Iguerb O, Poleunis C, Mazéas F, Compère C, Bertrand P
Unité de Physico-Chimie et de Physique des Matériaux, Université Catholique de Louvain, Louvain-la-Neuve, Belgium.
Langmuir. 2008 Nov 4;24(21):12272-81. doi: 10.1021/la801814u. Epub 2008 Oct 8.
Biofouling of all structures immersed in seawater constitutes an important problem, and many strategies are currently being developed to tackle it. In this context, our previous work shows that poly(ethylene glycol) monoacrylate (PEGA) macromonomer grafted on preoxidized poly(methyl methacrylate) (PMMAox) films exhibits an excellent repellency against the bovine serum albumin used as a model protein. This study aims to evaluate the following: (1) the prevention of a marine extract material adsorption by the modified surfaces and (2) the antifouling property of the PEGA-g-PMMAox substrates when immersed in natural seawater during two seasons (season 1: end of April-beginning of May 2007, and season 2: end of October-beginning of November 2007). The antifouling performances of the PEGA-g-PMMAox films are investigated for different PEG chain lengths and macromonomer concentrations into the PEGA-based coatings. These two parameters are followed as a function of the immersion time, which evolves up to 14 days. The influence of the PEGA layer on marine compounds (proteins and phospholipids) adsorption is evidenced by time-of-flight secondary ion mass spectrometry (ToF-SIMS) and X-ray photoelectron spectroscopy (XPS). It was found that the antifouling efficiency of the PEGA-grafted surfaces increases with both PEGA concentration and PEG chain length.
所有浸没在海水中的结构的生物污损都是一个重要问题，目前正在开发许多策略来解决这一问题。在此背景下，我们之前的工作表明，接枝在预氧化聚甲基丙烯酸甲酯（PMMAox）薄膜上的聚乙二醇单丙烯酸酯（PEGA）大分子单体对用作模型蛋白的牛血清白蛋白表现出优异的排斥性。本研究旨在评估以下内容：（1）改性表面对海洋提取物材料吸附的预防作用，以及（2）PEGA接枝的PMMAox基材在两个季节（季节1：2007年4月底至5月初，季节2：2007年10月底至11月初）浸入天然海水中时的防污性能。针对基于PEGA的涂层中不同的PEG链长和大分子单体浓度，研究了PEGA接枝的PMMAox薄膜的防污性能。这两个参数随浸泡时间的变化而变化，浸泡时间最长可达14天。通过飞行时间二次离子质谱（ToF-SIMS）和X射线光电子能谱（XPS）证明了PEGA层对海洋化合物（蛋白质和磷脂）吸附的影响。发现PEGA接枝表面的防污效率随PEGA浓度和PEG链长的增加而提高。
