文章信息/Info

Title:

The effect of High voltage pulse electric field (HPEF) on inactivation of diatom on carbon black composite epoxy coating in marine environment

作者:

孫玉營; 吳進怡; 柴柯; 閆小宇

海南大學 熱帶島嶼資源先進材料教育部重點實驗室

Author(s):

SUN Yuying;  CHAI Ke;  YAN Xiaoyu;  WU Jinyi

Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources，Hainan University

關鍵詞:

炭黑; 高壓脈沖電場; 殺藻性能; 力學性能

Keywords:

carbon black;  high voltage pulse electric field;  diatom inactivation performance;  mechanical propertie

DOI:

10.7502/j.issn.1674-3962.2017.04.08

文獻標志碼:

A

摘要:

隨著環境管制條例的增多和對傳統有毒防污涂料的安全問題的關注，研究環保的海洋生物防污方法迫在眉睫。本研究采用TTC-脫氫酶活性測試來表征高壓脈沖電場（HPEF）結合炭黑環氧防腐復合涂層的防污性能。采用場發射掃描電子顯微鏡（FE-SEM）觀察分析炭黑復合涂層上的硅藻經脈沖電場處理前后的微觀結構和形貌特征。經HPEF處理后舟形藻和海鏈藻細胞出現凹陷，破裂及有機質溢出，說明HPEF殺藻可采用 “電穿孔”理論解釋。在通電時間十分鐘、頻率為23.15kHz、占空比為0.5、電壓為19kV條件下，硅藻的失活率達到最大。在炭黑復合涂層上的海鏈藻的最大失活率為89.2%，舟型藻的最大失活率為92.1%。適量的炭黑可以增強環氧樹脂的力學性能。炭黑復合涂層的力學性能取決于炭黑的添加量，當炭黑添加量為0.3%時可以得到綜合力學性能較好的復合涂層。

Abstract:

With increasing restrictions of environmental regulations and safety concerns on traditional poisonous coatings, it is highly desirable to develop a new green method for anti-biofouling in marine environment. In this paper, a green method that is high voltage pulse electric field (HPEF) combined with carbon black composite coating was found to inhibit the adhesion of diatom. Results are presented from diatom inactivation assays on the composite coating upon the application of HPEF. Diatom on the composite coating surfaces was visualized using scanning electron microscopy (SEM) for exploring the mechanism of that HPEF inhibit the adhesion of diatom. Using pulses of 10min in duration, 23.15 kHz in frequency, 0.5 in duty cycle and 19 kV in pulse amplitude, diatom inactivation rate reached the maximum. The largest inactivation rate of thalassiosira was 89.2%. The maximum inactivation rate of navicular was 92.1%. What’s more, we find that carbon black could increase the mechanical properties of epoxy resin, and the optimum content of carbon black was 0.3%.