High energy surface as a receptor in electrospinning: A good switch for hydrophobicity to hydrophilicity

Li, Xiaoxia; Tian, Dan; He, Ji‐Huan

doi:10.2298/tsci191120107l

Cited by 15 publications

(3 citation statements)

References 46 publications

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“…Nano-scale surface morphology greatly affects a surface’s chemistry property ( Marmur, 2004 ; Li X.-X. et al, 2021 ), friction property ( Cao et al, 2021 ; Bains et al, 2020 ), and reflection property ( Selkowitz 2021 ).…”

Section: Methodsmentioning

confidence: 99%

Intelligent Nanomaterials for Solar Energy Harvesting: From Polar Bear Hairs to Unsmooth Nanofiber Fabrication

Wang

2022

Front. Bioeng. Biotechnol.

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Polar bears can live in an extremely cold environment due to their hairs which possess some remarkable properties. The hollow structure of the hair enables the bear to absorb energy from water, and the white and transparent hairs possess amazing optical properties. However, the surface morphology function of bear hairs has been little-studied. Herein, we demonstrate that the micro-structured scales distributed periodically along the hair can absorb maximal radiative flux from the Sun. This polar bear hair effect has the ability for the hair surface not to reflect radiation with a wavelength of about 500 nm. Mimicking the polar bears’ solar performance in the fabrication of nanofibers will certainly stimulate intelligent nanomaterials for efficient solar energy absorption. Therefore, a new technology is discussed in this work for the fabrication of periodic unsmooth nanofibers toward solar energy harvesting.

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Section: Methodsmentioning

confidence: 99%

Intelligent Nanomaterials for Solar Energy Harvesting: From Polar Bear Hairs to Unsmooth Nanofiber Fabrication

Wang

2022

Front. Bioeng. Biotechnol.

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“…Therefore, the wettability of CNF film surface was controlled by nanofibers, resulting in hydrophilicity. With the decrease of the number of nanofibers, the wetting length of droplets decreased and the contact angle of CNF/PVA film surface increased (Li et al, 2021). Compared with the original CNF film, the hydrophobicity of CNF/PVA/PDA film was improved, and the long-chain alkyl adhered to the surface of the base film under the action of PDA self polymerization complex (Yang et al, 2012), which reduced the surface energy of the film.…”

Section: Contact Angle (Ca)testmentioning

confidence: 99%

A Superhydrophobic Moso Bamboo Cellulose Nano-Fibril Film Modified by Dopamine Hydrochloride

Zhao

et al. 2021

Front. Bioeng. Biotechnol.

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The moso bamboo fiber powder was used as raw material to prepare cellulose nano-fibril films, 5% of polyvinyl alcohol solution was used as a structural reinforcement agent, dopamine hydrochloride (DA) was used as a surface adhesive, and hexadecyl trimethoxy silane was used as a surface modifier. The superhydrophobic films were prepared by vacuum filtration and impregnation. The results showed that the water contact angle on the surface of the film could reach 156°. The microstructure and chemical composition of the film surface was further studied by scanning electron microscopy (SEM), Fourier transforms infrared spectroscopy (FTIR), and roughness measurement The scanning electron microscopy images showed that the nanofibers on the surface of Cellulose nanofibers film were arranged and randomly distributed, thus forming a dense network interwoven structure. In PDA hydrophobic modification solution, an Hexadecyltrimethoxysilane was hydrolyzed to a hexadecyl silanol to obtain the polar terminal hydroxyl of Hexadecyl silanol molecule. The -OCH3 terminal group of HDTMS reacted with hydroxyl/H2O to form a silanol (Si-OH) bond and further condensed to form a Si-O-Si network. In addition, due to the hydrophilicity of the surface of the nano cellulose film, a large amount of—OH was adsorbed on the surface of the nano cellulose film, resulted in the chemical connection between cetyl groups, thus realized the grafting of cetyl long-chain alkyl groups onto the fibers of the nano cellulose film.The film showed good self-cleaning and waterproof properties, which can be widely used in wet environment packaging and building.

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“…It can also produce a complex object with special mechanical and optical functions [33]. This technology predicts a rapid mass-production of various complex buildings with special nano-scale surface, similar to a lotus surface [27], to collect water from air. There was an ancient device called Fangzhu [14,15], which had the ability to collet water from air, but the technology for fabrication of the Fangzhu device was lost, and now Fangzhu's mechanism were widely studied [19,6,20].…”

mentioning

confidence: 99%

A novel bond stress-slip model for 3-D printed concretes

Liu

et al. 2022

DCDS-S

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<p style='text-indent:20px;'>This paper considers the 3D printing process as a discontinuous control system and gives a simple and coherent bond stress-slip model for a new and intelligent building 3-D printed concrete. The previous models focused on either the maximal stress or the maximal slip, however, the novel model uses an energy approach by the dimension analysis, so that the main factors affecting the bond stress-slip relationship can be clearly revealed, mainly including the concrete's properties (its porous structure and its strength), the steel bar's properties (its printing direction, its strength, its surface roughness and its geometrical property) and the printing process. It is confirmed that the proposed model, similar to the constitutive relationship in elasticity, plays a key role in concrete mechanics, and it can conveniently explain the observed phenomena from the experiment.</p>

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High energy surface as a receptor in electrospinning: A good switch for hydrophobicity to hydrophilicity

Cited by 15 publications

References 46 publications

Intelligent Nanomaterials for Solar Energy Harvesting: From Polar Bear Hairs to Unsmooth Nanofiber Fabrication

Intelligent Nanomaterials for Solar Energy Harvesting: From Polar Bear Hairs to Unsmooth Nanofiber Fabrication

A Superhydrophobic Moso Bamboo Cellulose Nano-Fibril Film Modified by Dopamine Hydrochloride

A novel bond stress-slip model for 3-D printed concretes

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