High-gravity-hydrolysis approach to transparent nanozirconia/silicone encapsulation materials of light emitting diodes devices for healthy lighting

He, Xianglei; Tang, Ruijie; Pu, Yuan; Wang, Jie‐Xin; Wang, Zhi; Wang, Dan; Chen, Jianfeng

doi:10.1016/j.nanoen.2019.05.024

Cited by 36 publications

(23 citation statements)

References 37 publications

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“…The high‐gravity level ( β ) reflects the centrifugal force strength in RPB, which is controlled by the rotational speed. The formula is shown in Equation () 32 :

β goodbreak= \frac{ω^{2} r}{g}

where, ω is the angular velocity of the rotor in RPB (rad s −1 ), g is the acceleration of gravity (m s −2 ), and r is the radius of packing (m). The Cur@Lac nanoparticles were obtained by freeze‐drying from the dispersions in a vacuum freeze drier (FD‐1A‐50, Beijing Boyikang Instruments Co., Ltd.) at −40 °C for 2 days.…”

Section: Methodsmentioning

confidence: 99%

Synthesis of curcumin‐loaded shellac nanoparticles via co‐precipitation in a rotating packed bed for food engineering

Zou

Wang

et al. 2022

J of Applied Polymer Sci

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Practical application of versatile nanomaterials to food engineering is desirable. In this study, highly encapsulated curcumin-loaded shellac (Cur@Lac) nanoparticles are efficiently prepared via a rotating packed bed (RPB). In this modified coprecipitation process, the morphology of Cur@Lac nanoparticles is systematically investigated under experimental parameters involving the high-gravity level, the volume of antisolvent and the concentration of shellac. By virtue of the highly structured polymeric ester matrices of shellac and adequate supersaturation brought from RPB on a microscale, the obtained Cur@Lac nanoparticles with uniform size exhibit high encapsulation efficiency of over 96%. After 2 months of storage at room temperature, the aqueous Cur@Lac nanodispersions exhibit longterm stability with no agglomeration or sedimentation, and the final retention rate of curcumin was over 85%. Colored drinks of fruit syrup (pH = 4.0), fruit soda (pH = 6.0), and soda water (pH = 8.3) are prepared by using the Cur@Lac as the colorant, which possessed orange-yellow color. The nanocomposites of alkalisensitive indicators based on cellulose paper and gelatin film demonstrated in the work show promising application value for sensing of alkaline solution and gas of perishable food.

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“…The high‐gravity level ( β ) reflects the centrifugal force strength in RPB, which is controlled by the rotational speed. The formula is shown in Equation () 32 :

β goodbreak= \frac{ω^{2} r}{g}

Section: Methodsmentioning

confidence: 99%

Synthesis of curcumin‐loaded shellac nanoparticles via co‐precipitation in a rotating packed bed for food engineering

Zou

Wang

et al. 2022

J of Applied Polymer Sci

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“…[ 11–16 ] Some articles are devoted to the modification of zirconia nanoparticles with polysiloxane or the dispersion of zirconia nanoparticles in a polysiloxane matrix. [ 3,17–20 ] There is little information about the reaction of Si‐H functional polysiloxanes with zirconium alkoxides. The first paper describing the modification of Si‐H functional siloxane copolymer with zirconium alkoxides has recently been published.…”

Section: Figurementioning

confidence: 99%

Reactions of Zirconium (IV) n‐Propoxide with SiH‐Functional Polysiloxanes as a Route to Siloxane–Zirconium Hybrid Materials with Enhanced Refractive Index

Rubinsztajn

Chojnowski

Mizerska

et al. 2020

Macromol. Rapid Commun.

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The reaction of poly(hydromethylsiloxane‐co‐methylphenylsiloxane) with zirconium (IV) n‐propoxide in dry toluene leads to extensive scission of the siloxane chain and conversion of Si‐H groups. These processes produce oligomeric siloxanes and organosilanes containing moisture sensitive propoxy and siloxy‐zirconate groups. The obtained post‐reaction solution of zirconium containing heterosiloxane oligomers is stable under anhydrous conditions for several weeks. However, its exposure to moisture initiates the hydrolytic condensation of the reactive groups leading to cross‐linking and the formation of a siloxane–zirconium composite. Spin coating of the siloxane–zirconium prepolymer followed by exposure to moisture produces thin films with excellent light transparency and increased refractive index. The final coatings are characterized by ellipsometry, UV–Vis, IR, and 29Si MAS NMR spectroscopies.

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“…For the future development of top-emitting and transparent PeLEDs, the introduction of the encapsulation experience from other kinds of LEDs are helpful. For example, Chen et al showed a high-gravity-hydrolysis approach for the synthesis of transparent nanozirconia/silicone hybrid materials, which was used as the encapsulation of GaN-based white LEDs with enhanced light extraction efficiency and reduced blue light exposure [248]. These reported encapsulation methods are also suitable for PeLEDs.…”

Section: The Introduction Of Advanced Encapsulationsmentioning

confidence: 99%

Advances in Perovskite Light-Emitting Diodes Possessing Improved Lifetime

Xiao

Cheng

et al. 2021

Nanomaterials

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Recently, perovskite light-emitting diodes (PeLEDs) are seeing an increasing academic and industrial interest with a potential for a broad range of technologies including display, lighting, and signaling. The maximum external quantum efficiency of PeLEDs can overtake 20% nowadays, however, the lifetime of PeLEDs is still far from the demand of practical applications. In this review, state-of-the-art concepts to improve the lifetime of PeLEDs are comprehensively summarized from the perspective of the design of perovskite emitting materials, the innovation of device engineering, the manipulation of optical effects, and the introduction of advanced encapsulations. First, the fundamental concepts determining the lifetime of PeLEDs are presented. Then, the strategies to improve the lifetime of both organic-inorganic hybrid and all-inorganic PeLEDs are highlighted. Particularly, the approaches to manage optical effects and encapsulations for the improved lifetime, which are negligibly studied in PeLEDs, are discussed based on the related concepts of organic LEDs and Cd-based quantum-dot LEDs, which is beneficial to insightfully understand the lifetime of PeLEDs. At last, the challenges and opportunities to further enhance the lifetime of PeLEDs are introduced.

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High-gravity-hydrolysis approach to transparent nanozirconia/silicone encapsulation materials of light emitting diodes devices for healthy lighting

Cited by 36 publications

References 37 publications

Synthesis of curcumin‐loaded shellac nanoparticles via co‐precipitation in a rotating packed bed for food engineering

Synthesis of curcumin‐loaded shellac nanoparticles via co‐precipitation in a rotating packed bed for food engineering

Reactions of Zirconium (IV) n‐Propoxide with SiH‐Functional Polysiloxanes as a Route to Siloxane–Zirconium Hybrid Materials with Enhanced Refractive Index

Advances in Perovskite Light-Emitting Diodes Possessing Improved Lifetime

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