Increasing the water uptake of wood veneers through plasma treatment at atmospheric pressure

Wascher, Richard; Schulze, Norman; Avramidis, Georg; Militz, Holger; Viöl, Wolfgang

doi:10.1007/s00107-014-0815-7

Cited by 19 publications

(9 citation statements)

References 3 publications

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“…To overcome the threat of resistance development in lice, a physical treatment method was developed based on the concept of cold atmospheric pressure plasma (CAPP). As a key technology, CAPPs are currently used for purposes of surface modifications, like enhancement of wettability [6,7,8], precision cleaning purposes [9,10,11], or within the field of plasma medicine [12,13,14]. Known to be capable of interacting with biological surfaces and wounds, CAPPs have been developed to treat different diseases, ranging from skin diseases (e.g., [15,16,17,18]) to different cancer treatment approaches (e.g., [19,20,21]).…”

Section: Introductionmentioning

confidence: 99%

Cold Atmospheric Pressure Plasma Comb—A Physical Approach for Pediculosis Treatment

ten_Bosch

Habedank

Siebert

et al. 2018

IJERPH

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Pediculosis, that is the infestation of humans with Pediculus humanus capitis (head lice), poses a worldwide problem that is as old as mankind itself. Over the centuries, man has developed a variety of remedies, all of which have ultimately culminated in the use of chemical agents. Some of these remedies are known to produce successful results. A large portion of the effective remedies used to kill lice and their eggs contain insecticides, but there is an increasing number of reports of head lice populations revealing an increased resistance. This study presents an alternative treatment approach, the efficacy of which is based on physical effects. Cold atmospheric pressure plasmas have successfully shown their formidably wide application range within the field of plasma medicine. This study presents a plasma device in its current stage of development that is engineered as a consumer product to enable an alternative physical and insecticide-free option for the treatment of pediculosis. An efficacy study concerning different developmental stages of P. humanus humanus is presented. P. humanus humanus was chosen as a substitute test organism for P. humanus capitis due to possible laboratory rearing and high anatomic similarity. The study shows how a single stroke of the plasma device over a hair strand (approximately 22 cm in length with a weight of 1.5 g) led to mortality rates of 68.3% (50.0; 79.7) (95% CI) in the juvenile test group, a mortality rate of approx. 67.7% (54.9; 78.8) (95% CI) in the female test group, and approx. 46.7% (28.3; 65.7) (95% CI) in the male test group. When single eggs were introduced directly into the plasma for approx. 1 s, younger eggs (0–2 d) showed a higher mortality of 66.7% (42.7; 82.7) than the older (4–6 d) eggs, with 16.7% (5.6; 34.7) (CI). Furthermore, the results of a risk assessment of the device are described. The article concludes with necessary handling instructions as well as further developmental steps, derived from the results of the efficacy and the risk assessment study.

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Section: Introductionmentioning

confidence: 99%

Cold Atmospheric Pressure Plasma Comb—A Physical Approach for Pediculosis Treatment

ten_Bosch

Habedank

Siebert

et al. 2018

IJERPH

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“…As atmospheric‐pressure dielectric barrier discharges (AP‐DBDs) were further developed and studied, their applications were extended to multiple technological fields, including the functionalization of heat‐sensitive wood samples. For example, AP‐DBDs operated in N2, O2, and air were successfully used as an alternative way to sanding as well as for surface wettability modification leading to enhanced adhesion properties . Furthermore, incorporation of gaseous or liquid precursors in the plasma can lead to the deposition of thin layers protecting wood surfaces against water, fire, and molds …”

Section: Introductionmentioning

confidence: 99%

Influence of substrate outgassing on the plasma properties during wood treatment in He dielectric barrier discharges at atmospheric pressure

Levasseur

Gangwar

Profili

et al. 2016

Plasma Processes & Polymers

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This work analyzes the effect of wood outgassing on the properties of He dielectric barrier discharges operated in a homogenous regime. Over the 60 min wood treatment investigated, the discharge current increased by almost a factor of two due to the release of air and humidity. Based on optical emission spectroscopy and collisional-radiative modeling, these effects further yield to an increase of the electron temperature and a significant decrease of the relative number density of He metastable atoms. Experiments were also performed in presence of trace amounts of N 2 , O 2 , and dry air to simulate wood outgassing. The amount of air released from the wood sample decreased with plasma treatment time, with a two-slope first-order decay behavior.

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“…Plasma-based modification of wood surface using air as the process gas is known to improve wetting characteristics [13][14][15], which enhances the adhesion of coatings and adhesives [16][17][18][19]. Additionally, the uptake characteristics of wooden materials for water and waterbased modification agents are positively affected by plasma modification [20][21][22][23] as well as the penetration depth of adhesives applied to pre-treated wood surfaces [24]. Chen et al reported an increase in the adhesive strength of plywood made of plasma-treated poplar veneers [25].…”

Section: Introductionmentioning

confidence: 99%

Plywood made from plasma-treated veneers: melamine uptake, dimensional stability, and mechanical properties

et al. 2017

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This study investigates the dimensional stability and mechanical properties of plywood boards made of thermally modified and unmodified beech veneers that have undergone plasma pre-treatment before melamine resin impregnation. The water and melamine resin uptake and resulting weight percent gain of the veneers were investigated, whereby the air plasma pre-treated veneers showed improved liquid uptake. Five-layer plywood boards were then manufactured and tested for their dimensional stability, compressive strength, bending strength, and tensile strength. Plywood boards made of thermally modified and plasma pre-treated veneers showed a significantly improved dimensional stability, along with small influences on their mechanical properties.

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Increasing the water uptake of wood veneers through plasma treatment at atmospheric pressure

Cited by 19 publications

References 3 publications

Cold Atmospheric Pressure Plasma Comb—A Physical Approach for Pediculosis Treatment

Cold Atmospheric Pressure Plasma Comb—A Physical Approach for Pediculosis Treatment

Influence of substrate outgassing on the plasma properties during wood treatment in He dielectric barrier discharges at atmospheric pressure

Plywood made from plasma-treated veneers: melamine uptake, dimensional stability, and mechanical properties

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