大片径氧化石墨烯浆料制备及流变性研究
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摘要
以鳞片石墨为原料,通过酸氧化法制备氧化石墨烯(GO)。研究了GO的尺寸大小、分布及GO浆料质量浓度对流变性和液晶形态的影响。结果表明:采用500μm鳞片石墨制备GO具有较大片径,平均尺寸为38μm;随着GO质量浓度的增加,GO浆料黏度增大,液晶形态更明显,且为典型的非牛顿流体。GO浆料质量浓度高于10 mg/mL后,PVI值小于0.1。
Graphene oxide(GO) was prepared from flake graphite by chemical oxidation method. The effects of size, distribution and mass concentration of GO slurry on its rheology and liquid crystal morphology were investigated. The results showed that giant GO prepared from 500 μm graphite flakes had giant sheet diameter, which was 38 μm. With the increase of GO mass concentration, GO slurry viscosity increased and its morphology of liquid crystal was more obvious, which was a typical non-Newtonian fluid. When the concentration of GO slurry was higher than 10 mg/mL, the PVI value was less than 0.1.
Graphene oxide(GO) was prepared from flake graphite by chemical oxidation method. The effects of size, distribution and mass concentration of GO slurry on its rheology and liquid crystal morphology were investigated. The results showed that giant GO prepared from 500 μm graphite flakes had giant sheet diameter, which was 38 μm. With the increase of GO mass concentration, GO slurry viscosity increased and its morphology of liquid crystal was more obvious, which was a typical non-Newtonian fluid. When the concentration of GO slurry was higher than 10 mg/mL, the PVI value was less than 0.1.
引文
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[4]CAO J,WANG C.Multifunctional surface modification of silk fabric via graphene oxide repeatedly coating and chemical reduction method[J].Applied Surface Science,2017,405:380-388.
[5]胡希丽.石墨烯层层自组装功能纺织品制备及其性能研究[D].青岛:青岛大学,2016
[6]许佳,周翔,邢志奇.棉织物的六氯环三磷腈改性氧化石墨烯阻燃整理[J].印染,2016(16):6-11,18.
[7]XIANG C,YOUNG C C,WANG X,et al.Large flake graphene oxide fibers with unconventional 100%knot efficiency and highly aligned small flake graphene oxide fibers[J].Advanced Materials,2013,25(33):4 592-4 597.
[8]CHEN L,HE Y,CHAI S,et al.Toward high performance graphene fibers[J].Nanoscale,2013,13(5):5 809-5 815.
[9]JALILI R,ABOUTALEBI S H,ESRAFILZADEH D,et al.Graphene oxide:scalable one-step wet-spinning of graphene fibers and yarns from liquid crystalline dispersions of graphene oxide:towards multifunctional textiles[J].Advanced Functional Materials,2013,43(23):5 345-5 354.
[10]COTE L J,KIM J,ZHANG Z,et al.Tunable assembly of graphene oxide surfactant sheets:wrinkles,overlaps and impacts on thin film properties[J].Soft Matter,2010,24(6):6 096-6 101.
[11]KIM Y S,KANG J H,KIM T,et al.Easy preparation of readily self-assembled high-performance graphene oxide fibers[J].Chemistry of Materials,2014,26(19):5 549-5 555.
[12]LI W,LI F,LI H,et al.Flexible circuits and soft actuators by printing assembly of graphene[J].ACS Applied Materials&Interfaces,2016,19(8):12 369-12 376.
[13]DAN B,BEHABTU N,MARTINEZ A,et al.Liquid crystals of aqueous,giant graphene oxide flakes[J].Soft Matter,2011,23(7):11 154-11 159.
[14]ZHOU C E,ZHANG Q,KAN C W.Rheological properties of thickener for preparing digital printing ink for nylon carpets[J].Fibers&Polymers,2016,17(9):1 475-1 479.