Sustainable, Reusable, and Superhydrophobic Aerogels from Microfibrillated Cellulose for Highly Effective Oil/Water Separation

Zhou, Sukun; Liu, Pengpeng; Wang, Meng; Zhao, Hong; Yang, Jun; Xu, Feng

doi:10.1021/acssuschemeng.6b01075

Cited by 209 publications

(91 citation statements)

References 46 publications

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“…The reusability, durability and efficiency of oil water separation most likely stems from the strong covalent bonds on the cellulose surface as well as the excellent mechanical properties of the cellulose nanocrystals such as the strength, stiffness and wear resistance. Similar to the study by Zhou et al [51], these works demonstrate the capability of superhydrophobic CNCs when geared towards applications such as water contaminant separation.…”

Section: Cellulose Nanocrystals In Wettable Applicationssupporting

confidence: 73%

“…Zhou et al recently developed a superhydrophobic micro fibrillated cellulose aerogel (HMFCA) to efficiently separate oil from water [51]. In this study, silanization in an ethanol solution containing methyltriethoxysilane (MTES) was used to modify the aerogel by introducing polysiloxane groups on the surface of the HMFCAs.…”

Section: Cellulose Nanocrystals In Wettable Applicationsmentioning

confidence: 99%

“…Though, the substrate used by Huang et al [53] might pose a challenge when it comes to large scale application due to the weight and possible high cost, it is highly durable and can withstand impacts and bumps over several cycles. Those used by Zhou et al [51] and Cheng et al [52] are light-weight, readily available and can be mass produced. However, it might not be as durable as the stainless-steel material in the long run.…”

Section: Cellulose Nanocrystals In Wettable Applicationsmentioning

confidence: 99%

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Trends in Advanced Functional Material Applications of Nanocellulose

2018

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The need to transition to more sustainable and renewable technology has resulted in a focus on cellulose nanofibrils (CNFs) and nanocrystals (CNCs) as one of the materials of the future with potential for replacing currently used synthetic materials. Its abundance and bio-derived source make it attractive and sought after as well. CNFs and CNCs are naturally hydrophilic due to the abundance of -OH group on their surface which makes them an excellent recipient for applications in the medical industry. However, the hydrophilicity is a deterrent to many other industries, subsequently limiting their application scope. In either light, the increased rate of progress using CNCs in advanced materials applications are well underway and is becoming applicable on an industrial scale. Therefore, this review explores the current modification platforms and processes of nanocellulose directly as functional materials and as carriers/substrates of other functional materials for advanced materials applications. Niche functional attributes such as superhydrophobicity, barrier, electrical, and antimicrobial properties are reviewed due to the focus and significance of such attributes in industrial applications.

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Section: Cellulose Nanocrystals In Wettable Applicationssupporting

confidence: 73%

Section: Cellulose Nanocrystals In Wettable Applicationsmentioning

confidence: 99%

Section: Cellulose Nanocrystals In Wettable Applicationsmentioning

confidence: 99%

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Trends in Advanced Functional Material Applications of Nanocellulose

2018

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“…[7] Many researchers have reported significant increases in the fracture stress of bio-based composites after incorporating MFC. [1,8,9] For example, with the addition of 30wt% MFC derived from bamboo, the fracture stress and Young's modulus were increased from 20.2 MPa to 59.3 MPa and from 596 MPa to 1816 MPa, respectively. [10] Nakagaito and Yano reported that phenolic composites containing 20wt% MFC from kraft pulp to have Young's modulus of up to 370 MPa.…”

Section: Introductionmentioning

confidence: 99%

Self-healing green composites based on soy protein and microfibrillated cellulose

Kim

Netravali

2017

Composites Science and Technology

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Self-healing soy protein-microfibrillated cellulose (MFC) composites that incorporated poly(d,l-lactide-co-glycolide) microcapsules containing SPI (SPI-PLGA-MCs) as the healing agent were developed. SPI-PLGA-MCs prepared using a green solvent, ethyl acetate, had a protein loading of over 50%. Self-healing SPI-MFC (10wt%) composites containing SPI-PLGA-MCs (15wt%) had Young's modulus of about 970 MPa and strength of over 15 MPa whereas neat SPI resin had Young's modulus of 326 MPa and strength of about 8 MPa. The significantly higher tensile properties of composites compared to neat SPI resin was due to the inherent high tensile properties of MFC and excellent hydrogen bonding with SPI resin. Self-healing mechanism, i.e., healing agent (SPI) bridging the fracture surfaces of the microcracks, was observed through SEM imaging. Composites with no SPI-PLGA-MCs showed no self-healing whereas self-healing SPI composites showed 27% healing efficiency after 24 h healing. The selfhealing efficiency was noticeably lower than 48% obtained earlier for self-healing SPI resin using the same SPI-PLGA-MCs. This was because the self-healing mechanism occurs only for the SPI resin component and not for the MFC fibrils. Self-healing of green composites can extend their useful life and make it easier for them to replace conventional composites derived from petroleum.

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“…First, superhydrophobic/superoleophilic oil sorbents with a remarkable mechanical durability are frequently used for water remediation . The sorbents typically consist of bulk materials such as polyurethane (PU) sponge, melamine sponge, delignified wood, 3D tubular boron nitride (BN) cellular‐network foams, cellulose aerogels, and carbon‐based composites …”

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

115

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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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Sustainable, Reusable, and Superhydrophobic Aerogels from Microfibrillated Cellulose for Highly Effective Oil/Water Separation

Cited by 209 publications

References 46 publications

Trends in Advanced Functional Material Applications of Nanocellulose

Trends in Advanced Functional Material Applications of Nanocellulose

Self-healing green composites based on soy protein and microfibrillated cellulose

Recent Advances in Robust Superwettable Membranes for Oil–Water Separation

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