Nano/Micro Particle Hybrid Composites for Scratch and Abrasion Resistant Polyacrylate Coatings
Nano/Micro Particle Hybrid Composites for Scratch and Abrasion Resistant Polyacrylate Coatings
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DOI：
10.1002/mame.200600034
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发表时间：
2006-05
影响因子：
3.9
通讯作者：
F. Bauer;R. Flyunt;K. Czihal;M. Buchmeiser;H. Langguth;R. Mehnert
中科院分区：
文献类型：
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作者：
F. Bauer;R. Flyunt;K. Czihal;M. Buchmeiser;H. Langguth;R. Mehnert
总结：制备了具有高含量的气相纳米尺寸二氧化硅的UV可固化丙烯酸酯制剂，以改善其用于耐磨和耐刮擦面漆的应用。将三烷氧基硅烷接枝到纳米颗粒的表面上促进了它们在制剂中的嵌入，并减轻了不期望的粘度和粘性增加的影响。改性的纳米粒子从几种有机硅烷，其特征在于通过多技术的方法。为了避免再分散过程中出现的问题，使用液体丙烯酸酯制剂作为稀释剂和解聚剂对纳米二氧化硅进行原位改性。与纯丙烯酸酯涂层相比，这些纳米复合材料表现出显著改善的性能，例如耐热性、耐刮擦性和耐磨性。然而，一个更好的耐磨性得到的涂层含有二氧化硅纳米粒子和纳米微粒。通过使用不同等级的滑石粉，纳米/微米杂化复合材料的协同效应已被研究用于镶木地板和地板应用。纯聚丙烯酸酯涂层（左侧）和纳米/微米杂化复合材料（18重量%）的图片二氧化硅+15重量%在泰伯磨损试验后，在镶木地板基材上的表面上的耐磨性。
Summary: UV curable acrylate formulations with a high content of fumed, nano-sized silica were prepared to improve their application for abrasion and scratch resistant top coats. Grafting of trialkoxysilanes onto the surface of nanoparticles facilitated their embedding in the formulation and alleviated the effect of undesired increase in viscosity and dilatancy. Modified nanoparticles were obtained from several organosilanes and characterized by a multitechnique approach. To avoid problems during redispersion, in situ modification of nano-sized silica was performed using the liquid acrylate formulation as a diluting and deagglomerating agent. These nanocomposite materials exhibit markedly improved properties as compared to neat acrylate coatings, e.g. heat, scratch, and abrasion resistance. However, a much better abrasion resistance was obtained for coatings containing both silica nanoparticles and corundum microparticles. By using various grades of corundum, a synergetic effect of nano/micro hybrid composite materials has been studied for parquet and flooring applications. Pictures of neat polyacrylate coating (on the left) and nano/micro hybrid composite material (18 wt.-% silica +15 wt.-% corundum) on parquet substrate after Taber Abraser Test.