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

Author

Sainan Chen, Di Liu, Min Qian, Li Xu, Ying Li, Haozhong Sun, Xi Wang, Haiyun Zhou, Jian Bao, and Changyan Xu

Subjects
Medicine, Science
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.

Published
2020
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2. Preparation of cyanobacteria-enhanced poly(vinyl)alcohol-based films with resistance to blue-violet light / red light and water

Author

Haiyun Zhou, Chen Sainan, Bao Jian, Haozhong Sun, Changyan Xu, Qian Min, Di Liu, Ying Li, Xu Li, and Wang Xi

Subjects
Cyanobacteria, Light, Nanofibers, Alcohol, 02 engineering and technology, 01 natural sciences, Guanidines, Physical Chemistry, chemistry.chemical_compound, Biomimetic Materials, Plasticizers, Materials Testing, Nanotechnology, Materials, Multidisciplinary, biology, Organic Compounds, Physics, Electromagnetic Radiation, 021001 nanoscience & nanotechnology, Chemistry, Physical Sciences, Engineering and Technology, Medicine, 0210 nano-technology, medicine.drug, Research Article, Chemical Elements, Vinyl alcohol, Visible Light, Surface Properties, Ultraviolet Rays, Science, Materials Science, Vibration Engineering, macromolecular substances, 010402 general chemistry, medicine, Cellulose, Guanidine, Nanomaterials, Bacteria, Chemical Bonding, Mechanical Engineering, organic chemicals, Organic Chemistry, Plasticizer, Organisms, Chemical Compounds, technology, industry, and agriculture, Water, Biology and Life Sciences, Hydrogen Bonding, biology.organism_classification, 0104 chemical sciences, Carboxymethyl cellulose, Oxygen, chemistry, Chemical engineering, Nanofiber, Polyvinyl Alcohol, bacteria, Ethylene glycol
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.

Published
2020

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