Facile preparation of Cross-linked polyester composite rubber with excellent mechanical strength and high toughness by loading adjustable Low-cost clay

Cong, Riyao; Wang, Muqun; Cao, Wenhao; Li, Zequan; Zhao, Shuangliang; Zhang, Zhichao; Gao, Yi; Liu, Ming; Zhang, Jianhui; Xie, Xiaoying; Liang, Shaojun; Gao, Wei

doi:10.1016/j.cej.2022.140794

Cited by 7 publications

(4 citation statements)

References 65 publications

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“…To observe the chemical bond composition of L-CDs in more detail, XPS was performed. Figure f shows the XPS spectrum of the L-CDs, which shows four representative peaks of S2p (169 eV), C1s (285 eV), N1s (400 eV), and O1s (532 eV) . The C1s peak was decomposed into four peaks in the high-resolution spectra (Figure S1a); CC/C–C (284 eV), C–N (285 eV), C–O (286 eV), and CO (288 eV) were observed.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 1f shows the XPS spectrum of the L-CDs, which shows four representative peaks of S2p (169 eV), C1s (285 eV), N1s (400 eV), and O1s (532 eV). 42 The C1s peak was decomposed into four peaks in the high-resolution spectra (Figure S1a); C�C/C−C (284 eV), C−N (285 eV), C−O (286 eV), and C�O (288 eV) were observed. When C�C and C�O are jointly present in the structures of the CDs, n−π* transition corresponding to the higher binding energy of C�O is more likely to be the main electron transition channel for electrons, 43,44 which is an important contribution to the exploration of the fluorescence mechanism of CDs.…”

Section: The Morphology and Chemical Composition Of L-cdsmentioning

confidence: 99%

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Lignin-Derived Carbon Dots with Triple Emission Peaks for Lighting Modules and Backlight Display

Zhao

Liang

et al. 2023

ACS Appl. Nano Mater.

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White light-emitting diodes (WLEDs) have attracted a lot of attention for their small size, low energy consumption, and fast response time. However, developing a green material to replace the non-renewable rare earths in the preparation of WLEDs remains a big challenge at present. Here, biomass carbon dots (CDs) are compounded with polyvinyl alcohol (PVA) to obtain a solid fluorescent material that can replace rare earth phosphors for the preparation of WLEDs. Lignosulfonate CDs (L-CDs) prepared using sodium lignosulfonate as the carbon source show a unique characteristic of triple emission peaks under ultraviolet excitation. L-CDs@PVA prepared by combining CDs with PVA can overcome the aggregation-induced quenching (AIQ) effect and exhibit white fluorescence under ultraviolet (UV) due to supramolecular cross-linking. Chromaticity coordinate (CIE) analysis shows that the light coordinates emitted by L-CDs@PVA (0.297, 0.318) are very close to the standard white light coordinates (0.330, 0.330). The WLEDs were prepared by using L-CDs@PVA as a white light conversion layer, and finally, the lighting modules and backlight modules were assembled in surface mount technology for illumination and display. The cross-combination of optical materials and bioenergy has a positive effect on sustainable development.

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Section: Resultsmentioning

confidence: 99%

Section: The Morphology and Chemical Composition Of L-cdsmentioning

confidence: 99%

Lignin-Derived Carbon Dots with Triple Emission Peaks for Lighting Modules and Backlight Display

Zhao

Liang

et al. 2023

ACS Appl. Nano Mater.

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“…Meanwhile, in the 13 2e shows four peaks at 284.8, 399.8, 531.8, and 163.8 eV, indicating that U-CDs are composed of C, N, O, and S elements, and the atomic ratios are calculated to be 71.44%, 1.97%, 19.49%, and 7.1%, respectively. As shown in Figure 2f, the high-resolution XPS spectra of the C 1s band are separated into three peaks at 284.8, 286.4, and 288.9 eV, which are attributed to C−C/C�C, C−N, and C�O, 35 respectively. The O 1s spectrum (Figure 2g) shows two states of oxygen, C�O at 532 eV and C−O at 533.42 eV.…”

Section: Aggregation State Caused By Carbon Dotmentioning

confidence: 98%

Hydrophobic Carbon Dots with Aggregation-Induced Emission for Multistage Anticounterfeiting

Mao,

Zhao,

et al. 2023

ACS Appl. Nano Mater.

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Anticounterfeiting work has always been a key work related to people's interests, and fluorescent anticounterfeiting labels are more common. However, the current anticounterfeiting model of fluorescent anticounterfeiting markers is relatively simple and easy to copy. It is urgent to develop anticounterfeiting markers with better anticounterfeiting ability. To this end, we prepared fluorescent carbon dots (CDs) with an aggregation-induced emission (AIE) effect in one step using 2,2-dithiodibenzoic acid (DTSA) and a urea hot solvent. Blue fluorescence at 475 nm is emitted under ultraviolet excitation in the dispersed state, while orange-red fluorescence at 618 nm is emitted in the aggregated state. The two states' fluorescence quantum yields and fluorescence lifetimes are 7.4%, 1.94 ns and 19.6%, 1.61 ns, respectively, with good crystallization properties. At the same time, due to the dehydration reaction of its carboxyl group and amino group, the consumption of a large number of carboxyl and amino groups makes it aggregate in aqueous solution, while it is dispersed in lower-polarity solvents, such as acetic acid and ethanol. The conversion of the two states can make its fluorescence change, and so a solvent-dependent multilevel anticounterfeiting ink is designed, which can be used for multilevel anticounterfeiting and information encryption.

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“…[32][33][34][35] It is important to note that crack closure is a prerequisite for the subsequent healing process. 36 Many reported selfhealing materials require external forces to force the fractured surface backward to achieve physical contact on the damaged surface, which is difficult to realize in practical applications. 37 To address these challenges, shape memory behavior has been introduced into self-healing materials to assist the self-healing process by facilitating crack closure.…”

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confidence: 99%

Synthesis of Diels–Alder bond and hydrogen bond synergistic shape memory self‐healing polyurethane elastomers

Zhang,

Wang,

Cao

et al. 2023

J of Applied Polymer Sci

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Self‐healing materials exhibit the ability to repair damage and restore their function. Shape memory assisted self‐healing (SMASH) materials are smart materials that automatically close localized microscopic cracks and repair these cracks by bonding damaged surfaces. A novel temperature‐responsive SMASH polymer composite was established by introducing Diels–Alder bonds (D–A) in polyurethane. In this article, dynamic D–A produced by the polymerization of furfurylamine and 4,4’‐bismaleimidodiphenylmethane was introduced into the molecular chain to enable the polyurethane elastomers containing D–A bonds to acquire self‐repairing capability. The self‐healing properties of the synthesized material were examined using polarized light microscopy, which revealed excellent fracture healing. The mechanical properties before and after healing were tested, in which the initial maximum tensile strength of the material could reach 7.9 MPa, and the maximum tensile strength after self‐healing was 7.3 MPa, with a repair rate of 91.8%; the maximum elongation was 585.9%, and the maximum elongation after self‐healing was 469.5%, with a repair rate of 80.1%. In addition, this material has excellent repair performance for microcracks of different scales, and the micromolten part of the surface after heating can fill the micrometer cracks, play the role of antiaging, and extend the service life of the material.

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Facile preparation of Cross-linked polyester composite rubber with excellent mechanical strength and high toughness by loading adjustable Low-cost clay

Cited by 7 publications

References 65 publications

Lignin-Derived Carbon Dots with Triple Emission Peaks for Lighting Modules and Backlight Display

Lignin-Derived Carbon Dots with Triple Emission Peaks for Lighting Modules and Backlight Display

Hydrophobic Carbon Dots with Aggregation-Induced Emission for Multistage Anticounterfeiting

Synthesis of Diels–Alder bond and hydrogen bond synergistic shape memory self‐healing polyurethane elastomers

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