Reusable, salt-tolerant and superhydrophilic cellulose hydrogel-coated mesh for efficient gravity-driven oil/water separation

Ao, Chenghong; Hu, Rui; Zhao, Jing; Zhang, Xiaofang; Li, Qingye; Xia, Tian; Zhang, Wei; Lu, Canhui

doi:10.1016/j.cej.2018.01.045

Cited by 146 publications

(59 citation statements)

References 36 publications

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Section: Hydrogels For Environmental Applicationsmentioning

confidence: 99%

“…Oil spills in oceans are a great threat to aquatic life. Ao et al (Figure C) rationally designed an environmentally benign, highly super‐hydrophilic, underwater super‐oleophobic, and highly salt‐tolerant cellulose‐based hydrogel for gravity‐driven oil/water separation . The oil‐repelling properties presented underwater prevents the oil‐blockage of the hydrogel pores and effectively screens the higher‐density water continuously via gravity.…”

Section: Hydrogels For Environmental Applicationsmentioning

confidence: 99%

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Hydrogels for Medical and Environmental Applications

2020

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Hydrogels are heavily‐hydrated 3D microliths having loose, porous structures. Unlike organogels, elastomers, and carbohydrates, hydrogels are structures with water as a continuous phase/solvent. Being water‐based, they provide a lot of scope for facile improvizations in their structure and in introducing chemical functionalities. They can house various functional materials in their highly porous networks, making them potential candidates for diverse applications. Various possibilities in using different starting materials for hydrogels are described herein, and it is shown how choosing and optimizing these components that make up the hydrogel can modify their properties. Studying hydrogels and their formulations will enable the understanding of their multifunctional properties. External stimuli‐responsive and functional systems can be designed out of these microliths to suit a wide range of applications like biosensing, cancer therapy, regenerative medicine, drug delivery, environmental parameter sensing, water desalination, heavy‐metal adsorption, and water treatment. Environmental degradation is occurring at an alarming rate, cascading the adverse effects on the environment but also causing detrimental effects in public health. In this review, multiple perspectives from state‐of‐the‐art literature are brought together to examine hydrogels as very powerful, sustainable, cost‐effective, and simple solutions for the betterment of the environment and subsequently, public health.

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Section: Hydrogels For Environmental Applicationsmentioning

confidence: 99%

Section: Hydrogels For Environmental Applicationsmentioning

confidence: 99%

Hydrogels for Medical and Environmental Applications

2020

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“…Without the inherent shielding property caused by an air barrier, superhydrophilic/under superoleophobic membranes are directly exposed to harsh environments. The OCAs of a variety of such chemically durable superwettable membranes were measured by similar testing methods based on long‐term immersion . For a robust polyionized hydrogel coating composed of PAAS‐ g ‐PVDF immersed in neutral water for 200 days, the underwater crude oil CAs and the adhesive forces remained stable .…”

Section: Robust Superwettable Membranes For Oil–water Separationmentioning

confidence: 99%

“…Finally, although the abovementioned testing strategies are based on measuring contact angles (Figure a,b) or measuring the change in oil–water (non‐corrosive) separation performance after corrosion (Figure c), which reflect chemical resistance, the practical separation of a variety of complex oil–water mixtures composed of corrosive solutions or organic solvents to imitate real harsh conditions also makes sense (Figure d). Several separation systems especially for corrosive water–oil mixtures, water–organic solvents mixtures, and corrosive water–organic solvents mixtures have been established.…”

Section: Robust Superwettable Membranes For Oil–water Separationmentioning

confidence: 99%

Recent Advances in Robust Superwettable Membranes for Oil–Water Separation

Lin

Hong

2019

Adv Materials Inter

117

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Over the past decade, much progress has been made in the application of multifunctional membranes with special wettability for the separation of oil–water mixtures. This progress has been driven by frequent oil spill accidents and oily wastewater, which are enormous threats to the vulnerable aquatic environment. The design of permeable superwettable membranes for oil–water separation has been inspired by the development of highly wetting/nonwetting interfaces, but these membranes are susceptible to factors such as mechanical forces, chemical corrosion, biological fouling, and other environmental influences. Considering the complex and harsh environments that superwettable membranes must endure during the separation process, membrane durability against the loss of superwettability is critical in prolonging the life of an oil–water filtration system. Although significant advances in superwettable membranes have been made, the robustness issue remains challenging and has become a focus of many investigations. Covering nearly all publications concerning “robust, durable, usable, resistant, tolerant, or antifouling oil–water separation” published in the last five years, this work is intended as an introduction for new researchers wishing to create durable superwettable membranes for oil–water separation, as well as providing perspectives and guidance for future research in several logical directions.

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“…This innovative study provided a simple way for the design of next-generation functional materials for efficient oil/ water separation. [83][84][85][86][87][88][89][90] For instance, Yan et al developed a facile yet effective way to fabricate hydrogel-coated meshes for efficient separation of a wide range of oil-in-water mixtures. Sci.…”

Section: Liquid/liquid Separationmentioning

confidence: 99%

Recent Advances in Bioinspired Gel Surfaces with Superwettability and Special Adhesion

Zhang

Zhao

et al. 2019

Advanced Science

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Engineering surface wettability is of great importance in academic research and practical applications. The exploration of hydrogel‐based natural surfaces with superior properties has revealed new design principles of surface superwettability. Gels are composed of a cross‐linked polymer network that traps numerous solvents through weak interactions. The natural fluidity of the trapped solvents confers the liquid‐like property to gel surfaces, making them significantly different from solid surfaces. Bioinspired gel surfaces have shown promising applications in diverse fields. This work aims to summarize the fundamental understanding and emerging applications of bioinspired gel surfaces with superwettability and special adhesion. First, several typical hydrogel‐based natural surfaces with superwettability and special adhesion are briefly introduced, followed by highlighting the unique properties and design principles of gel‐based surfaces. Then, the superwettability and emerging applications of bioinspired gel surfaces, including liquid/liquid separation, antiadhesion of organisms and solids, and fabrication of thin polymer films, are presented in detail. Finally, an outlook on the future development of these novel gel surfaces is also provided.

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Reusable, salt-tolerant and superhydrophilic cellulose hydrogel-coated mesh for efficient gravity-driven oil/water separation

Cited by 146 publications

References 36 publications

Hydrogels for Medical and Environmental Applications

Hydrogels for Medical and Environmental Applications

Recent Advances in Robust Superwettable Membranes for Oil–Water Separation

Recent Advances in Bioinspired Gel Surfaces with Superwettability and Special Adhesion

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