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Attachment Mechanism and Control Efficacy of an Adhesive Nuisance Mussel, Limnoperna fortunei, for Coating and Materials

粘性贻贝（Limnoperna Fortunei）在涂料和材料中的附着机制和控制效果

基本信息

批准号：
12558070
负责人：
MATSUI Yoshihiko
金额：
$ 3.01万
依托单位：
Gifu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

项目摘要

The attachment strength of the freshwater mussel Limnoperna fortunei against water flow was studied. Newton's expression successfully described the hydrodynamic drag force acting on the mussel with a drag coefficient value of 1.03. The drag-resistant force (defined as hydrodynamic drag force at mussel detachment) was smaller than the detachment force measured using a tensile load test. A fairly good correlation was obtained between the drag-resistant force and the number of secreted threads. The drag-resistant force divided by the number of threads increased with shell size, suggesting that byssal thread strength increased with mussel growth. For the mussel specimens obtained from a water transmission pipe, thread width increased with shell size. However, thread width was not dependent on current velocity. There was no correlation between the number of secreted threads and shell length, which indicated that the number of secreted threads did not change with mussel size. Therefore, the … More water velocity needed to detach mussels increases with shell size of the mussel when the number of secreted threads is constant. The increases in the water velocity to detach mussels with larger shell suggested that the mussel becomes more resistant to water flow as it grows. It is estimated that a flow velocity around 1 m/s was critical for attachment/detachment of a juvenile mussel with a shell length of a few millimeters and one hundred byssal threads.Various anti-fouling substrates were tested for their effectiveness in inhibiting attachment of Limnoperna fortunei. Field experiments revealed that surface properties affected anti-fouling capabilities for nontoxic substrates. Anti-fouling capabilities were observed for 3 silicone-resin-based coatings with smooth surfaces of < 30 μm roughness and low surface free energy of the hydrogen-bonding force component. However, the remaining 3 silicone-resin-based coatings tested, as well as other types of nontoxic coatings, did not show any anti-fouling capabilities. The percentages of mussels that attached in laboratory experiments using juvenile mussels were correlated with the settling densities of mussels in the field experiments. This suggests that the laboratory experiments may be effective as short-term preliminary assays to select promising materials/coatings for longer-term field experiments. Mussel abundance surveys within a water transmission pipe and pipe current velocity simulation revealed that less mussel infestation was observed in the areas with wall-vicinity fluid velocity of > 1.3 m/s. Conversely, pipe surfaces with flows of < 1.2 m/s were heavily fouled by L. fortunei. Less

研究了淡水贻贝对水流的附着强度。牛顿的表达式成功地描述了流体动力学阻力作用在贻贝与阻力系数值为1.03。阻力（定义为贻贝分离时的流体动力学阻力）小于使用拉伸载荷试验测量的分离力。一个相当好的相关性之间的阻力和分泌丝的数量。阻力除以线程的数量与壳的大小增加，这表明深海线程的强度与贻贝的增长。从输水管道中采集的贻贝样品，螺纹宽度随贝壳尺寸的增大而增大。然而，线程宽度是不依赖于电流速度。分泌丝的数量与壳长之间没有相关性，表明分泌丝的数量不随贻贝的大小而变化。因此 ...更多信息当分泌丝的数量恒定时，分离贻贝所需的水流速度随着贻贝的壳尺寸而增加。在水流速度的增加，以分离具有较大的壳的贻贝，这表明贻贝变得更耐水流，因为它的增长。据估计，1米/秒左右的流速是关键的附着/脱离的稚贝与几毫米的壳长和100 bysyalthreads.Various防污基板的附着抑制Limnoperna fortunei的有效性进行了测试。现场实验表明，表面性质影响防污能力的无毒基板。3种有机硅树脂基涂层的表面粗糙度小于30 μm，氢键力分量的表面自由能较低，具有较好的防污性能。然而，测试的其余3种基于有机硅树脂的涂料以及其他类型的无毒涂料没有显示出任何防污能力。在实验室实验中，使用青少年贻贝附着的贻贝的百分比与贻贝在现场实验中的沉降密度相关。这表明，实验室实验可能是有效的短期初步分析，以选择有前途的材料/涂层进行长期的现场实验。在输水管道内的贻贝丰度调查和管道流速模拟显示，在壁附近流速> 1.3 m/s的区域观察到较少的贻贝侵扰。相反，流速< 1.2 m/s的管道表面被L严重污染。幸运。少