Synthesis and structure evolution of phenolic resin/silicone hybrid composites with improved thermal stability

Yun, Jin Han; Chen, Lixin; Zhang, Xiaofei; Zhao, Hui; Wen, Ziyou; Zhu, Defu

doi:10.1007/s10853-018-2384-3

Cited by 42 publications

(27 citation statements)

References 68 publications

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“…The 13 C NMR signals 6 and 7 of the methylene group CH 2 (C Aryl ) 2 at 30-40 ppm as well as the aromatic carbon atoms 2-5 at 110-140 ppm (C Aryl ) and signal 1 at 155 ppm (C Aryl OH), respectively, are assigned to the phenolic resin moiety. 44,45 Signals 4 and 5 show substitution of the aromatic ring in ortho-or para-position in all cases. The 13 C NMR signal a at 65 ppm shows the presence of CH 2 O functionalities as an indication for incomplete polymerization or side products like ether structures.…”

Section: Hybrid Materials Synthesis and Characterizationmentioning

confidence: 86%

Textile functionalization by combination of twin polymerization and polyalkoxysiloxane‐based sol–gel chemistry

Kaßner

Zhu

Schaefer

et al. 2022

J of Applied Polymer Sci

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The surface modification of textile fibers by coating with nanostructured organic–inorganic hybrid materials is presented. The hydrophobic, solvent resistant and mechanically robust coatings were produced by combining the twin monomer 2,2′‐spirobi[benzo‐4H‐1,3,2‐dioxasiline] (TM) and polyalkoxysiloxanes (silica precursor polymers) in a catalyzed polymerization process. For the application in textile finishing, both aqueous emulsions and ethanolic solutions of mixtures were developed. The precisely adjusted ratio of TM and polyalkoxysiloxanes enabled controlling of the organic and inorganic portions in the hybrid layer. The polymerization process can be advantageously combined with the ring‐opening polymerization of hexamethylcyclotrisiloxane (HMCTS). The resulting ethanolic twin prepolymer solutions and the polyethoxysiloxane emulsions were easy to handle and thus represent a novel and attractive binder for PET surfaces. The coated fabrics were analyzed by means of scanning electron microscopy and X‐ray photoelectron spectroscopy showing hybrid material formation as a homogeneous, sealed surface layer. Improved hydrophobicity as well as resistance to mechanical stress was proven by water droplet‐ and Martindale tests.

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Section: Hybrid Materials Synthesis and Characterizationmentioning

confidence: 86%

Textile functionalization by combination of twin polymerization and polyalkoxysiloxane‐based sol–gel chemistry

Kaßner

Zhu

Schaefer

et al. 2022

J of Applied Polymer Sci

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“…4, the peak at À36.37 ppm corresponded to the PhCH 3 Si(O-Si) 2 structure, and the peak at À69.31 ppm can be attributed to the Si-O-Ph and CH 3 Si(O-Si) 3 structures, based on analyses from previous literature reports. 36,37 Compared with the sample cured at 270 C, the peak at À69.31 ppm for the sample cured at 350 C was stronger, further indicating that the higher curing temperature increased the amount of formation of Si-O-Ph bonds. In addition, DSC curves of the three resins were obtained and the results are shown in Fig.…”

Section: Curing Behavior Of Silicone Resinsmentioning

confidence: 94%

“…According to previous reports, Si–O–C groups and phenol groups can directly undergo transesterification under thermal conditions. Li 36 and Yun 37 prepared silicone/phenolic resins containing a Si–O–Ph structure through the transesterification reaction of methyltrimethoxysilane or methyltriethoxysilane oligomers with the phenolic resin. The results showed that the formation of Si–O–Ph groups effectively protected the phenolic hydroxyl group from oxidation, improving its stability to thermal oxidation.…”

Section: Introductionmentioning

confidence: 99%

Study on the synthesis and thermal stability of silicone resins reinforced by Si–O–Ph cross-linking

et al. 2021

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“…Indeed, phenol-formaldehyde (PF) resin has been widely used as laminate adhesive attributing to its desirable characteristics, such as rapidly heat curing, [22] and strong adhesive properties. [23,24] Hence, based on the above, we developed a facile and efficient approach to fabricate high-strength delignified wood-based laminated composites (DWLCs) via delignified wood veneer percolated with different contents of PF resin, followed by densification. A comparison was also carried out between natural wood-based laminated composites (WLCs) and DWLCs to show the effect of partial delignification on the mechanical properties of the composites.…”

Section: Introductionmentioning

confidence: 99%

High‐strength wood‐based composites via laminated delignified wood veneers with different adhesive contents for structural applications

2022

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The processing of natural wood into a high‐performance wood‐based composite to broaden the potential applications of wood can be achieved by various techniques using bulk wood as a raw material. However, attention has seldom been paid to the use of wood veneers for preparing high‐performance structural materials. In this study, delignified birch veneers are used as raw materials to fabricate high‐strength delignified wood‐based laminated composites (DWLCs) with phenol‐formaldehyde (PF) resin as adhesive. The DWLCs with a PF resin content of 40% had high mechanical properties and displayed flexural and tensile stress of 405.8 and 324.4 MPa, respectively. The flexural and tensile stress are 1.24 and 1.21 times higher than those of natural wood‐based laminated composites (WLCs). And we confirmed that partial delignification could contribute to enhancing the mechanical properties of high‐strength wood‐based composites. By using scanning electron microscopy (SEM), and energy‐dispersive spectroscopy (EDS), the strengthening mechanisms of the high‐performance DWLCs were investigated. Due to both the surface of the cell lumen and cell walls being filled with PF resin, the wood microstructure was cured under high pressure so that the DWLCs were enhanced.

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Synthesis and structure evolution of phenolic resin/silicone hybrid composites with improved thermal stability

Cited by 42 publications

References 68 publications

Textile functionalization by combination of twin polymerization and polyalkoxysiloxane‐based sol–gel chemistry

Textile functionalization by combination of twin polymerization and polyalkoxysiloxane‐based sol–gel chemistry

Study on the synthesis and thermal stability of silicone resins reinforced by Si–O–Ph cross-linking

High‐strength wood‐based composites via laminated delignified wood veneers with different adhesive contents for structural applications

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