Immobilization of graphitic carbon nitride on wood surface via chemical crosslinking method for UV resistance and self-cleaning

Yuan, Bingnan; Guo, Minghui; Murugadoss, Vignesh; Song, Gang; Guo, Zhanhu

doi:10.1007/s42114-021-00235-y

Cited by 63 publications

(11 citation statements)

References 28 publications

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“…Dust accumulation on the exterior coatings will deteriorate the NIR reflective properties (red curve in Figure c), hence impairing the cooling effectiveness . Creating a superhydrophobic surface with self-cleaning ability is employed by many to alleviate this acute issue .…”

Section: Resultsmentioning

confidence: 99%

“…Dust accumulation on the exterior coatings will deteriorate the NIR reflective properties (red curve in Figure 4c), hence impairing the cooling effectiveness. 53 Creating a superhydrophobic surface with self-cleaning ability is employed by many to alleviate this acute issue. 54 The porous P-FPAE6 film showed a water contact angle (WCA) of 160°(Figure S11a), sufficient to be qualified as a superhydrophobic surface.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Self-Cleaning Red-Toned Perylene Poly(aryl ether) Film with Superior NIR Reflectance for Passive Radiative Cooling

Yang,

Cai,

Tang

et al. 2023

ACS Sustainable Chem. Eng.

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Radiative cooling provides a low-energy consumption remedy for the urban heat island effect. However, most radiative cooling materials use light-colored surfaces to achieve higher reflectivity, which not only causes light pollution problems but also degrades performance after surface contamination. Here, we through the design of the polymer structure used perylene diimide with coloration ability to prepare the crimson polymer perylene poly(aryl ether) (P-FAPE) by simple condensation reaction and prepared the superhydrophobic film with a porous structure by the method of nonsolvent-induced phase transformation. The polymer film has high near-infrared reflectance, with a maximum reflectance of 93% in the near-infrared region and emissivity reaches 95–98% in the atmospheric transmission window. In three days of outdoor testing, the P-FAPE6 film showed an average temperature drop of 5.72–8.52 °C compared to ambient temperature. Importantly, the water contact angle of the P-FAPE6 film is 160°, and the self-cleaning effect prevents the film surface from dirt contamination or wetting in long-term outdoor use. The P-FAPE6 film also demonstrated long-term stability, a V-0 rating for fire resistance in the UL-94 combustion test, which is promising in applications for cooling building facades, outdoor tents, and vehicle sunshades.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Self-Cleaning Red-Toned Perylene Poly(aryl ether) Film with Superior NIR Reflectance for Passive Radiative Cooling

Yang,

Cai,

Tang

et al. 2023

ACS Sustainable Chem. Eng.

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“…This could further benefit the investigations of wood-based composites, meaning that not only regenerable wood-based composites, which are widely investigated, , but also wood waste for lignocellulosic fillers would be utilized. Additionally, these kinds of woodlike material coatings would be much more easily renovated if damaged than the chemically modified wood surfaces used for UV resistance . Wood-mimic properties are already widely investigated, and new applications arise daily.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, these kinds of woodlike material coatings would be much more easily renovated if damaged than the chemically modified wood surfaces used for UV resistance. 50 Wood-mimic properties are already widely investigated, and new applications arise daily. However, to the authors' knowledge, hybrid lignocellulosic fillers for UVcurable resins have not been investigated, while this has been done in thermoplastics.…”

Section: ■ Introductionmentioning

confidence: 99%

New Reinforcing Approach for Biobased UV-Curing Resins: Hybrid Lignocellulose Fillers with Improved Synergy and Wood Structure Mimics

Barkāne

Kampe

Gaidukovs

2023

ACS Sustainable Chem. Eng.

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Lignocellulosic fillers have been widely investigated for various polymer resin applications since they have great potential for using wood biomass and recycled plastics. However, besides cellulose nanocrystals (CNC) and nanofibrils (CNF), not much of the other lignocellulose has been used for UV-curing resins. Even more so, none has been used in hybrid lignocellulose combination compositions. In the present work, the effects of hybrid lignocellulose fillers such as lignin (LN)/CNC/CNF/hemicellulose (HC) with ratio-varying compositions on UV-curing biobased resins have been investigated for wood-mimic material coating applications. The hybrid filler effects on the macromolecular chain network, surface morphology, thermomechanical properties, and thermostability were carefully studied. A combination of scanning electron microscopy, DMA Cole–Cole plot, contact angle, etc., allowed getting a sense of hybrid filler distribution and interaction within the polymer matrix. It was identified that an increase in the HC content of up to 38% contributes to more even particle distribution and achieves a maximum double bond conversion rate of about 80%. HC also contributes to porous surface structure, while CNC smooths surface morphology, and, in turn, CNF increases defects. Thermomechanical testing revealed the unique benefit of hybrid reinforcement, showing higher results than single-filler compositions despite the general decrease after incorporation of 5 wt % LN. The storage modulus showed a fourfold increase for 5 wt % LN composition. The observed enormous property enhancement has been attributed to the benefits of hybrid fillers, which mitigate characteristic radical scavenging properties of LN and strongly reduce general filler aggregation, allowing more even filler dispersion while also improving filler–matrix interface synergy. Seventeen different compositions clearly, in comparison to single fillers, show the benefit of hybrid lignocellulosic reinforcement and testify to the ability to precisely tune up material performance and achieve wood structure-mimicking coating materials.

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“…There are many reports on the pretreatment of cotton stalk powder using chemical or biological methods [89][90][91]. Researchers have never stopped studying the surface of biomass [92][93][94]. For example, Teng et al used bacterial liquid to pretreat cotton stalks to enhance the performance of paper products [95].…”

Section: Introductionmentioning

confidence: 99%

Effects of different amounts of cellulase on the microstructure and soluble substances of cotton stalk bark

Xie

Tian

Liu

et al. 2022

Adv Compos Hybrid Mater

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There are plant cuticle and complex cell walls on the outer surface of cotton stalk bark (CSB), which reduce the efficiency of liquid penetration of CSB. To increase the permeability of liquids, these barriers need to be broken. Cellulase can selectively hydrolyze cellulose into glucose, and its action conditions are mild. Therefore, cellulase treatment is one of the excellent ways to break the CSB liquid permeation barrier. This experiment studied the effects of different amounts of cellulase treatment on the enzymatic hydrolysis products and surface of CSB. Scanning electron microscopy (SEM) and nano-CT were used to observe the changes in the microscopic morphology of CSB. Ion chromatography and an ultraviolet–visible spectrophotometer were used to determine the dissolution of CSB. The results showed that the cuticle of CSB treated with cellulase was broken, and the cell wall of phloem fibers became thinner, which increased the accessibility of liquid. The content of monosaccharide and lignin in CSB treatment solution increased with the increase of cellulase dosage. Correspondingly, the proportion of polysaccharides on the outer surface of CSB continued to decline and eventually stabilized. These experimental results can provide a reference for improving the permeability of natural fibers and the subsequent treatment effects of biomass products. Graphical abstract The pretreatment of cotton stalk barks with cellulase destroyed the dense protective structure of cell wall, and the content of monosaccharide and lignin in the treated solution increased with the increase of cellulase dosage.

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Immobilization of graphitic carbon nitride on wood surface via chemical crosslinking method for UV resistance and self-cleaning

Cited by 63 publications

References 28 publications

Self-Cleaning Red-Toned Perylene Poly(aryl ether) Film with Superior NIR Reflectance for Passive Radiative Cooling

Self-Cleaning Red-Toned Perylene Poly(aryl ether) Film with Superior NIR Reflectance for Passive Radiative Cooling

New Reinforcing Approach for Biobased UV-Curing Resins: Hybrid Lignocellulose Fillers with Improved Synergy and Wood Structure Mimics

Effects of different amounts of cellulase on the microstructure and soluble substances of cotton stalk bark

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