In situ hydrothermal synthesis of polysiloxane@3D flower-like hollow Mg Al LDH microspheres with superior light diffusing properties for optical diffusers

Zhong, Xi; Hu, Saichun; Wang, Yongjuan; Zhou, Yuming; Hu, Jingang; He, Min; Tong, Yuan; Fan, Lidan; Cai, Zhilan; Ding, Qinghua

doi:10.1016/j.clay.2019.01.008

Cited by 20 publications

(6 citation statements)

References 54 publications

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“…The high‐resolution XPS spectrum of Si 2P showed peaks at 101.9, 102.45, 103.1, and 106.2 eV, which were assigned to Si─C, Si─O─C, Si─O─M (M = Mg/Al), and Si─O─Si bonds, respectively. The results revealed that self‐condensation reaction of the coupling agent formed Si─O─Si, simultaneously, and it could convincingly prove that the coupling agent was grafted onto the surface of LDH forming Si─O─M bond . Moreover, we can find that the high resolution XPS spectrum of P 2P shows peaks at 132.2, 133.05, and 133.85 eV, which were attributed to P─C, P─ph, and P(═O)─O─C, respectively .…”

Section: Resultsmentioning

confidence: 62%

A flame‐retardant DOPO‐MgAl‐LDH was prepared and applied in poly (methyl methacrylate) resin

Meng

Leng

et al. 2019

Polymers for Advanced Techs

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A novel inorganic and organic composite flame retardant (9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide [DOPO]–layered double hydroxide [LDH]) was synthesized via grafting DOPO with organic‐modified Mg/Al‐LDH, which was introduced into poly (methyl methacrylate) (PMMA) resin to prepare the flame‐retardant PMMA composites. Thermogravimetric analyzer (TGA) showed that the T‐50% of DOPO‐LDH/PMMA composites enhanced by about 20°C, and with the 20% flame retardant, the residual char content can be increased by 39.8% in the air atmosphere compared with LDH/PMMA composites. In the UL‐94 and the limiting oxygen index (LOI) tests, it can be found that compared with LDH/PMMA composites, the LOI value of DOPO‐LDH/PMMA composites were raised evidently with the increased flame retardants, and the droplet combustion was greatly improved. These results could be ascribed to the action of DOPO free‐radical, catalytic charring of polymer and the effect of LDH physical barrier. Moreover, the novel DOPO‐LDH not only given PMMA a good flame‐retardant property and thermal stability, but also have higher visible light transmittance, ultraviolet‐shielding effect, and low loss of mechanical properties, which could further facilitate the wide application of inorganic environment‐friendly flame retardants in general resins and engineering resins and broaden the application of polymers.

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Section: Resultsmentioning

confidence: 62%

A flame‐retardant DOPO‐MgAl‐LDH was prepared and applied in poly (methyl methacrylate) resin

Meng

Leng

et al. 2019

Polymers for Advanced Techs

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“…In the case of MgCr-LDH/NS, the strong and broad band located at exactly 3400 cm −1 corresponds to the superposition of –OH stretching mode of vibrations, underneath the subsistence of –OH functional group of metal hydroxide layers 16 , 21 , 83 . The extremely weak broad band located at approximately 3000 cm −1 is accredited to the existence of hydrogen bonds among H 2 O molecules residing in the interlayer and –OH group of metal hydroxide layers 84 . In addition; an additional absorption band at 1642 cm −1 corresponds to the deformation of H 2 O molecules 85 .…”

Section: Resultsmentioning

confidence: 99%

Superlative photoelectrochemical properties of 3D MgCr-LDH nanoparticles influencing towards photoinduced water splitting reactions

Nayak

Parida

2022

Sci Rep

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In the present work, we report the synthesis of single system three-dimensional (3D) open porous structure of MgCr-LDH nanoparticles in a substrate-free path by using one-step formamide assisted hydrothermal reaction followed by visible light irradiation for significant photoelectrochemical (PEC) properties that manifest towards photocatalytic H2 and O2 production. The as-prepared nanostructured materials were characterized by various physico-chemical characterization techniques. Moreover, this unique synthetic approach produces 3D open porous network structure of MgCr-LDH nanoparticles, which were formed by stacking of numerous 2D nanosheets, for effective light harvestation, easy electronic channelization and unveil superlative PEC properties, including high current density (6.9 mA/cm2), small Tafel slope of 82 mV/decade, smallest arc of the Nyquist plot (59.1 Ω cm−2) and photostability of 6000 s for boosting water splitting activity. In addition, such perfectly self-stacked 2D nanosheets in 3D MgCr-LDH possess more surface active defect sites as enriched 50% oxygen vacancy resulting a good contact surface within the structure for effective light absorption along with easy electron and hole separation, which facilitates the adsorption of protons and intermediate for water oxidation. Additionally, the Cr3+ as dopant pull up the electrons from water oxidation intermediates, thereby displaying superior photocatalytic H2 and O2 production activity of 1315 μmol/h and 579 μmol/h, respectively. Therefore, the open 3D morphological aspects of MgCr-LDH nanoparticles with porous network structure and high surface area possess more surface defect sites for electron channelization and identified as distinct novel features of this kind of materials for triggering significant PEC properties, along with robustly enhance the photocatalytic water splitting performances.

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“…3e); the as-prepared optical diffuser can obtain high transmittance (86%) and high haze (88%) as the concentration of the filler is over 15 wt%. 30,31 To improve the optical properties of the silica/UV-cured polymer composite films by the two steps of sol–gel silica coating around the template and acid dissolution removal of the template, Suthabanditpong et al have synthesized the hollow silica nanoparticles via the inorganic particle template method that involves the removal of the core-template by acid dissolution; the prepared hollow silica nanoparticles with a hierarchical structure within the composite film improves the total transmittance and the diffusing ability of the silica/polymer composite film. 32 Wang et al have provided an approach for fabricating optical diffusers based on silicone emulsions, which consist of silicone polymer and aq.…”

Section: Theory and Measurementsmentioning

confidence: 99%

A comprehensive review of optical diffusers: progress and prospects

2023

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In situ hydrothermal synthesis of polysiloxane@3D flower-like hollow Mg Al LDH microspheres with superior light diffusing properties for optical diffusers

Cited by 20 publications

References 54 publications

A flame‐retardant DOPO‐MgAl‐LDH was prepared and applied in poly (methyl methacrylate) resin

A flame‐retardant DOPO‐MgAl‐LDH was prepared and applied in poly (methyl methacrylate) resin

Superlative photoelectrochemical properties of 3D MgCr-LDH nanoparticles influencing towards photoinduced water splitting reactions

A comprehensive review of optical diffusers: progress and prospects

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