石墨烯氧化物-氧化锌纳米棒基三元纳米复合超疏水防腐涂料的简便设计

ty10086 提交于 周三, 08/25/2021 - 16:44
文章英文标题
Facile design of graphene oxide-ZnO nanorod-based ternary nanocomposite as a superhydrophobic and corrosion-barrier coating
正文
我们报道了一种简单设计的ZnO纳米棒修饰的聚二甲基硅氧烷( PDMS ) /氧化石墨烯纳米片三元纳米复合材料( GO-ZnO NRs ),作为一种优异的超疏水防腐涂料应用于钢铁基体。采用一步化学浴沉积法制备了GO-ZnO杂化纳米填料,并通过溶液浇铸法制备了三元纳米复合材料。分级ZnO NRs为平均宽度40 ~ 50   nm的单晶,
文章内容(英文)
We reported a facile design of ternary nanocomposites of polydimethylsiloxane (PDMS)/graphene oxide nanosheets decorated with ZnO nanorods (GO-ZnO NRs) as an outstanding superhydrophobic and anticorrosion coating material for steel substrates. GO-ZnO hybrid nanofiller was synthesized using a one-step chemical bath deposition, and the ternary nanocomposite was fabricated by solution casting. Hierarchical ZnO NRs were single crystals with 40–50 nm average width, \u0026lt; 1 µm average length, wurtzite structure, and exposed site in the [0001] crystal orientation. These NRs were decorated on \u0026lt; 2 nm-thick sheets of GO with nanoscale sizes, morphologies, and geometries. The PDMS/GO-ZnO ternary nanocomposite was dried through hydrosilation curing. The effects of different concentrations of GO-ZnO hybrid nanofiller dispersed in the PDMS resin on the barrier and anticorrosion properties were investigated. Surface features, including free energy, superhydrophobicity, chemical heterogeneity, and micro-nano roughness of the nanocomposite coatings were also studied. Electrochemical experiments including determination of Tafel polarization, electrochemical impedance spectra, and open circuit potential were conducted over carbon steel as the relatively immersed surface in a solution of 3.5% NaCl. Salt spray test was performed on the coated specimens for 500 h to study their corrosion protection. Results indicated that the silicone composite with 1 wt.% of GO-ZnO hybrid nanofillers exhibited excellent coating performance. This composite showed enhanced superhydrophobicity and roughness with water contact angle of 151° and corrosion protection. Hence, the designed PDMS/GO-ZnO ternary nanocomposite possesses outstanding superhydrophobic and anticorrosion features and could be used to design next-generation anticorrosive coatings.
来源出处
Journal|[J]Colloids and Surfaces A: Physicochemical and Engineering Aspects2020. PP 125793-
DOI
https://doi.org/10.1016/j.colsurfa.2020.125793

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此链接为PDMS-微流控芯片/PDMS/道康宁SYLGARD184/小桶0.5KG装的链接。

一般性的产品性能参数表参考以下小桶装的参数:

微流控芯片/PDMS/道康宁SYLGARD184;微流控芯片/PDMS/道康宁SYLGARD184;微流控芯片/PDMS/道康宁SYLGARD184;

品牌型号:道康宁SYLGARD184

包装规格:0.5KG/罐[含有45.4g固化剂,总重量为0.5KG]

产品颜色:保质期限:36个月

存放环境说明:室温,阴凉处保存

备注说明:

美国道康宁道康宁SYLGARD 184硅橡胶是由液体组分组成的双组分套件产品,包括基本组分与固化剂。基本组分与固化剂按10:1重量比完全混合,中等粘度混合液的稠度与SAE 40机油相似。无论厚薄,混合液将固化成为具有韧性的透明弹性体,最适用于电子/电气方面的封装与灌封应用。 道康宁SYLGARD 184硅橡胶在25~150℃的温度范围内固化,无放热现象,无需二次固化。固化过程完成后,可立即在-55~200℃的温度范围内使用。 产品特性:低毒性,在常规的工业操作中,无特别的注意事项; 无溶剂或固化副产物, 固化时不放热;无需特殊的通风条件,不会产生腐蚀;固化时,收缩量小; 固化后, 透明具有弹性;抗震与减缓机械震动;振动的传递性能小;元件可裸视检查与易修补性; 环保性能;低吸水性,良好的耐辐射性能;高真空状态下的低漏气性; 优异的电性能;较大温度范围内的稳定性, 抗解聚;在-55~200℃范围内,甚至在密闭状态下保持弹性与柔韧性,性能稳定; 阻燃性,UL可燃性分级为94 V-1,温度等级:130℃ 产品用途: 道康宁SYLGARD 184硅橡胶在电气/电子的封装与灌封方面有广泛的应用。