Watson Hazel, Norström Anne, Torrkulla Å Åsa, Rosenholm Jarl
Department of Physical Chemistry, Åbo Akademi University, Porthansgatan 3-5, Åbo, 20500, Finland
J Colloid Interface Sci. 2001 Jun 1;238(1):136-146. doi: 10.1006/jcis.2001.7506.
The majority of work available in the literature examines the effect of epoxy silane, gamma-aminopropyltrimethoxy silane, and methacrylate silane on E-glass surfaces. As alternatives to the most commonly used silanes, we investigated two novel silanes: gamma-ureidopropyltriethoxy silane and Nbeta(aminoethyl) gamma-aminotrimethoxy silane and additionally an amino-functional polysiloxane. The ureido silane-treated E-glass fibers demonstrated a zeta potential similar to that of the untreated E-glass fibers, which was independent of deposition solution pH over the pH range investigated. A moderately hydrophobic E-glass surface, which was silane concentration dependent, was noted as being due to condensed Si-O-Si bonds at the surface. The diamino silane demonstrated an extremely basic surface at the higher silane concentrations investigated. These outer surface layers were modified by changing the pH and the concentration of the deposition solution. The polysiloxane produced an increase in the hydrophobicity of the E-glass fiber, especially when deposited from extremely basic solutions. At the higher solution concentrations investigated, the silanes and the siloxane was initially deposited in patches and an outer surface or "skin" was formed over these patches, giving the appearance of fully coated fibers. Copyright 2001 Academic Press.
文献中现有的大部分研究探讨了环氧硅烷、γ-氨丙基三甲氧基硅烷和甲基丙烯酸酯硅烷对E玻璃表面的影响。作为最常用硅烷的替代品，我们研究了两种新型硅烷：γ-脲基丙基三乙氧基硅烷和Nβ（氨乙基）γ-氨基三甲氧基硅烷，此外还研究了一种氨基官能化聚硅氧烷。经脲基硅烷处理的E玻璃纤维表现出与未处理的E玻璃纤维相似的ζ电位，在所研究的pH范围内，该电位与沉积溶液的pH无关。观察到E玻璃表面具有适度的疏水性，且这种疏水性取决于硅烷浓度，这是由于表面的Si-O-Si键缩合所致。在所研究的较高硅烷浓度下，二氨基硅烷表现出极强的碱性表面。通过改变沉积溶液的pH和浓度来改性这些外层表面。聚硅氧烷使E玻璃纤维的疏水性增加，尤其是从极强碱性溶液中沉积时。在所研究的较高溶液浓度下，硅烷和硅氧烷最初以斑块形式沉积，并在这些斑块上形成外层表面或“表皮”，使纤维呈现出完全包覆的外观。版权所有2001年学术出版社。
