Biodegradable, superhydrophobic walnut wood membrane for the separation of oil/water mixtures

Xing, Tong; Dong, Changqing; Wang, Xiaodong; Hu, Xiaoying; Liu, Changrui; Lv, Hao

doi:10.1007/s11705-022-2157-z

Cited by 5 publications

(4 citation statements)

References 47 publications

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“…Wood substrates are firstly immersed in the suspension of nanoparticles. After being immersed in above suspension solutions, SHWSs can be easily obtained with further chemical modification of low-surface-energy materials [19,[47][48][49]104].…”

Section: Immersionmentioning

confidence: 99%

Superhydrophobic Wood Surfaces: Recent Developments and Future Perspectives

Gao

Wang

2023

Coatings

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Wood is a renewable material that has been widely utilized as indoor and outdoor construction and decoration material in our daily life. Although wood has many advantages (i.e., light weight, high strength, low price and easy machinability), it has some drawbacks that influence dimensional stability, cracking and decay resistance in real practical applications. To mitigate these issues, superhydrophobic surfaces have been introduced to wood substrates, creating superhydrophobic wood surfaces (SHWSs) that can improve stability, water resistance, ultraviolet radiation resistance and flame retardancy. Herein, the recent developments and future perspectives of SHWSs are reviewed. Firstly, the preparation methods of SHWSs are summarized and discussed in terms of immersion, spray-coating, hydrothermal synthesis, dip-coating, deposition, sol-gel process and other methods, respectively. Due to the characteristics of the above preparation methods and the special properties of wood substrates, multiple methods are suggested to be combined to prepare SHWSs rather than each individual method. Secondly, the versatile practical applications of SHWSs are introduced, including anti-fungi/anti-bacteria, oil/water separation, fire-resistance, anti-ultraviolet irradiation, electromagnetic interference shielding, photocatalytic performance, and anti-icing. When discussing these practical applications, the advantages of SHWSs and the reason why SHWSs can be used in such applications are also mentioned. Finally, we provide with perspectives and outlooks for the future developments and applications of SHWSs, expecting to extend the utilization of SHWSs in our daily life and industry.

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Section: Immersionmentioning

confidence: 99%

Superhydrophobic Wood Surfaces: Recent Developments and Future Perspectives

Gao

Wang

2023

Coatings

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“…Cellulose membranes from loofah were prepared in a similar way as in previous work (Xing et al 2022). About 0.5 g of the irregular inner part of the delignified loofah segments was pulped and dried to form a cellulose membrane with a length of 70 mm and a width of 50 mm, and the regular outer ring was unfolded to form a structural cellulose membrane that maintains the original loofah.…”

Section: Preparation Of Samplesmentioning

confidence: 99%

Heat treatment’s effect on the wettability of cellulose membranes via a top-down approach

Xing

Dong

et al. 2022

BioRes

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Cellulose is a potential alternative to petroleum-derived polymers, and cellulose membranes are used in many applications such as sensors, flexible materials, and functional membranes. Most bottom-up methods are energy-, chemical-, and time-intensive compared to top-down methods for preparing cellulose membranes. Additionally, most methods to improve the hydrophobicity of cellulose membranes to increase their lifetime are complex and require large amounts of organic solvents. To balance sustainability, degradability, and service life from a whole life cycle perspective, which is the biggest challenge for the industrialization of cellulose membranes, a top-down approach was used here to prepare cellulose membranes using camphor pine, walnut, and loofah materials. The effect of low temperature heat treatment on the prepared membranes’ wettability and water stability were investigated. The results showed that the water stability of loofah cellulose membrane was influenced by both surface and internal wettability due to the non-homogeneous structure. The heat treatment temperature of 200 °C for loofah cellulose membrane, 150 °C for camphor pine cellulose membrane, and 225 °C for walnut cellulose membrane was more effective.

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“…Owing to their exceptional wettability characteristics [ 3 ], superhydrophobic materials find extensive application across numerous domains, such as self-cleaning [ 4 , 5 ], anti-freezing [ 6 ], anti-corrosion and antibacterial [ 7 ], drag reduction [ 8 ], oil–water separation [ 9 , 10 ], among others, and hold tremendous potential for further development. At present, the methods of preparing superhydrophobic wood include the vapor deposition method [ 11 ], the layer-by-layer self-assembly method [ 12 ], the hydrothermal method [ 13 ], and the sol–gel method [ 14 , 15 ]. The preparation of superhydrophobic surface materials must conform to two points: one is to construct a micro–nano rough structure on the material surface.…”

Section: Introductionmentioning

confidence: 99%

Study on the Difference of Superhydrophobic Characteristics of Different Wood Furniture Substrates

et al. 2023

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To enhance the stability of wood and decrease restrictions on its use in the furniture industry, hydrophobic modification can be employed to confer waterproof, anti-fouling, and self-cleaning properties. The present study outlines the preparation of silica sol using the sol–gel method, followed by impregnation and chemical vapor deposition methods to modify the sol. After grafting 1H,1H,2H,2H-perfluoro-decyl trichlorosilane (FDTS), hydrophobic and superhydrophobic properties were imparted to the wood substrate. To explore the correlation between the surface properties of the wood substrate and superhydrophobic coatings, the densities, porosities, and surface roughness of various tree species were compared. The results showed that the sol–gel method successfully constructed hydrophobic coatings on different wood substrates, with six samples (poplar, elm, toon wood, paulownia, ashtree, and black walnut) achieving superhydrophobic surfaces, with densities ranging from 0.386 to 0.794 g/cm3, porosity ranging from 13.66 to 42.36%, roughness ranging from 4.660 to 11.244 um, and maximum water contact angle of 165.2°. Whereas beech and rosewood only reach the hydrophobic surface. Although the coatings demonstrated good resistance to water, pollutants, self-cleaning, and chemical agents, further improvements are necessary to enhance mechanical wear resistance.

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Biodegradable, superhydrophobic walnut wood membrane for the separation of oil/water mixtures

Cited by 5 publications

References 47 publications

Superhydrophobic Wood Surfaces: Recent Developments and Future Perspectives

Superhydrophobic Wood Surfaces: Recent Developments and Future Perspectives

Heat treatment’s effect on the wettability of cellulose membranes via a top-down approach

Study on the Difference of Superhydrophobic Characteristics of Different Wood Furniture Substrates

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