Protein valves formed through click-reaction grafting of poly(N-isopropylacrylamide) onto electrospun poly(2,6-dimethyl-1,4-phenylene oxide) fibrous membranes

Guo, Juan; Wu, Yihui; Chen, Shih-Hsun; Fang, Alexander W.; Lee, Sheng-Chi; Chen, Jem-Kun

doi:10.1016/j.memsci.2018.01.024

Cited by 12 publications

(7 citation statements)

References 48 publications

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“…In the past several years, nanofabrics made via electrospinning have been employed to further improve the PM removal efficiency because of their high specific surface area and energy. Tremendous efforts have been made to prepare nanofibers via electrospinning polymers and natural protein, such as polypropylene, polyacrylonitrile, , soy protein, , whey protein, silk, , and zein . Importantly, the protein-based nanofibers fabricated by electrospinning presented the combination of the advantages of the nanofibers with high surface area and proteins that have a huge amount of active functional groups enabling efficient capability of capturing gaseous pollutants and small particles from the air. ,,− Although the filtration efficiency of the nanofabrics by electrospinning is significantly improved, deterioration of the airflow performance is almost inevitable because of the compact nanofabrics.…”

Section: Introductionmentioning

confidence: 99%

Hierarchically Structured All-biomass Air Filters with High Filtration Efficiency and Low Air Pressure Drop Based on Pickering Emulsion

Fan

Wang

Zhong

et al. 2019

ACS Appl. Mater. Interfaces

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Although a high-efficiency air filter can be achieved from electrospun nanofabrics, it has been challenging to reduce the pressure drop, increase the filtration capacity, and improve the production rate of the electrospinning process. Here, we report a hierarchically structured all-biomass air filter with high filtration efficiency and low air pressure drop based on applying Pickering emulsions to generate proteinfunctionalized nanostructures. Specifically, the air filter consists of cellulose nanofibers (CNF)/zein nanoparticles as active fillers prepared from Pickering emulsions and porous structures of microfibers as the frame from wood pulp (WP). The zein-protein-coated nanoparticles, CNF/zein, contribute in multiple ways to improve removal efficiency of the filters. First, the exposed functional groups of zein-protein help to trap air pollutants including toxic gaseous molecules via interaction mechanisms. Second, the nanoparticles with a high surface area promote the capture capability for small particulate pollutants. Meanwhile, the long-micron WP fibers forming a frame with large pores significantly reduce the pressure drop. Via adjusting the component ratios of in the Pickering emulsion, we report an optimized air filter with the high efficiency for capturing both types of pollutants: particulate matter (PM) and chemical gasses such as HCHO and CO, and the extremely low normalized pressure drop, that is, approximately 1/170 of the zein-based nano air filter by electrospinning. This study initiates a cost-effective strategy for forming a hierarchical nano-and microstructure, enabling high efficiency of capturing particulate pollutants of a wide size range and more species. More significantly, this is the first study in which Pickering emulsion is applied as a critical approach with integration of bio-and nano-technology to make high-performance, green air filters.

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Section: Introductionmentioning

confidence: 99%

Hierarchically Structured All-biomass Air Filters with High Filtration Efficiency and Low Air Pressure Drop Based on Pickering Emulsion

Fan

Wang

Zhong

et al. 2019

ACS Appl. Mater. Interfaces

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“…Recently, some researchers applied protein-based nanofibers constructed by electrospinning in preparing air filters, such as silk protein, silk fibroin, soy protein, , and whey protein . These protein-based nanofilters can capture various types of pollutants via the large surface area and abundant functional groups on the nanofiber surface, which can deliver strong interactions with different pollutants. , These natural protein nanofabrics showed very high removal efficiency for both particulate matter and toxic chemicals.…”

Section: Introductionmentioning

confidence: 99%

A Nanoprotein-Functionalized Hierarchical Composite Air Filter

Fan

Wang

Kong

et al. 2018

ACS Sustainable Chem. Eng.

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Building nanostructured active materials and rational porous structures in air filters will be significant in realizing high filtration efficiency and low normalized pressure drop. The construction of nanofabrics by electrospinning can lead to large active surface areas, but it has been challenging to control the porous structures to reduce the normalized pressure drop, in particular for thick fabrics. To address this issue, here, we report a protein-functionalized composite air filter with hierarchical structures. This composite is made of bacterial nanocellulose coated by protein nanoparticles and microcellulose fibers from wood pulp. The protein-functionalized nanocellulose can not only help expose the functional groups of protein for trapping pollutants but also act as a binder to reinforce the composite fabrics. At the same time, the long microcellulose fibers form large pores, reducing normalized pressure drop and improving mechanical properties. By adjusting the component ratios, we demonstrate a high-performance protein/nanocellulose/microcellulose composite air filter with high filtration efficiency of above 99.5% for PM 1−2.5 but extremely low normalized pressure drop of 0.194 kPa/g, which is only about 1% of that for protein nanofabrics constructed by electrospinning. This study brings about a cost-effective strategy based on protein-functionalized hierarchical composite fabrics for fabrication of an advanced, green, sustainable air filter.

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“…The results suggest that protein coatings sheltered these XRD signals. A broad peak ranged from 16.50° to 28.3° was attributed to the amorphous silica of shell [41].…”

Section: Characterization Of the Immunosensorsmentioning

confidence: 99%

“…However, the characteristic peaks of CdTe were still unobvious. Chemical compositions of the WE surface with and without the immunosensor 3NLG modi cation were determined using XPS [41]. Figure 2a displays the high-resolution C 1s core-level XPS spectra of the IP@S@GY1-HSA-Cd@GY2-modi ed surface with and without the 3NLG.…”

Section: Characterization Of the Immunosensorsmentioning

confidence: 99%

Gradients of a Sandwich-structured Immunosensor Controlled Using Magnetized Masks for Determination of Human Serum Albumin Using Electrochemiluminescence

Huang

Chang

Huang

et al. 2021

Preprint

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Background: Separation of macromolecules or particles from a colloid system to from gradient structure on the surface has been employed for biosensing systems, suggesting an enhancement of the chemical and physical features of particles. Performance of an electrochemiluminescence (ECL) immunosensor was employed to improve with a particle gradient.Results: Magnetic beads with silicon dioxide coating were adopted as nanocarriers for gradient manipulation and immobilized with the primary antibody. Cadmium telluride quantum dots (CdTe QDs) were coated with a layer of protein G for conjugation and orientation of secondary antibody as signal labels. ECL immunosensor gradients upon the electrode were formed by magnetolithography with magnetized nickel masks of column and stripe arrays at various scales. The immunosensor generally aggregated as island on the substrate through a dry process of water evaporation leading to a decrease of efficiency in the characteristic signals. Stripe arrays of magnetized nickel were designed to generate cylindrical magnetic flux on the substrate to improve the particle manipulation with the gradient. Various gradients of the sandwich-structured immunosensor substantially affected the electrochemical performance. Compared to the gradient-free immunosensor, the gradient of the immunosensor generated using the 3-μm-stripe array mask of magnetolithography enhanced the ECL intensity ~2.2 times. Conclusions: The results of quantification of human serum albumin (HSA) with the gradient immunosensor showed a broad linear range (15–420 ng mL−1), a low limit of detection (8 ng mL−1) and high reliability for HSA-spiked serum samples, indicating that the immunosensor gradient substantially enhances the performance of the ECL assay.

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Protein valves formed through click-reaction grafting of poly(N-isopropylacrylamide) onto electrospun poly(2,6-dimethyl-1,4-phenylene oxide) fibrous membranes

Cited by 12 publications

References 48 publications

Hierarchically Structured All-biomass Air Filters with High Filtration Efficiency and Low Air Pressure Drop Based on Pickering Emulsion

Hierarchically Structured All-biomass Air Filters with High Filtration Efficiency and Low Air Pressure Drop Based on Pickering Emulsion

A Nanoprotein-Functionalized Hierarchical Composite Air Filter

Gradients of a Sandwich-structured Immunosensor Controlled Using Magnetized Masks for Determination of Human Serum Albumin Using Electrochemiluminescence

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