Graphene/phenolic resin composite material and purpose thereof
A phenolic resin and composite material technology, applied in the field of new materials, can solve the problem that the mechanical properties and wear resistance of graphite oxide/phenolic resin in-situ composites are not suitable for industrial production, and the mechanical properties and wear resistance of graphite oxide/phenolic resin in-situ composites have not been greatly improved, and the scope of application is limited. problem, to achieve the effect of simple and feasible modification method, good dispersion stability and uniformity, and expansion of the scope of use
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[0021] Example 1:
[0022]A preparation method of a graphene / phenolic resin composite material. The graphene and phenolic resin with a weight ratio of 0.02:100 are melt blended, and the melt blending extrusion temperature is 140 ° C. After adding fillers and mixing uniformly, the open plastic Mixing on the mill, crushing the material after mixing, molding at a temperature of 165°C and a pressure of 6MPa to prepare a composite material, and then following the curing procedure: 118°C for 2.5h, 138°C for 2.5h, 158°C for 2.5h , and cured at 178°C for 2.5 hours to obtain a surface-modified graphene oxide composite material. Due to the dehydration condensation of KH550 and the hydroxyl groups on GO, the modified GO has reduced hydrophilic groups and enhanced lipophilicity, which can effectively improve the interface interaction between GO and PF matrix, and improve the dispersion of GO in PF, so that The mechanical properties of the PF composite are improved, which can effectively ...
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[0028] Example 2:
[0029] A preparation method of a graphene / phenolic resin composite material, melt blending graphene and phenolic resin with a weight ratio of 0.5:100, the melt blending extrusion temperature is 135 ° C, adding fillers and mixing evenly, in an open plastic Mixing on the mill, crushing the material after mixing, molding at a temperature of 168°C and a pressure of 5MPa to prepare a composite material, and then following the curing procedure: 120°C for 2h, 140°C for 2h, 160°C for 2h, and 180°C After 2 hours of solidification, the surface-modified graphene oxide composite material is obtained.
[0030] The addition amount of the curing accelerator is 0.68% of the weight of the phenolic resin, and the molar ratio of propylene carbonate, diisocyanate and octadecanoic acid in the curing accelerator is 1:1.45:0.025.
[0031] Graphene is surface-modified graphene oxide, and the modification method of graphene is: add graphene oxide into KH550 solution with a concent...
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[0039] Example 3:
[0040] Composite Mechanical Properties Test
[0041] Impact performance test: The sample size is 80mm×10mm×4mm, and the test is carried out according to GB / T 1043.1-2008.
[0042] Bending performance test: test speed 2mm / min, span 64mm, test according to GB / T 9341-2008.
[0043] Friction and wear properties: Tested according to GB 5763-2008, the sample size is 25mm×25mm×5mm, the friction of the sample at 100, 150, 200, 250, 300°C is measured at a speed of 480r / min and a compression force of 0.98MPa Coefficient and wear mass loss. Among them, volumetric wear rate ∆V=1.73×[∆WId·μ F ],10 -7 cm 3 / (N m); Decay rate F=[(μ F100℃ -μ F250℃ ) / μ F100℃ ]×100%, recovery rate R=(μ R100℃ / μ F100℃ )×100%.
[0044] Morphology of the worn surface: After spraying gold on the worn surface of the sample, the worn surface was analyzed with a scanning electron microscope.
[0045] Creep performance: sample size 30mm×10mm×3mm, temperature 180°C, practice for 120min. ...
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