Robust and water-selective natural-cellulose-nanofiber-reinforced polyvinyl alcohol composite membranes for pervaporation of isopropanol/water mixtures

Yeo, Sang Jun; Chaudhari, Shivshankar; Kim, UiSeo; Shin, HyeonTae; Cho, Kie Yong; Kwon, Hyuk Taek; Shon, MinYoung; Nam, Soohyun; Park, YouIn

doi:10.1016/j.cep.2022.109046

Cited by 7 publications

(3 citation statements)

References 37 publications

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“…The wide absorption band of CNF/PVA composite films at 3000−3600 cm −1 is caused by the tensile vibration of O−H, the characteristic absorption peak at 2903 cm −1 is from the tensile vibration of C−H, and the characteristic absorption peak at 1642 cm −1 corresponds to the tensile vibration of C�O. 40,41 Compared with CNF/PVA films, the absorption peak of CNF-PVA composite films at 1642 cm −1 increases, which demonstrates that CNF and PVA in CNF-PVA composite films are partially cross-linked. 42,43 With the CNF-PVA film as the reference, the absorption peaks of CO-CDs/CNF-PVA film and Ant/CNF-PVA film are enhanced at 3000−3600 cm −1 , indicating that CO-CDs and Ant have been successfully doped.…”

Section: Resultsmentioning

confidence: 99%

Cellulose Nanofiber/Polyvinyl Alcohol-Based pH-Responsive Films Containing Anthocyanin and Carbon Dots

Cheng,

Zhao,

Kang

et al. 2023

ACS Appl. Polym. Mater.

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Environment-responsive fluorescent materials have been widely studied in the determination and utilization of different environmental factors. Particularly, it is still challenging to develop multifunctional environment-friendly pH-responsive fluorescent materials based on biomass and renewable polymers. In this study, a pHresponsive intelligent color-changing fluorescent film based on cellulose nanofibers (CNFs)/polyvinyl alcohol (PVA) incorporated with anthocyanin (Ant) extracted from the Lycium ruthenicum fruit and amino-functionalized carbon dots (CO-CDs) was prepared. Due to the influence of Ant and CO-CDs, the mechanical properties, oxidation resistance, and UV resistance are obviously promoted. Under different pH conditions, the composite film exhibits obvious pH-dependent color change and fluorescence color change. Its fluorescence intensity ratio (F 550 /F 450 ) varies linearly with pH at 1−6 and 6−13. Thereby, qualitative and quantitative perception of environmental pH change can be realized by using the composite film. In food trial, with the extension of shrimp storage time, both the visual color and fluorescence emission color of the film change evidently. The film can delay deterioration. The Ant/CO-CDs/CNF-PVA film, as a pH-responsive smart color-changing fluorescent film, has a potential application value in the fields of intelligent packaging, agriculture, and pH sensing.

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Section: Resultsmentioning

confidence: 99%

Cellulose Nanofiber/Polyvinyl Alcohol-Based pH-Responsive Films Containing Anthocyanin and Carbon Dots

Cheng,

Zhao,

Kang

et al. 2023

ACS Appl. Polym. Mater.

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“…In the realm of ethanol dehydration (water-ethanol mixtures), a diverse range of hydrophilic polymer membranes have been extensively investigated for PV applications. Some examples of such membranes include poly (vinyl alcohol) (PVA) [17], polyelectrolyte complex (PEC) [50], polyamide (PA) [51], polyimide (PI) [52,53], cellulose [54], chitosan, polyacrylonitrile (PAN) [38], and sodium alginate (SA) [55], among others. As shown in Table 1, these membranes have demonstrated promising potential for the separation of traces of water in ethanol mixtures in PV processes at different operating temperatures.…”

Section: Polymeric Membranesmentioning

confidence: 99%

“…Additionally, the water solubility of PVA leads to membrane swelling in aqueous media, which can be mitigated through various crosslinking methods; however, this often comes at the expense of reduced permeation flux [17]. Consequently, numerous approaches have been explored to enhance the separation performance of PVA membranes, encompassing cross-linking, filling, and chemical modification techniques [2,17,54].…”

Section: Hydrophilic Polymersmentioning

confidence: 99%

Ongoing Progress on Pervaporation Membranes for Ethanol Separation

Imad,

Castro-Muñoz

2023

Membranes

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Ethanol, a versatile chemical extensively employed in several fields, including fuel production, food and beverage, pharmaceutical and healthcare industries, and chemical manufacturing, continues to witness expanding applications. Consequently, there is an ongoing need for cost-effective and environmentally friendly purification technologies for this organic compound in both diluted (ethanol-water–) and concentrated solutions (water-ethanol–). Pervaporation (PV), as a membrane technology, has emerged as a promising solution offering significant reductions in energy and resource consumption during the production of high-purity components. This review aims to provide a panorama of the recent advancements in materials adapted into PV membranes, encompassing polymeric membranes (and possible blending), inorganic membranes, mixed-matrix membranes, and emerging two-dimensional-material membranes. Among these membrane materials, we discuss the ones providing the most relevant performance in separating ethanol from the liquid systems of water–ethanol and ethanol–water, among others. Furthermore, this review identifies the challenges and future opportunities in material design and fabrication techniques, and the establishment of structure–performance relationships. These endeavors aim to propel the development of next-generation pervaporation membranes with an enhanced separation efficiency.

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Polyamide/polyethylene thin film composite (PA/PE-TFC) NF membranes prepared from reverse-phase interface polymerization (RIP) for improved Mg(II)/Li(I) separation

Wang

Dong

et al. 2023

Desalination

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Robust and water-selective natural-cellulose-nanofiber-reinforced polyvinyl alcohol composite membranes for pervaporation of isopropanol/water mixtures

Cited by 7 publications

References 37 publications

Cellulose Nanofiber/Polyvinyl Alcohol-Based pH-Responsive Films Containing Anthocyanin and Carbon Dots

Cellulose Nanofiber/Polyvinyl Alcohol-Based pH-Responsive Films Containing Anthocyanin and Carbon Dots

Ongoing Progress on Pervaporation Membranes for Ethanol Separation

Polyamide/polyethylene thin film composite (PA/PE-TFC) NF membranes prepared from reverse-phase interface polymerization (RIP) for improved Mg(II)/Li(I) separation

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