Effect of boron doping on waterproof and dielectric properties of polyborosiloxane coating on SiO2f/SiO2 composites

Xia, Long; Lu, Siru; Zhong, Bo; Huang, Ling; Yang, Hua; Zhang, Tao; Han, Hongliang; Wang, Pan; Li, Xiong; Wen, Guangwu

doi:10.1016/j.cja.2018.11.008

Cited by 14 publications

(6 citation statements)

References 38 publications

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“…The TEOS surface has also shown a hydrophilic character with a contact angle value of 65° . In addition, the B effect in the structure is caused by a decrease in the contact angle due to the attractive force between oxygen atoms with unshared electron pairs in the water and B atoms with an empty p orbit . The wettability, porosity, and swelling capacity of the B-Si Col-HK cryogels have implied that the next-generation cryogels are expected to be used in bone tissue engineering applications …”

Section: Resultsmentioning

confidence: 63%

“…14 In addition, the B effect in the structure is caused by a decrease in the contact angle due to the attractive force between oxygen atoms with unshared electron pairs in the water and B atoms with an empty p orbit. 57 The wettability, porosity, and swelling capacity of the B-Si Col-HK cryogels have implied that the next-generation cryogels are expected to be used in bone tissue engineering applications. 32 SEM micrographs at 50× and 250× magnifications of Col-HK and B-Si-Col-HK are given in Figure S5A,B.…”

Section: Physicochemical Evaluationsmentioning

confidence: 99%

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Synthesis of Silica-Based Boron-Incorporated Collagen/Human Hair Keratin Hybrid Cryogels with the Potential Bone Formation Capability

Cal

Arslan

Derkuş

et al. 2021

ACS Appl. Bio Mater.

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Tissue engineering and regenerative medicine have evolved into a different concept, the so-called clinical tissue engineering. Within this context, the synthesis of next-generation inorganic–organic hybrid constructs without the use of chemical crosslinkers emerges with a great potential for treating bone defects. Here, we propose a sophisticated approach for synthesizing cost-effective boron (B)- and silicon (Si)-incorporated collagen/hair keratin (B-Si-Col-HK) cryogels with the help of sol–gel reactions. In this approach, collagen and hair keratin were engaged with a B-Si network using tetraethyl orthosilicate as a silica precursor, and the obtained cryogels were characterized in depth with attenuated total reflectance-Fourier transform infrared spectroscopy, solid-state NMR, X-ray diffraction, thermogravimetric analysis, porosity and swelling tests, Brunauer–Emmett–Teller and Barrett–Joyner–Halenda analyses, frequency sweep and temperature-dependent rheology, contact angle analysis, micromechanical tests, and scanning electron microscopy with energy dispersive X-ray analysis. In addition, the cell survival and osteogenic features of the cryogels were evaluated by the MTS test, live/dead assay, immuno/histochemistry, and quantitative real-time polymerase chain reaction analyses. We conclude that the B-Si-networked Col-HK cryogels having good mechanical durability and osteoinductive features would have the potential bone formation capability.

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Section: Resultsmentioning

confidence: 63%

Section: Physicochemical Evaluationsmentioning

confidence: 99%

Synthesis of Silica-Based Boron-Incorporated Collagen/Human Hair Keratin Hybrid Cryogels with the Potential Bone Formation Capability

Cal

Arslan

Derkuş

et al. 2021

ACS Appl. Bio Mater.

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“…The B 1s peak region revealed the B–O–Si and B–OH bond existence at the surface of the PBS sample. 10 , 21 The C 1s peak area of the PBS-2 sample proved the presence of three chemical states, corresponding to C–Si, C–C/C=C, and C–O bonds. Two binding energies were observed at 532.22 and 533.65 eV, attributed to Si–OH and Si–O–Si bonds, respectively, for the O 1s peak ( Figure S7 ).…”

Section: Resultsmentioning

confidence: 94%

“…In the spectrum, it was observed that the PBS-2 sample surface consists of O, C, B, and Si with binding energies of O 1s, C 1s, B 1s, Si 2s, and Si 2p at 533.1, 284.5, 191.63, 153, and 102 eV, respectively. The B 1s peak region revealed the B–O–Si and B–OH bond existence at the surface of the PBS sample. , The C 1s peak area of the PBS-2 sample proved the presence of three chemical states, corresponding to C–Si, C–C/CC, and C–O bonds. Two binding energies were observed at 532.22 and 533.65 eV, attributed to Si–OH and Si–O–Si bonds, respectively, for the O 1s peak (Figure S7).…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Core–Shell Polyborosiloxanes as a Heat-Resistant Platform

Gunes

Karagöz

2022

ACS Omega

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Herein, new polyborosiloxanes (PBSs) were prepared using a straightforward synthetic approach to obtain a core–shell structure as a material with various features such as better adhesion ability to the applied surface and enhanced thermal properties. In this concept, in situ core–shell formation was allowed by sequential addition of ingredients with fixed conversions. First, pre-condensed polysiloxane was synthesized, with a 60% conversion, as a core by the reaction of phenyltriethoxysilane in the presence of water in an acidic condition. Subsequent addition of boric acid into the pre-condensate and a further condensation reaction resulted in the formation of the shell layer through the introduction of the −Si–O–B– bonds to the network of the PBS. The resulting resin was used as a binder for heat-resistant paint in combination with an aluminum pigment, and the paint applied on a metal plate was found to be resistant up to 600 °C in terms of adhesion strength. It was also demonstrated that the incorporation of boron in the core–shell structure showed better adhesion strength than the one-pot preparation of PBS. Using this method, not only the heat resistance requirement of the industrial coating was achieved but also the flame-retardant ability was introduced.

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“…The Si/C and Si/O atomic ratios of unmodified neat PUF surface are 0.08 and 0.25, respectively. In contrast, the Si/C and Si/O atomic ratios of PUF-20pbw surface are increased to 0.86 and 1.94, respectively (table 1), which suggests the abundant Si-O-Si bonds in STG increase the relative intensity of Si on the surface of PUF and weaken the relative intensity of other elements [34,35].…”

Section: Surface Group Analysesmentioning

confidence: 99%

Effect of shear thickening gel on structure and properties of flexible polyurethane foam

Liu¹,

Yu²,

Sun³

et al. 2021

Smart Mater. Struct.

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Compression and low-velocity impact properties of shear thickening gel/polyurethane foam (STG/PUF), a soft protective material, have been reported. In order to have a deeper understanding of the relationship between the structure and properties of this material, we utilized Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and Proton nuclear magnetic resonance (1H-NMR) to study and prove that STG and polyurethane (PU) did not produce new chemical bonds during the blending process, which belongs to physical blending. Because the molecular chains of STG and PU are intertwined, the composites are endowed with higher thermal stability, safety protection performance, and shape memory performance. For instance, Young’s modulus (E) of the STG/PUF was automatically increased by 57% when stimulated by external forces at different rates and the Emax over 200 kPa, demonstrating a pronounced shear thickening effect. Shape memory tests showed that the shape fixity ratio of STG/PUF gradually increases with the increase of STG content, and the shape recovery ratio remained at 100%. More importantly, the STG/PUF was flexible and comfortable, had excellent mechanical properties and a longer service life, and can be extended to various human protective equipment.

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Effect of boron doping on waterproof and dielectric properties of polyborosiloxane coating on SiO2f/SiO2 composites

Cited by 14 publications

References 38 publications

Synthesis of Silica-Based Boron-Incorporated Collagen/Human Hair Keratin Hybrid Cryogels with the Potential Bone Formation Capability

Synthesis of Silica-Based Boron-Incorporated Collagen/Human Hair Keratin Hybrid Cryogels with the Potential Bone Formation Capability

Synthesis of Core–Shell Polyborosiloxanes as a Heat-Resistant Platform

Effect of shear thickening gel on structure and properties of flexible polyurethane foam

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