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制备具有抗蓝紫光/红光和水性能的蓝藻增强型聚乙烯醇基薄膜。

Preparation of cyanobacteria-enhanced poly(vinyl)alcohol-based films with resistance to blue-violet light / red light and water.

机构信息

Jiangsu Provincial Key Laboratory of Environmental Engineering, Jiangsu Academy of Environmental Science, Nanjing, Jiangsu Province, China.

College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu Province, China.

出版信息

PLoS One. 2020 Feb 13;15(2):e0228814. doi: 10.1371/journal.pone.0228814. eCollection 2020.

DOI:10.1371/journal.pone.0228814
PMID:32053641
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7018049/
Abstract

The harmful cyanobacteria blooms which usually form in spring and summer, cause global eutrophication of freshwater and coastal marine ecosystems. This study tried to utilize cyanobacteria as a raw material to produce biological poly(vinyl)alcohol-based films. Cyanobacteria was firstly modified with poly(ethylene glycol), guanidine hydrochloride, carboxymethyl cellulose and 3-glycidoxypropyltrimethoxysilane as plasticizer, modifier, toughening agent and coupling agent, respectively. And then the modified cyanobacteria was introduced to poly(vinyl)alcohol and cellulose nanofibers/poly(vinyl)alcohol matrix to improve the barrier properties of poly(vinyl)alcohol to light and water. Compared with poly(vinyl)alcohol and cellulose nanofibers/poly(vinyl)alcohol films, the obtained cyanobacteria/poly(vinyl)alcohol and the cyanobacteria/cellulose nanofibers/poly(vinyl)alcohol composites exhibit better resistance to light and water. More interestingly, we found that after adding cyanobacteria, the poly(vinyl)alcohol-based films present better barrier properties to blue-violet light and red light. In adddition, introducing cyanobacteria into poly(vinyl)alcohol or cellulose nanofibers/poly(vinyl)alcohol matrix increases the surface roughness and contact angle to water of the composites.

摘要

通常在春季和夏季形成的有害蓝藻水华导致了全球淡水和沿海海洋生态系统的富营养化。本研究试图利用蓝藻作为原料来生产生物聚（乙烯醇）基薄膜。首先用聚乙二醇、盐酸胍、羧甲基纤维素和 3-缩水甘油丙基三甲氧基硅烷分别作为增塑剂、改性剂、增韧剂和偶联剂对蓝藻进行改性。然后将改性蓝藻引入聚（乙烯醇）和纤维素纳米纤维/聚（乙烯醇）基质中，以提高聚（乙烯醇）对光和水的阻隔性能。与聚（乙烯醇）和纤维素纳米纤维/聚（乙烯醇）薄膜相比，所得蓝藻/聚（乙烯醇）和蓝藻/纤维素纳米纤维/聚（乙烯醇）复合材料具有更好的抗光和抗水性能。更有趣的是，我们发现，加入蓝藻后，基于聚（乙烯醇）的薄膜对蓝紫光和红光具有更好的阻隔性能。此外，将蓝藻引入聚（乙烯醇）或纤维素纳米纤维/聚（乙烯醇）基质中会增加复合材料的表面粗糙度和水接触角。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c68/7018049/b51874ab439c/pone.0228814.g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c68/7018049/aaa8724d39bd/pone.0228814.g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c68/7018049/9c21e79b2997/pone.0228814.g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c68/7018049/832999d682a2/pone.0228814.g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c68/7018049/c3a50866e6c0/pone.0228814.g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c68/7018049/bec87cf1eda0/pone.0228814.g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c68/7018049/b51874ab439c/pone.0228814.g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c68/7018049/aaa8724d39bd/pone.0228814.g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c68/7018049/9c21e79b2997/pone.0228814.g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c68/7018049/832999d682a2/pone.0228814.g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c68/7018049/c3a50866e6c0/pone.0228814.g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c68/7018049/bec87cf1eda0/pone.0228814.g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c68/7018049/b51874ab439c/pone.0228814.g006.jpg

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