Preparation of lignin nanospheres based superhydrophobic surfaces with good robustness and long UV resistance

Li, Mengmeng; Huang, Wentao; Ren, Changying; Wu, Qiang; Wang, Siqun; Huang, Jingda

doi:10.1039/d2ra01245f

Cited by 13 publications

(5 citation statements)

References 41 publications

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“…As shown in Figure S10, the results elucidated unambiguously that there was no significant reduction of WCAs and WSAs after 24 h, representing excellent UV resistance. We could attribute such UV-resistant behavior to the introduction of RB-CDs, which contained abundant benzene rings, carbonyl, double bonds, and other conjugated structures beneficial to absorb UV radiation. , …”

Section: Results and Discussionmentioning

confidence: 99%

“…We could attribute such UV-resistant behavior to the introduction of RB-CDs, which contained abundant benzene rings, carbonyl, double bonds, and other conjugated structures beneficial to absorb UV radiation. 63,64 To further evaluate the robustness of PDMS/RB-CDs/ZIF-8@OMMT in a comprehensive way, a thermostability test was conducted by heating for 2 h in an oven in the temperature range of room temperature to 200 °C. As shown in Figure S11, no significant decrease of WCAs could be observed when the temperature reached 200 °C, while a slight increase (0.6°) of WSAs occurred.…”

Section: Robust Evaluation Of Pdms/rb-cds/zif-8@ Ommtmentioning

confidence: 99%

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Multifunctional Integrated Superhydrophobic Coatings with Unique Fluorescence and Micro/Micro/Nano-Hierarchical Structures Enabled by In Situ Self-Assembly

Shi

Wang

Meng

et al. 2023

ACS Appl. Mater. Interfaces

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Conferring versatility to superhydrophobic materials is extremely desirable to advance their utility. Herein, we have developed a superhydrophobic material with montmorillonite as microskeleton supports and in situ grown ZIF-8 nanoparticles and loaded them with newly developed fluorescent carbon dots. In situ growth of the ZIF-8 on OMMT constructs a dense nanoscale rough structure and meanwhile self-assembly generates abundant microporous, thus forming unique hierarchical microporous/microsheet/nanoparticle tri-tier micro and nano structures. Then the multifunctional superhydrophobic coating is fabricated by a facile spraying technique using polydimethylsiloxane (PDMS) as a multifunctional polymer binder. The PDMS/RB-CDs/ZIF-8@OMMT exhibits superhydrophobicity with a water contact angle of 164.7° and a water sliding angle of 1.4°, which also possesses good self-cleaning performance. Moreover, novel carbon dots are developed in this work which can confer unique fluorescent properties and photothermal properties to materials. Fluorescence characterization reveals the multiple emission peaks among 300–800 nm and excitation wavelength dependence and independence. Photothermal experiments unveil an efficient light-to-heat conversion caused by the light traps and absorption wavelengths associated with photothermal heating. Benefiting from the dense microporous/microsheet/nanoparticle structures, the superhydrophobicity is still maintained after 120 cycles of abrasion. Moreover, electrochemical impedance spectroscopy (EIS) reveals a significant increase in impedance, which is associated with excellent corrosion resistance. The superhydrophobic coating also exhibits superior UV resistance and good thermal stability. Multifunctional fluorescent superhydrophobic materials will enable the development of various and potential applications in different fields.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Robust Evaluation Of Pdms/rb-cds/zif-8@ Ommtmentioning

confidence: 99%

Multifunctional Integrated Superhydrophobic Coatings with Unique Fluorescence and Micro/Micro/Nano-Hierarchical Structures Enabled by In Situ Self-Assembly

Shi

Wang

Meng

et al. 2023

ACS Appl. Mater. Interfaces

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“…This was because lignin contained some functional groups such as benzene ring, carbonyl, double bond, and other conjugated structures, which were able to absorb certain UV rays [ 40 ]. The CNC@SiO 2 @PL@PDMS coating could endure 8 h before losing superhydrophobicity because PDMS also possessed a UV resistance effect [ 41 ], showing ultra-strong UV resistance ( Figure 6 d–f). It could be seen in Table 3 , the CNC@SiO 2 @PL@PDMS coating showed better UV resistance than some similar work.…”

Section: Resultsmentioning

confidence: 99%

Construction of CNC@SiO2@PL Based Superhydrophobic Wood with Excellent Abrasion Resistance Based on Nanoindentation Analysis and Good UV Resistance

et al. 2023

Self Cite

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Construction of superhydrophobic woods with high abrasion resistance is still a major challenge, and micro analysis for abrasion resistance is scarce. To improve these issues, cellulose nanocrystals (CNC)@SiO2@phosphorylated lignin (PL) rods were prepared by SiO2 in situ generated on CNC, and then the modified lignin attached to the CNC@SiO2 rods surface. Subsequently, the superhydrophobic coating was constructed using hydrophobic modified CNC@SiO2@PL rods as the main structural substance by simple spraying or rolling them onto wood surfaces, and both polydimethylsiloxane (PDMS) and epoxy resin were used as the adhesives. The resulting coating had excellent superhydrophobic properties with a water contact angle (WCA) of 157.4° and a slide angle (SA) of 6°. The introduced PL could enhance ultraviolet (UV) resistance of the coating due to the presence of these groups that absorbed UV light in lignin. In the abrasion resistance test, compared with the SiO2/PL coating, the abrasion resistance of the one with CNC was much higher, suggesting that CNC could improve the abrasion resistance of the coating due to its high crystallinity and excellent mechanical strength. The coating with PDMS performed better than the one with epoxy resin because the soft surface could offset part of the external impact by deformation in the abrasion process. This was also consistent with the results of the nanoindentation (NI) tests. In view of the simple preparation and good performance, this superhydrophobic wood will have broad application potential.

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“…Yang et al firstly spray-coated an epoxy resin/acetone solution onto 1-Tetradecanol (TD)-decorated delignified wood (DW) substrate, and then further deposited SiO2 to obtain the superhydrophobic TD/DW composite (Figure 3e) [147]. Xue et al spray-coated a SiO2@HDTMS superhydrophobic spray solution of SiO2, an inorganic aluminum phosphate (AP) adhesive layer and Of course, the spray-coating method can be utilized by combining with other preparation methods to fabricate SHWSs, such as UV polymerization [75], chemical vapor deposition (CVD) [76,77,151], plasma [152] and immersion [153]. Spray-coating, as a widely used approach, is not limited by surface structures or the shapes of substrates, which is suitable for various substrates (i.e., wood, glass, metals, ceramics and papers).…”

Section: Spray-coatingmentioning

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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Preparation of lignin nanospheres based superhydrophobic surfaces with good robustness and long UV resistance

Abstract: Lignin nanospheres could be taken main structural materials and cellulose nanocrystals as a reinforcer for preparation of superhydrophobic surfaces with good robustness and long UV resistance.

Cited by 13 publications

References 41 publications

Multifunctional Integrated Superhydrophobic Coatings with Unique Fluorescence and Micro/Micro/Nano-Hierarchical Structures Enabled by In Situ Self-Assembly

Multifunctional Integrated Superhydrophobic Coatings with Unique Fluorescence and Micro/Micro/Nano-Hierarchical Structures Enabled by In Situ Self-Assembly

Construction of CNC@SiO2@PL Based Superhydrophobic Wood with Excellent Abrasion Resistance Based on Nanoindentation Analysis and Good UV Resistance

Superhydrophobic Wood Surfaces: Recent Developments and Future Perspectives

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