Facile Fabrication of a PDMS@Stearic Acid-Kaolin Coating on Lignocellulose Composites with Superhydrophobicity and Flame Retardancy

Wang, Zhe; Shen, Xiaoping; Qian, Temeng; Wang, Junjie; Zhang, Jiayi; Jin, Chunde

doi:10.3390/ma11050727

Cited by 16 publications

(7 citation statements)

References 38 publications

(42 reference statements)

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“…To the best of our knowledge, research in this area has not provided a very extensive previous background and few studies or patents cover this field of interest [8][9][10][11][12]35].…”

Section: Treatments Evaluationmentioning

confidence: 99%

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Low Fluorinated Oligoamides for Use as Wood Protective Coating

et al. 2022

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New highly hydrophobic fluorinated oligoamides were synthesized and studied as materials for the protection of non-varnishable wooden artifacts. The new oligoamides were designed to achieve the best performance (including high chemical affinity to the wood material) and the lowest environmental impact. In order to minimize the risk of bioaccumulation, short perfluoroalkyl side chains were reacted with oligoethylene L-tartaramide (ET), oligoethylene adipamide-L-tartaramide (ETA), oligoethylene succinamide-L-tartaramide (EST), oligoethylene succinamide (ES), and oligodiethylenetriamino-L-tartaramide (DT). Favorable reaction conditions were also adopted to obtain low molecular weight compounds characterized by non-film-forming properties and solubility or dispersibility in environmentally friendly organic solvents. Their behavior in terms of modification of the wood surface characteristics, such as wettability, moisture absorption, and color, was analyzed using a specific diagnostic protocol to rapidly obtain preliminary, but reliable, results for optimizing a future synthesis of new and tailored protectives. The influence of different monomer units on the reactivity, solubility, and hydrophobic properties of different oligoamides was compared showing ESF (contact angle 138.2°) and DF (132.2°) as the most effective products. The study of stability to photochemical degradation confirms ESF as promising protective agents for artefacts of historical and artistic interest in place of long-chain perfluoroalkyl substances (PFAS), products currently subject to restrictions on use.

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“…To the best of our knowledge, research in this area has not provided a very extensive previous background and few studies or patents cover this field of interest [8][9][10][11][12]35].…”

Section: Treatments Evaluationmentioning

confidence: 99%

“…In general, the use of nanotechnologies in the treatment of wood promotes deep penetration by significantly modifying the properties of the wood [11]. Furthermore, superhydrophobic surfaces with flame retardancy has been obtained with polydimethylsiloxane (PDMS) and stearic acid (STA)-modified kaolin (KL) particles [12].…”

Section: Introductionmentioning

confidence: 99%

Low Fluorinated Oligoamides for Use as Wood Protective Coating

et al. 2022

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“…Fire conditions are best simulated using a heat flux of 50 kW/m 2 . This is confirmed by the majority of scientific papers, e.g., [33][34][35], that examined organic polymers on a cone calorimeter using a heat flux of 50 kW/m 2 , and almost all scientific papers, e.g., [36][37][38], examined the natural and organic polymers using a horizontal orientation. Also, most surface mounted electrical cables in buildings are horizontally oriented.…”

Section: Methodsmentioning

confidence: 57%

A New Approach to the Assessment of the Reduction in Visibility Caused by Fires of Electrical Cables

Martinka

Rantuch

Rolinec

et al. 2019

Safety

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Electricity is the most important form of household energy and one of the most important forms of energy for industry and transport. Electrical distribution in construction and transport is almost exclusively implemented using electrical cables. One of the unresolved problems associated with electrical cables is the release of smoke and the resulting reduction of visibility in case of fire in the area. In this study, a new approach was developed to assess the reduction of visibility in an area affected by an electrical cable fire. This approach is based on the determination of the critical ratio of smoke volume (in the smoke layer and exhausted from the fire compartment) to the length of the burning cable, through which the visibility of reflective and illuminated signs was reduced to a lower limit value (a standard of 10 m). The input data for this approach was the extinction area of the smoke released from one meter of burning cable and the length of the cables in the area. This approach was used to test two power cables (CHKE-V J3x1.5 and CHKE-R J3x1.5) and one signal cable J-H(St)H 1 × 2 × 0.8 with the B2ca, s1, d1, a1 fire reaction class. The smoke extinction area of the examined cables was determined using a cone calorimeter at a heat flux of 50 kW/m2. The obtained data showed that in order to maintain a visibility of 10 m for reflective signs, the critical ratio of smoke volume to length of burning cable was 7.5 m3/m. For illuminated signs, the critical ratio was 2.8 m3/m. The relationship between burning length and visibility allows the calculation of visibility in the fire compartment affected by cable fire only from cables length.

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“…PDMS-stearic acid-modified kaolin-coated LC attains contact angles of 156°. Due to kaolin particles, it also displays good flame retardant properties [ 74 ].…”

Section: Special Surfacesmentioning

confidence: 99%

Superhydrophobic Natural and Artificial Surfaces—A Structural Approach

et al. 2018

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Since ancient times humans observed animal and plants features and tried to adapt them according to their own needs. Biomimetics represents the foundation of many inventions from various fields: From transportation devices (helicopter, airplane, submarine) and flying techniques, to sports’ wear industry (swimming suits, scuba diving gear, Velcro closure system), bullet proof vests made from Kevlar etc. It is true that nature provides numerous noteworthy models (shark skin, spider web, lotus leaves), referring both to the plant and animal kingdom. This review paper summarizes a few of “nature’s interventions” in human evolution, regarding understanding of surface wettability and development of innovative special surfaces. Empirical models are described in order to reveal the science behind special wettable surfaces (superhydrophobic /superhydrophilic). Materials and methods used in order to artificially obtain special wettable surfaces are described in correlation with plants’ and animals’ unique features. Emphasis is placed on joining superhydrophobic and superhydrophilic surfaces, with important applications in cell culturing, microorganism isolation/separation and molecule screening techniques. Bio-inspired wettability is presented as a constitutive part of traditional devices/systems, intended to improve their characteristics and extend performances.

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Facile Fabrication of a PDMS@Stearic Acid-Kaolin Coating on Lignocellulose Composites with Superhydrophobicity and Flame Retardancy

Cited by 16 publications

References 38 publications

Low Fluorinated Oligoamides for Use as Wood Protective Coating

Low Fluorinated Oligoamides for Use as Wood Protective Coating

A New Approach to the Assessment of the Reduction in Visibility Caused by Fires of Electrical Cables

Superhydrophobic Natural and Artificial Surfaces—A Structural Approach

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