高填量疏水型Al_2O_3/TPU防腐蚀可剥离膜的制备及耐腐蚀性能
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摘要
以聚氨酯弹性体(TPU)材料为基体,硬脂酸(SA)改性的氧化铝(Al_2O_3)为填料,采用平板流延法制备了SA-Al_2O_3/TPU复合材料。通过红外光谱表征SA-Al_2O_3的化学结构,X射线衍射分析SA-Al_2O_3和复合材料的结晶性能;利用扫描电镜观察SA-Al_2O_3/TPU复合材料的形貌;采用拉伸试验测试复合材料的力学性能;热重分析研究了复合材料的热稳定性能;利用盐水浸泡实验研究了复合材料的防腐性能。研究结果表明,Al_2O_3经硬脂酸改性后,化学结构和晶型均未发生变化,接触角提高到160.8°;在满足一定的使用范围内,复合材料中SA-Al_2O_3添加量最高可达40%(质量分数),拉伸强度和断裂伸长率分别为20.74 MPa、446.55%,热稳定性能良好,且防腐性能较好。
The SA-Al_2O_3/TPU composites were prepared by the slab casting method using polyurethane elastomer(TPU) as matrix and stearic acid(SA) modified alumina as filler. The chemical structure of SA-Al_2O_3 was characterized by FT-IR, the crystallinity of the SA-Al_2O_3 and composites was analyzed by XRD. Meanwhile, the morphology, mechanical properties, thermal stability and corrosion resistance of SA-Al_2O_3/TPU composites were observed by SEM, tensile test, TG and brine immersion experiment, respectively. The results show that the chemical structure and the crystal form of Al_2O_3 modified with stearic acid do not change, the contact angle increases to 160.8°. Satisfying a certain range of usage, the content of added SA-Al_2O_3 in the composite materials reaches 40%, the tensile strength and the elongation at break are 20.74 MPa, 446.55% respectively, the thermal stability and the corrosion resistance are better.
The SA-Al_2O_3/TPU composites were prepared by the slab casting method using polyurethane elastomer(TPU) as matrix and stearic acid(SA) modified alumina as filler. The chemical structure of SA-Al_2O_3 was characterized by FT-IR, the crystallinity of the SA-Al_2O_3 and composites was analyzed by XRD. Meanwhile, the morphology, mechanical properties, thermal stability and corrosion resistance of SA-Al_2O_3/TPU composites were observed by SEM, tensile test, TG and brine immersion experiment, respectively. The results show that the chemical structure and the crystal form of Al_2O_3 modified with stearic acid do not change, the contact angle increases to 160.8°. Satisfying a certain range of usage, the content of added SA-Al_2O_3 in the composite materials reaches 40%, the tensile strength and the elongation at break are 20.74 MPa, 446.55% respectively, the thermal stability and the corrosion resistance are better.
引文
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[15] Mo M T,Zhao W J,Chen Z F,et al.Corrosion inhibition of functional graphene reinforced polyurethane nanocomposite coatings with regular textures[J].RSC Adv.,2016,6:7780-7790.