氧化石墨烯改性水性半合成液压支架用浓缩液的制备与性能

doi:10.16085/j.issn.1000-6613.2020-0870

摘要/Abstract

摘要：

通过化学法对氧化石墨烯（GO）中的羧基进行活化，然后在一定条件下使其与油酸三乙醇胺（MDLO）末端的羟基反应，制备GO接枝改性油酸三乙醇胺酯（MDLO-GO）；最后将水、KOH、EDTA混合均匀后再依次加入蓖钾皂、MDLO-GO、乳化剂及消泡剂等，制备得到GO接枝改性半合成液压支架用浓缩液（GO-HDSF）。红外光谱和X射线光电子能谱的测试结果表明GO被成功接枝到MDLO分子链上；此外，其他性能测试结果表明，随GO添加量增多GO-HDSF浓缩液黏度逐渐增大，且耐腐蚀性、润滑性逐渐提高；当GO的添加量为0.004%（质量分数）时，GO-HDSF的耐腐蚀电位增大到83mV，电流密度减小到6.5×10^-6A/cm²；GO-HDSF的最大无卡咬负荷PB值最大达到了481N。相比于未经氧化石墨烯改性的浓缩液，GO-HDSF的润滑性提高了11.9%，防腐蚀性提高了97.6%，同时耐高温、低温性能也显著提高。

关键词: 氧化石墨烯, 改性, 润滑性, 防腐性, 水性浓缩液

Abstract:

The carboxyl group in graphene oxide (GO) was activated by chemical method, and then GO graft modified triethanolamine oleate (MDLO-GO) was prepared through the reaction of GO and the hydroxyl group at the end of MDLO under certain conditions. Finally, after evenly mixing water, KOH and EDTA, potassium soap, MDLO-GO, emulsifier and defoamer were added in turn to obtain the graphene oxide modified water-based hydraulic support concentrated solution (GO-HDSF). The structure of MDLO-GO was confirmed by infrared spectroscopy and X-ray photoelectron spectroscopy, which proved that GO was successfully grafted to the MDLO molecular chain. The experimental results showed that the viscosity, corrosion resistance and lubricity of GO-HDSF were gradually improved with increasing GO addition. When the mass fraction of GO was 0.004%, the corrosion resistance potential of GO-HDSF increased to 83mV and the current density decreased to 6.5×10^-6A/cm². The maximum without bite load (PB) value of GO-HDSF reached to 481N. The lubricity of GO-HDSF was increased by 11.9% and the corrosion resistance was increased by 97.6% compared with the unmodified concentrated solution. At the same time, the high and low temperature resistance performance was also significantly improved respectively.

Key words: graphene oxide, modification, lubricity, corrosion resistance, concentrated solution

中图分类号:

TG147

顾丽敏, 薛伟. 氧化石墨烯改性水性半合成液压支架用浓缩液的制备与性能[J]. 化工进展, 2021, 40(3): 1611-1618.

GU Limin, XUE Wei. Preparation and properties of graphene oxide modified water-based semi-synthetic concentrated solution for hydraulic support[J]. Chemical Industry and Engineering Progress, 2021, 40(3): 1611-1618.

图/表 9

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样品	GO添加量（质量分数）/%	浓缩液		稀释液稳定性（168h）
样品	GO添加量（质量分数）/%	外观	耐冻融性（120h）	常温现象	高温现象
HDSF	0	微黄透明均一液体	大量析出物	无析出物	大量析出物
GO-HDSF-1	0.001	浅棕透明均一液体	微量析出物	无析出物	微量析出物
GO-HDSF-2	0.002	浅棕透明均一液体	微量析出物	无析出物	微量析出物
GO-HDSF-3	0.003	浅棕透明均一液体	微量析出物	无析出物	微量析出物
GO-HDSF-4	0.004	浅棕透明均一液体	微量析出物	无析出物	无析出物

样品	GO添加量（质量分数）/%	浓缩液		稀释液稳定性（168h）
样品	GO添加量（质量分数）/%	外观	耐冻融性（120h）	常温现象	高温现象
HDSF	0	微黄透明均一液体	大量析出物	无析出物	大量析出物
GO-HDSF-1	0.001	浅棕透明均一液体	微量析出物	无析出物	微量析出物
GO-HDSF-2	0.002	浅棕透明均一液体	微量析出物	无析出物	微量析出物
GO-HDSF-3	0.003	浅棕透明均一液体	微量析出物	无析出物	微量析出物
GO-HDSF-4	0.004	浅棕透明均一液体	微量析出物	无析出物	无析出物

样品	zeta电位/mV
样品	pH=7	pH=12
HDSF	-10.16	-14.1
GO-HDSF-1	-7.31	-10.8
GO-HDSF-2	-6.04	-8.06
GO-HDSF-3	-5.96	-7.33
GO-HDSF-4	-4.09	-5.77

样品	zeta电位/mV
样品	pH=7	pH=12
HDSF	-10.16	-14.1
GO-HDSF-1	-7.31	-10.8
GO-HDSF-2	-6.04	-8.06
GO-HDSF-3	-5.96	-7.33
GO-HDSF-4	-4.09	-5.77

名称	防锈性	润滑性PB/N
HDSF	有锈迹，有变色	430
GO-HDSF-1	无锈迹，有变色	437
GO-HDSF-2	无锈迹，有变色	441
GO-HDSF-3	无锈迹，无变色	470
GO-HDSF-4	无锈迹，无变色	481