Wang Dongwei, Wu Xia, Long Lixia, Yuan Xubo, Zhang Qinghua, Xue Shengzhang, Wen Shumei, Yan Chenghu, Wang Jianming, Cong Wei
a School of Food Engineering and Biological Technology , Tianjin University of Science & Technology , Tianjin , P.R. China.
b State Key Laboratory of Biochemical Engineering, Institute of Process Engineering , Chinese Academy of Sciences , Beijing , P.R. China.
Biofouling. 2017 Nov;33(10):970-979. doi: 10.1080/08927014.2017.1394457. Epub 2017 Nov 28.
To improve the antifouling (AF) properties of photobioreactors (PBR) for microalgal cultivation, using trihydroxymethyl aminomethane (tris) as the linking agent, a series of polyethylene (PE) films grafted with sulfobetaine (PE-SBMA) with grafting density ranging from 23.11 to 112 μg cm were prepared through surface-initiated atom transfer radical polymerization (SI-ATRP). It was found that the contact angle of PE-SBMA films decreased with the increase in the grafting density. When the grafting density was 101.33 μg cm, it reached 67.27°. Compared with the PE film, the adsorption of protein on the PE-SBMA film decreased by 79.84% and the total weight of solid and absorbed microalgae decreased by 54.58 and 81.69%, respectively. Moreover, the transmittance of PE-SBMA film recovered to 86.03% of the initial value after cleaning, while that of the PE film recovered to only 47.27%. The results demonstrate that the AF properties of PE films were greatly improved on polySBMA-grafted surfaces.
为提高用于微藻培养的光生物反应器（PBR）的防污（AF）性能，以三羟甲基氨基甲烷（Tris）为连接剂，通过表面引发原子转移自由基聚合（SI-ATRP）制备了一系列接枝密度范围为23.11至112 μg/cm²的磺基甜菜碱接枝聚乙烯（PE）膜（PE-SBMA）。发现PE-SBMA膜的接触角随接枝密度的增加而降低。当接枝密度为101.33 μg/cm²时，接触角达到67.27°。与PE膜相比，PE-SBMA膜上蛋白质的吸附量减少了79.84%，固体和吸附微藻的总重量分别减少了54.58%和81.69%。此外，清洗后PE-SBMA膜的透光率恢复到初始值的86.03%，而PE膜仅恢复到47.27%。结果表明，在聚SBMA接枝表面上PE膜的AF性能得到了极大改善。
