Thermal-oxidative effect of a co-condensed nanosilica-based antioxidant in polypropylene

Tang, Hanying; Liu, Peng; Lu, Ming; Ding, Yanfen; Wang, Feng; Gao, Chong; Zhang, Shimin; Yang, Mingshu

doi:10.1016/j.polymer.2017.02.029

Cited by 36 publications

(16 citation statements)

References 47 publications

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“…In addition, it was reported that polyphenols interact with some proteins, reducing their antioxidant activity [ 29 ]. To alleviate these problems, some authors used them co-condensed on silica particles [ 30 ] or simply adsorbed [ 31 ]. However, the interactions between the antioxidant molecules themselves and between the antioxidants and the silica surface can reduce their antioxidant activity, depending on the moiety or molecular scaffold involved [ 30 , 31 , 32 , 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

Antioxidant Nanomaterial Based on Core–Shell Silica Nanospheres with Surface-Bound Caffeic Acid: A Promising Vehicle for Oxidation-Sensitive Drugs

et al. 2019

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The design of efficient, biocompatible, and easily prepared vehicles for drug delivery is a subject of great interest for medicine and pharmaceutical sciences. To achieve the above goals, surface functionalization is critical. Here, we report a hybrid nanocarrier consisting of core–shell silica nanospheres and the antioxidant caffeic acid linked to the surface, to evaluate their in vitro antioxidant capacity, their capability to protect oxidation-sensitive compounds incorporated in nanoparticles, and to study the interaction with bovine serum albumin protein. The results show that the radical-scavenging activity of immobilized caffeic acid is attenuated in the silica nanospheres; however, other antioxidant properties such as Fe2+-chelating activity and singlet oxygen quenching are enhanced. In addition, caffeic acid is protected from binding to proteins by the nanoparticle, suggesting that this nanosystem is more likely to maintain the antioxidant activity of caffeic acid in biological media. Finally, the natural antioxidant barrier on the nanocarrier is able to delay the degradation of a compound incorporated into this nanovehicle. Considering all findings, this work proposes a suitable tool for pharmaceutical and cosmetic industries as an antioxidant nanocarrier for oxidation-sensitive drugs.

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Section: Introductionmentioning

confidence: 99%

Antioxidant Nanomaterial Based on Core–Shell Silica Nanospheres with Surface-Bound Caffeic Acid: A Promising Vehicle for Oxidation-Sensitive Drugs

et al. 2019

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“…More importantly, two new peaks occurred at 2971 and 2887 cm −1 , which represented the stretching and bending vibration of −CH 2 from the APTMS residue. 56 XPS was employed to further analyze the surface chemical composition of SiO 2 −OH and SiO 2 −NH 2 , and the results are shown in Figure 5b. The typical peaks of C 1s, O 1s, Si 2s, and Si 2p at binding energies of 284, 532, 154, and 103 eV, respectively, were all detected in the spectra of SiO 2 −OH and SiO 2 −NH 2 .…”

Section: Resultsmentioning

confidence: 99%

Nondestructive Strategy to Effectively Enhance the Interfacial Adhesion of PBO/Epoxy Composites

et al. 2020

ACS Appl. Mater. Interfaces

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Low interfacial adhesion seriously limits the wide application of PBO fiber in composites. To solve this problem, a novel hierarchical reinforcement strategy was developed by introducing epoxy sizing, nanoreinforcement of amino-functionalized silicon dioxide (SiO 2 −NH 2 ), and an interfacial compatibilizer of 2,6-bis(2-hydroxy-4aminophenyl) benzobisoxazole (HABO) onto poly(p-phenylene benzobisoxazole) (PBO) fibers via a facile dip-coating approach. SiO 2 −NH 2 and HABO were uniformly dispersed in epoxy sizing, forming an active interface layer. On this basis, wettability, surface roughness of the PBO fiber, and compatibility with the resin matrix were significantly improved, which gave 88.4 and 40.4% enhancement in the interfacial shear strength and interlaminar shear strength of the corresponding composites, respectively. Moreover, it should be noted that the outstanding mechanical and thermal properties of the PBO fiber were not impaired during the sizing treatment. In summary, our work provides an effective and damage-free approach to improve the interfacial adhesion of PBO/epoxy composites.

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“…In the studies mentioned above, silica nanoparticles were firstly modified with aminosilane. In order to reduce the use of toxic organic solvent and increase the loading of functional groups, Tang et al . synthesized amino‐functionalized silica (SN‐NH 2 ) by the co‐condensation of tetraethoxysilane (TEOS) and aminopropyltriethoxysilane (Fig.…”

Section: Nanosilica‐immobilized Antioxidantsmentioning

confidence: 99%

Synthesis of nanoparticle‐immobilized antioxidants and their antioxidative performances in polymer matrices: a review

Liu

Wang

et al. 2018

Polymer International

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Antioxidants are used to improve the thermo-oxidative stability of polymers during processing and to prolong the service life of polymer materials. Immobilizing antioxidants onto nanoparticles is one of the approaches for reducing their physical losses. Research on the design, synthesis and application of nanoparticle-immobilized antioxidants is reviewed in this article. These kinds of 'nano-antioxidants' reveal good resistance against extraction and show good antioxidative efficiency during long-term thermal aging, and therefore will have great potential in practical use for improving the stability of polymer materials.

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Thermal-oxidative effect of a co-condensed nanosilica-based antioxidant in polypropylene

Cited by 36 publications

References 47 publications

Antioxidant Nanomaterial Based on Core–Shell Silica Nanospheres with Surface-Bound Caffeic Acid: A Promising Vehicle for Oxidation-Sensitive Drugs

Antioxidant Nanomaterial Based on Core–Shell Silica Nanospheres with Surface-Bound Caffeic Acid: A Promising Vehicle for Oxidation-Sensitive Drugs

Nondestructive Strategy to Effectively Enhance the Interfacial Adhesion of PBO/Epoxy Composites

Synthesis of nanoparticle‐immobilized antioxidants and their antioxidative performances in polymer matrices: a review

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