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Inorganic nanoparticle embedded Polydimethyl siloxane nanocomposites for biofouling mitigation
Surfaces and Interfaces ( IF 6.2 ) Pub Date : 2021-05-07 , DOI: 10.1016/j.surfin.2021.101171
Alwar Ramanujam Padmavathi , P. Sriyutha Murthy , Arindam Das , Panchapakesan Veeramani , Toleti Subba Rao

Polydimethyl siloxane (PDMS) CuO nanocomposites (NCs) were prepared using plain CuO and cetyltrimethyl ammonium bromide (CTAB) capped (0.05 & 1.0M) CuO nanoparticles as nanofillers. Incorporation of plain CuO and CuO-1M capped NP as nanofillers into PDMS altered their surface roughness and imparted biocidal activity by release of metal ions. CTAB capping increased the zeta potential of synthesized nanoparticles with 0.05M CTAB yielding monodispersed CuO-NP with enhanced broad spectrum antifouling activity in PDMS matrix. Nanocomposites were tested for their efficacy against inhibition of bacterial (in vitro) and diatom adhesion (in situ) in laboratory and coastal waters respectively. PDMS-CuO-CTAB (0.05M) capped nanoparticles showed significant (p<0.05) antibiofilm property against Staphylococcus lentus and Vibrio natriegens. Diatoms extensively colonized plain PDMS surfaces (1.2 × 103 cm−2), whereas PDMS-CuO, PDMS-CuO-0.05M CTAB, PDMS-CuO-1M CTAB NCs showed 1.20 × 103, 4.86 × 102 and 5.82 × 102 cells cm−2 respectively. Field exposure trials showed reduction in fouling biomass from 9 Kg m−2 (on plain PDMS) to 0.6 Kg m-2 on PDMS-CuO (0.05M CTAB) NC after 90 days of exposure in coastal waters. Percentage surface area coverage of fouling organisms also reduced significantly (p<0.05) from 98.3 ± 0.6% on plain PDMS to 36.8 ± 2.34% on PDMS-CuO-(0.05M CTAB) nanocomposite. Overall, PDMS-CuO-(0.05M CTAB) nanocomposite exhibited broad spectrum antifouling activity against different levels of fouling organisms and offers a potential antifouling surface.



中文翻译:

无机纳米粒子包埋的聚二甲基硅氧烷纳米复合材料,可减轻生物污损

聚二甲基硅氧烷(PDMS)CuO纳米复合材料(NCs)是使用普通CuO和十六烷基三甲基溴化铵(CTAB)封端的(0.05&1.0M)CuO纳米颗粒作为纳米填料制备的。将纯CuO和CuO-1M封端的NP作为纳米填料并入PDMS,可改变其表面粗糙度,并通过释放金属离子赋予杀菌活性。CTAB封盖增加了0.05M CTAB合成纳米颗粒的Zeta电位,从而在PDMS基质中产生了具有增强的广谱防污活性的单分散CuO-NP。分别测试了纳米复合材料在实验室和沿海水域对细菌(体外)和硅藻粘附(原位)的抑制作用。PDMS-CuO-CTAB(0.05M)封端的纳米颗粒显示显着(p <0.05)对葡萄球菌纳氏弧菌的抗生物膜性能。硅藻广泛定植平原PDMS表面(1.2×10 3厘米-2),而PDMS-的CuO,PDMS-CuO系0.05M CTAB,PDMS-CuO系1M CTAB的NC显示出1.20×10 3,4.86×10 2和5.82×10 2个单元cm -2。现场暴露试验表明,在沿海水域暴露90天后,PDMS-CuO(0.05M CTAB)NC上的污垢生物量从9 Kg m -2(在普通PDMS上)降低到0.6 Kg m -2。污垢生物的表面积覆盖率百分比也显着降低(p <0.05),从普通PDMS的98.3±0.6%到PDMS-CuO-(0.05M CTAB)纳米复合材料的36.8±2.34%。总体而言,PDMS-CuO-(0.05M CTAB)纳米复合材料对不同水平的污垢生物表现出广谱的防污活性,并提供了潜在的防污表面。

更新日期:2021-05-13
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