Chemical mechanism of fire retardance of boric acid on wood

Wang, Qingwen; Li, Jian; Winandy, Jerrold E.

doi:10.1007/s00226-004-0246-4

Cited by 157 publications

(112 citation statements)

References 6 publications

Supporting

Mentioning

100

Contrasting

Unclassified

Order By: Relevance

“…This indicates that the static MOEs decreased, irrespective of the species. This observation was consistent with previous literature (Kunze et al 2002;Wang et al 2004;Wang et al 2005; Zhang and Chen 2011) and can be attributed to the fire-retardant chemical treatment. Meanwhile, the DMOE was decreased by the treatment slightly (0.06% and 0.97%), and the hardness was decreased (21.2% and 19.8%) for spruce and larch, respectively.…”

Section: Analysis Of Physical and Mechanical Propertiessupporting

confidence: 93%

“…Although a wood treatment with such chemicals effectively retards combustion, it also may affect the physical and mechanical properties of wood. Many researchers have recognized that a fire-retardant treatment and post re-drying can reduce the initial strength properties of wood (Kunze et al 2002;Wang et al 2004Wang et al , 2005Zhang and Chen 2011). Moreover, it has been reported that a pressure treatment caused a decrease of 8% to 10% in the bending strength of different wood types (Islam et al 2007).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Changes in Some Mechanical and Physical Properties and Anatomical Structure of Spruce and Larch Wood after Fire-Retardant Treatment

et al. 2017

View full text Add to dashboard Cite

Changes in the physical and mechanical properties and anatomical structures of spruce (Picea) and larch (Larix) specimens before and after fire-retardant impregnation were studied. Results indicated that the static modulus of elasticity (MOE), dynamic modulus of elasticity (DMOE), and the Brinell hardness of the specimens decreased for both wood species upon post-treatment. This could be accounted for by the degradation of hemicelluloses by the phosphorus-based compound, the minute cracks in the latewood cell wall, and the enlarged width of the cell lumen of the specimen resulting from the vacuum-pressure treatment. However, the decreased ratio of the MOR and DMOE to density contributed to lower sound transmission, which is expected to be important in a housing environment.

show abstract

Section: Analysis Of Physical and Mechanical Propertiessupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Changes in Some Mechanical and Physical Properties and Anatomical Structure of Spruce and Larch Wood after Fire-Retardant Treatment

et al. 2017

View full text Add to dashboard Cite

show abstract

“…DMDAP led to a decrease in CO 2 concentration. This is not a large difference but this may be result in growth dehydration and charring in the presence of DMDAP (35) . DEDAP and DBDAP exhibited a slightly higher CO 2 concentration than DMDAP, confirming the combustibility of DEDAP and DBDAP in wood.…”

Section: Toxic Gases Productionmentioning

confidence: 98%

Evaluation of Combustion Gas for Carbon Oxide of Wood Coated with Bis-(dialkylaminoalkyl) Phosphinic Acids Additives

Jin¹,

Chung²

2016

Fire Science and Engineering

View full text Add to dashboard Cite

요 약 이 연구는 비스-(디메틸아미노메틸) 포스핀산(DMDAP), 비스-(디에틸아미노메틸) 포스핀산(DEDAP) 과 비스-(디부틸 아미노메틸) ABSTRACTThis study examined the generation of combustion toxic gases of pinus rigida specimens processed with bis-(dimethylaminomethyl) phosphinic acid (DMDAP), bis-(diethylaminomethyl) phosphinic acid (DEDAP), and bis-(dibutylaminomethyl) phosphinic acid (DBDAP). Each pinus rigida plate was coated three times with 15 wt.% flame retardants in an aqueous solution. The specimens were then dried at room temperature. The production of combustion toxic gases was investigated using a cone calorimeter (ISO 5660-1). The first time to peak mass loss rate (1 ) for the processed specimens was decreased 1.8% for DMDAP and 5.3% for DBDAP and increased 1.8% for DEDAP. The peak carbon monoxide (CO p e a k ) production was 1.5 to 2.0 times higher than that of the unprocessed plate. The peak carbon dioxide (CO 2 p e a k ) production was reduced 0.01 times for DMDAP and increased 1.15 to 1.19 times for DEDAP and DBDAP compared with the unprocessed specimens. In particular, the oxygen concentration was much higher than 15%, which can be fatal to humans and the resulting hazard can be eliminated. Overall, the combustion toxicity of flammable gas were increased partially by the chemical additives compared with those of the unprocessed plate.

show abstract

“…목재의 열분해로 생성 된 자유 라디칼숯을 생성하는 폴리머화 및 열분해 생성 물의 방향족화를 수행한다. 또한 BA는 숯 수율을 증가시켜 산소를 제거하기 위한 탈수 반응을 촉진시킬 수 있다 (26) . 생 성된 산화붕소는 숯생성 상의 활성화 에너지를 감소시켜 숯 생성이 많아지므로 숯의 무염연소를 지연시킬 수 있다.…”

Section: 함수율 측정unclassified

Fire Risk of Wood Treated With Boron Compounds by Combustion Test

Jin¹,

Chung²

2018

Fire Sci Eng

View full text Add to dashboard Cite

Experiments on the combustion characteristics of untreated wood specimens and also treated ones with boric acid and ammonium pentaborate were carried out using a cone calorimeter according to ISO 5660-1 standard. As a result, comparing to untreated specimen, the fire performance index (FPI) of the specimens treated with boron compounds increased by 1.2 to 2.1 times and the fire growth index (FGI) increased by 1.6 to 8.4%. Also, total smoke release rate (TSR) was 9.0 to 28.3% lower than that of the untreated specimen. It is understood that the test specimens treated with the boron compound produces a carbonized layer with a flame retarding effect. The highest CO concentration, 0.01112%, for the untreated specimen was observed at 418 s, but the specimens treated with boron compound decreased 13.2 to 37.5% compared to untreated specimen. Therefore, wood treated with boron compounds is expected to have lower fire hazards and risks.

show abstract

Chemical mechanism of fire retardance of boric acid on wood

Cited by 157 publications

References 6 publications

Changes in Some Mechanical and Physical Properties and Anatomical Structure of Spruce and Larch Wood after Fire-Retardant Treatment

Changes in Some Mechanical and Physical Properties and Anatomical Structure of Spruce and Larch Wood after Fire-Retardant Treatment

Evaluation of Combustion Gas for Carbon Oxide of Wood Coated with Bis-(dialkylaminoalkyl) Phosphinic Acids Additives

Fire Risk of Wood Treated With Boron Compounds by Combustion Test

Contact Info

Product

Resources

About