Exploration and preparation of multifunctional bamboo based on a green wax-based composite system

Piao, Xixi; Duan, Xinpeng; Xie, Meihua; Jin, Chunde; Wang, Zhe

doi:10.1016/j.colsurfa.2021.127913

Cited by 8 publications

(2 citation statements)

References 29 publications

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“…The melting point of paraffin is generally 60-70 • C, and it is frozen at room temperature; therefore, it has a lower loss rate. A protective film was formed on the bamboo surface to prevent water entrance and mildew growth [32].…”

Section: Analysis Of Paraffin Lossmentioning

confidence: 99%

Effect of Paraffin Impregnation Modification on Bamboo Properties and Microstructure

Huang

Liu

et al. 2023

Forests

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Phase-change energy-storage paraffin regulates the thermal management of buildings, and the material can regulate room temperature as it absorbs and discharges heat. As a porous adsorbent material, bamboo has high permeability. The aim of this study was to increase the amount of paraffin inside bamboo and the latent heat of the phase change. It was performed using vacuum pressurization (VP) and ultra-high-pressure (UHP) impregnation treatments. The effect of UHP impregnation and properties of bamboo were studied. The weight gain, paraffin loss and dimensional changes were measured and compared. The morphology of UHP-impregnated bamboo were characterized using X-ray diffraction (XRD), differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The main conclusions are as follows: After UHP impregnation, the highest weight gain was 42%. The loss of paraffin was low, and a high weight percentage gain was maintained. The crystallinity of cellulose decreased to 24% at 100 MPa. The latent heat of the bamboo slices was up to 25.66 J/g at 50 MPa, and the phase change temperature was close to room temperature. At 150 MPa, the hydroxyl content was reduced, and the hydrophilicity decreased. In addition, the content of substances such as hemicellulose in the amorphous zone was reduced under UHP, no new characteristic peaks appeared, and no chemical modifications occurred. The vascular bundles were compressed and dense, and the pores and cell gaps decreased. The thin-walled cells were deformed, and the original cell structure was completely destroyed. The surface of the cells was wrapped or covered with paraffin, confirming that the paraffin could impregnate the bamboo cells under UHP. Therefore, bamboo impregnated with paraffin can regulate temperature and save energy in buildings. It is resistant to biological attacks, and UHP improves the impregnation efficiency.

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Section: Analysis Of Paraffin Lossmentioning

confidence: 99%

Effect of Paraffin Impregnation Modification on Bamboo Properties and Microstructure

Huang

Liu

et al. 2023

Forests

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“…Unfortunately, biomass materials such as wood are easily affected by decay fungi, mildew fungi, insects, water, UV, and other factors when applied in outdoor environments [3][4][5]. In particular, mildew on the surface of wood negatively affects the appearance and practical use of wood and wood-based engineered products [6]. At present, chemical Polymers 2024, 16, 313 2 of 14 modification and physical modification are the two main solutions for preventing wood mildew, and the widely applied operations include thermal modification, soaking, and dipping methods.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Mildew-Resistant Wood with Multi-Functional Properties Based on In Situ Growth of Metal–Organic Frameworks

Liang,

Zhang,

et al. 2024

Polymers

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Wood is easily affected by decay fungi, mildew fungi, insects, water, UV, and other factors when used outdoors. In particular, mildew on the surface of wood negatively affects the appearance and practical use of wood or wood-based engineered products. In recent years, as a class of popular crystalline materials, metal–organic frameworks (MOFs) have been widely applied in electrochemistry, adsorption, anti-mildew efforts, and other areas. In this study, we first grew a Co-based metal–organic framework (Co-MOF) in situ on a wood surface and subsequently converted the Co-MOF in situ into a cobalt–nickel double hydroxide layer, which formed micro- and nanohierarchical composite structures on the wood surface. The low surface energy of the CoNi-DH@wood was further modified via impregnation with sodium laurate to obtain the superhydrophobic wood (CoNi-DH-La@wood). We characterized the microstructure, chemical composition, water contact angle, and anti-mold properties of the CoNi-DH-La@wood using SEM, XRD, XPS, water contact angle tests, and anti-fungal tests. The SEM, XRD, and XPS results confirmed that the metal–organic framework was coated on the wood surface, with the long-chain sodium laurate grafted onto it. The CoNi-DH-La@wood had a water contact angle of 151°, demonstrating excellent self-cleaning ability. In addition, the fabricated superhydrophobic balsa wood exhibited excellent chemical and environment stability. Lastly, the CoNi-DH-La@wood exhibited excellent anti-mildew properties in a 30-day anti-mildew test because the superhydrophobic coating was successfully coated on the wood surface. In summary, this work presents an attractive strategy for obtaining wood with superhydrophobic properties at room temperature, thereby endowing the wood or wood-based engineered products with excellent anti-mildew properties.

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How does surfactant affect the hydrophobicity of wax-coated wood?

Ning

Zhang²,

Zhang³

et al. 2022

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Exploration and preparation of multifunctional bamboo based on a green wax-based composite system

Cited by 8 publications

References 29 publications

Effect of Paraffin Impregnation Modification on Bamboo Properties and Microstructure

Effect of Paraffin Impregnation Modification on Bamboo Properties and Microstructure

Fabrication of Mildew-Resistant Wood with Multi-Functional Properties Based on In Situ Growth of Metal–Organic Frameworks

How does surfactant affect the hydrophobicity of wax-coated wood?

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