°C for 8 h (55 % dropping below 10 % in run 13). Exposure to air at room temperature for six days proved to be somewhat more beneficial (90 % conversion in run 14 decreasing to 48 % in run 18). In a recent study they fabricated two oxidized PDA/PU samples and then loaded them with NaBH 4 . [49] One made by the usual method (dopamine/Tris, rt, 12 h, in air; sample PDA O2 PU), whereas the other was made by treating PU in a mixture of dopamine, NaOAc, and NaIO 4 (pH 5, rt, 24 h). The sample was dried (67°C) and washed thoroughly with water (PDA NaIO4 PU). Both products were dipped into an aqueous solution of NaBH 4 (0.1 M, 10 min) to afford boron contents of 2.37 and 2.11 wt%. The catalysts tested in the degradation of MB showed high activities with efficiencies of 97 % and 98 %, respectively (NaBH 4 /MB molar ratio 40, 177 mg and 209 mg catalysts, 25 min). During five reuses, the pH of the reaction medium increased because of boron loss (0.78 wt% and 0.81 wt%). The activity of PDA NaIO4 PU decreased to 89 % in run five. However, dipping the used sample into a 0.1 M NaBH 4 solution restored the original efficiency of 98 %. This, however, was only a temporary remedy, since a low efficiency of 60 % was measured in run 10. PDA was suggested by the authors to act as a redox mediator to prevent the hydrolysis/oxidation of immobilized borohydride.This formula (5) should be moved up and placed before the paragraph starting with "Edouard et al…"The Zuo group used PDA particles (avg. diameter 240 nm) to induce the reduction of MB and rhodamine B (RhB) with NaBH 4 . [50] Quinone moieties of PDA were assumed to channel electrons from NaBH 4 to the dyes. Indeed, PDA oxidized with NaIO 4 exhibited increased degradatio...

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Development of Durable, Fluorine-free, and Transparent Superhydrophobic Surfaces for Oil/Water Separation

Cited by 27 publications

References 52 publications

SiO2-Based Nanostructured Superhydrophobic Film with High Optical Transmittance

SiO2-Based Nanostructured Superhydrophobic Film with High Optical Transmittance

Covalent Organic Framework‐Supported Molecularly Dispersed Near‐Infrared Dyes Boost Immunogenic Phototherapy against Tumors

Polydopamine – its Prolific Use as Catalyst and Support Material

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