Polymer, Год журнала: 2024, Номер 315, С. 127852 - 127852
Опубликована: Ноя. 15, 2024
Язык: Английский
Surfaces and Interfaces, Год журнала: 2025, Номер unknown, С. 106419 - 106419
Опубликована: Апрель 1, 2025
Язык: Английский
Процитировано
0
Опубликована: Янв. 1, 2024
Язык: Английский
Процитировано
1
Progress in Organic Coatings, Год журнала: 2024, Номер 196, С. 108691 - 108691
Опубликована: Июль 29, 2024
Язык: Английский
Процитировано
1
Опубликована: Янв. 1, 2024
Novel bio-based waterborne polyurethane (CWPU) sizing agents originating from renewable vegetable oils have received considerable attentions for improving interfacial adhesion of carbon fibre-reinforced epoxy resin (CF/EP) composites. However, CWPU prepared castor oil (CO) as soft-segments had suffered drawbacks such lower adhesion, poorer thermal and mechanical properties, which limited the scope application. Herein, a cross-linker (IETT) with functional tri-acrylate branched tri-isocyanate chain-endings was synthesized used to prepare hyperbranched CO-acrylate-isocyanate interpenetrating cross-linking networks. displayed excellent storage stability resistance, decomposition temperatures 271.8 °C T5%. imparted wettability CF through oxygen-containing polar groups structures, resulting in an increase fibre surface energy 70.9 mN/m. Stable robust interphases were constructed CF/EP composites by "polar similarity compatibility" multiple physico-chemical reactions. The flexural strength, interlaminar shear strength CWPU-CF/EP increased 54.2%, 33.2% 36.3%, respectively, compared unsized composite. research contributes development industrial production high-performance, environmentally friendly agents.
Язык: Английский
Процитировано
0
Опубликована: Янв. 1, 2024
Wholly bio-based waterborne polyurethane (CWPU) sizing agents prepared by replacing traditional petroleum-based petrochemical products with natural renewable bio-extracts and crop-derivatives are attracting the attentions in carbon fibre (CF)-reinforced epoxy (EP) composites industries. However, CWPU solely using reagents comprising castor oil (CO), L-lysine diisocyanate, gallic acid (GA) suffered from disadvantages of low thermodynamic properties. For enhancing adhesion wettability agents, diaminosulphonates (AAS) excellent hydrophilicity polarity were introduced into hyperbranched side-chains backbone post chain-extension method addition to GA as a former chain-extender cross-linker. Sulfonated-CWPU (SWPU) revealed favourable thermal stability achieving T5% decomposition temperature toughness 293.8 °C 37.3 MJ/m3. The polar interactions oxygen-containing reactive groups SWPU together synergistic effects SO3-Na+-strengthened hydrogen-bonding CO-GA cross-linking networks significantly enhanced surface energy (70.9 mN/m), roughness tensile strength (5.8 GPa) CF filaments. Concomitantly, constructed robust stable interphase CF/EP through "polar similarity compatibility" multiple physico-chemical reactions between carbamate, sulphonate groups. flexural strength, interlaminar interfacial shear SWPU-CF/EP increased 66.4%, 56.4% 41.8%, respectively, compared unsized composites. approach may contribute development high-performance eco-friendly new-energy vehicles high-speed railway
Язык: Английский
Процитировано
0
Polymer, Год журнала: 2024, Номер 315, С. 127852 - 127852
Опубликована: Ноя. 15, 2024
Язык: Английский
Процитировано
0