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新型纳米纤维素/醋酸纤维素基膜从稻草中提取，提高抗生物污染性能，用于海水淡化。

Improved anti-biofouling resistances using novel nanocelluloses/cellulose acetate extracted from rice straw based membranes for water desalination.

机构信息

Department of Materials Science, Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt.

Petrochemicals Department, Faculty of Engineering, Pharos University, Alexandria, Egypt.

出版信息

Sci Rep. 2022 Mar 14;12(1):4386. doi: 10.1038/s41598-022-08324-8.

DOI:10.1038/s41598-022-08324-8
PMID:35288623
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8921283/
Abstract

Cellulose and Nanocellulose acetate (NCA) have attractive novel properties like excellent mechanical properties, rich hydroxyl groups for modification, and natural properties with environmental friendliness. Cellulose was extracted from rice straw wastes as an extra value, then it had been further transformed into NCA using the acidic hydrolysis technique. The structural, crystalline, morphological, were characterized by Fourier transform infrared spectroscopy (FTIR), Proton nuclear magnetic resonance (HNMR), X-ray diffraction (XRD), Scanning microscopy, respectively. The particle size of the Nanocellulose extracted from rice straw was about 22 nm with a spherical shape. Development membranes were prepared with different concentrations of NCA to improve the performance and the anti-biofouling properties of cellulose acetate reverse osmosis (RO) membranes using a phase inversion technique. The structural of membranes were characterized by FTIR, water contact angle measurements, while the anti-biofouling properties were studied by static protein adsorption. The results indicated the development membrane features a lower contact angle accomplished with exhibits pore-forming ability and enhanced hydrophilicity of prepared membrane, furthermore the development cellulose acetate reverse osmosis (CA-RO) membranes with 40:60% RNCA:CA produced a salt rejection of 97.4% and a water flux of 2.2 L/m h. the development membrane have resists effectively protein adsorption and microbial growth showed from the results of Static protein adsorption.

摘要

纤维素和纳米醋酸纤维素（NCA）具有吸引人的新颖特性，如优异的机械性能、丰富的羟基可用于修饰以及天然的环保特性。纤维素是从稻草废弃物中提取的，具有额外的附加值，然后使用酸性水解技术进一步转化为 NCA。通过傅里叶变换红外光谱（FTIR）、质子核磁共振（HNMR）、X 射线衍射（XRD）、扫描显微镜分别对其结构、结晶、形态进行了表征。从稻草中提取的纳米纤维素的粒径约为 22nm，呈球形。使用相转化技术，通过不同浓度的 NCA 制备开发膜，以提高纤维素醋酸酯反渗透（RO）膜的性能和抗生物污染性能。通过 FTIR、水接触角测量对膜的结构进行了表征，通过静态蛋白质吸附研究了抗生物污染性能。结果表明，开发膜的特征是具有较低的接触角，表现出成孔能力和增强了所制备膜的亲水性，此外，40:60% RNCA:CA 的开发纤维素醋酸酯反渗透（CA-RO）膜的盐截留率为 97.4%，水通量为 2.2L/mh。从静态蛋白质吸附的结果可以看出，开发膜有效地抵抗了蛋白质吸附和微生物生长。

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