Initial study of micronized zinc borate as flame retardant in Eucalyptus grandis from Uruguay

MRS Advances ◽  
2018 ◽  
Vol 3 (61) ◽  
pp. 3551-3556 ◽  
Author(s):  
Álvaro Camargo ◽  
Claudia M Ibañez
Keyword(s):  
Flame Retardant ◽  
Flame Spread ◽  
Eucalyptus Grandis ◽  
Initial Study ◽  
Wood Products ◽  
Zinc Borate ◽  
Fire Exposure ◽  
Percentage Decrease ◽  
Remarkable Improvement ◽  
Flame Retardant Properties

ABSTRACTZinc borate has long been used as a protector for wood products due to its fungicide, insecticide and flame retardant properties. In this initial study, its capacity as a flame retardant when applied to Eucalyptus grandis wood is evaluated; micronized zinc borate, synthesized from zinc oxide and boric acid in our laboratory was used. The methodology used in the study is the use of the Vandersall tunnel, which allowed analyzing parameters such as the flame spread, the carbonization index, the carbonization area and the wood weight loss. The results show a remarkable improvement in these parameters after the application of micronized zinc borate. For the longest fire exposure time, the percentage decrease of each evaluated parameter is, for tangential and radial plane respectively: 31.27-43.00% for flame spread, 36.66-40.86% for carbonization area, 33.01-52.49% for carbonization index and 19.86-57.80% for mass loss.

scholarly journals Flame Retardant Properties of a Guanidine Phosphate–Zinc Borate Composite Flame Retardant on Wood

ACS Omega ◽  
2021 ◽  
Author(s):  
Linyuan Wang ◽  
Yabing Yang ◽  
Hongbo Deng ◽  
Wenyi Duan ◽  
Jiajie Zhu ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Zinc Borate ◽  
Flame Retardant Properties ◽  
Guanidine Phosphate

Controllable synthesis and flame-retardant properties of spherical zinc borate nanostructure

2012 ◽  
Vol 7 (8) ◽  
pp. 863 ◽  
Author(s):  
Pingqiang Gao ◽  
Wenhua Song ◽  
Feng Ding ◽  
Xin Wang ◽  
Mengmeng Li
Keyword(s):  
Flame Retardant ◽  
Zinc Borate ◽  
Controllable Synthesis ◽  
Flame Retardant Properties

scholarly journals Hybrid Silica-Phytic Acid Coatings: Effect on the Thermal Stability and Flame Retardancy of Cotton

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1664 ◽  
Author(s):  
Marco Barbalini ◽  
Luca Bertolla ◽  
Jaromír Toušek ◽  
Giulio Malucelli
Keyword(s):  
Heat Release ◽  
Flame Retardant ◽  
Phytic Acid ◽  
Flame Spread ◽  
Sol Gel ◽  
Weight Ratio ◽  
Hybrid Coatings ◽  
Flame Retardant Properties ◽  
Coated Fabrics ◽  
Combustion Tests

New hybrid sol–gel coatings based on tetraethoxysilane (TEOS) and phytic acid (PA) were designed and applied to cotton; the flame-retardant properties of the treated fabrics were thoroughly investigated by means of flame-spread and forced-combustion tests. The first goal was to identify the TEOS:PA weight ratio that allowed the achievement of the best flame-retardant properties, with the lowest final dry add-on on the fabrics. Therefore, different TEOS:PA sols were prepared and applied to cotton, and the resulting coated fabrics were thoroughly investigated. In particular, solid-state NMR spectroscopy was exploited for assessing the condensation degree during the sol–gel process, even for evaluating the occurrence of possible reactions between phytic acid and the cellulosic substrate or the alkoxy precursor. It was found that a total dry add-on of 16 wt % together with 70:30 TEOS:PA weight ratio provided cotton with self-extinction, as clearly indicated by flame-spread tests. This formulation was further investigated in forced-combustion tests: a significant reduction of heat release rate (HRR), of the peak of HRR, and of total heat release (THR) was found, together with a remarkable increase of the residues after the test. Unfortunately, the treated fabrics were not resistant to washing cycles, as they significantly lost their flame-retardant properties, consequently to the partial removal of the deposited hybrid coatings.

Study on Formula of New Type Flame Retardant Polyethylene

2013 ◽  
Vol 652-654 ◽  
pp. 406-409
Author(s):  
Feng Tian ◽  
Yan Rong Ni ◽  
Chao Hua Su
Keyword(s):  
Flame Retardant ◽  
Aluminum Hydroxide ◽  
Magnesium Carbonate ◽  
Zinc Borate ◽  
Good Effect ◽  
Barrier Effect ◽  
Promoting Effect ◽  
Insulating Materials ◽  
New Type ◽  
Flame Retardant Properties

The Formula of flame retardant material for PE insulated cable was developed. It mainly included 42 phrs LDPE,18 phrs EVA,7phr Magnesium carbonate,32phr Aluminum hydroxide,6phr silica,6phr Zinc borate and 5phr Silicone. The mixture was extruded through mixing and samples were made. Relative experiment showed that silicone had good effect on improvement of flame retardant properties of insulating materials. Zinc borate had promoting effect of the flame retardant. Silica had barrier effect. When parts of PE was substituted by EVA, the mechanical and flame retardant properties of the materials increased.

scholarly journals Effects of Size of Zinc Borate on the Flame Retardant Properties of Intumescent Coatings

2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
Ning Lu ◽  
Pengchao Zhang ◽  
Ya’nan Wu ◽  
Danqing Zhu ◽  
Zhu Pan
Keyword(s):  
Flame Retardant ◽  
Weak Interaction ◽  
Energy Dispersive Spectrometry ◽  
Smoke Suppression ◽  
Zinc Borate ◽  
Char Residue ◽  
Char Formation ◽  
Cone Calorimeter Test ◽  
Flame Retardant Properties ◽  
Thermal Stability Of

This paper is aimed at assessing the fire retardancy and thermal stability of intumescent flame retardant (IFR) containing ammonium polyphosphate (APP), pentaerythritol (PER), and melamine (MEL). Zinc borate (ZB) was added at the loading of 2%, 4%, 6%, 8%, 10%, and 12% by weight of IFR. The sizes of investigated ZB fall in 3 ranges: 1-2 μm, 2-5 μm, and 5-10 μm. The performance of APP/PER/MEL was investigated by using thermogravimetry analysis (TGA), cone calorimeter test, Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscopy, and energy-dispersive spectrometry. The results obtained from the above experiments show that the incorporation of ZB can improve the fire protection performance. A 77% decrease in total smoke production and 84.6% decrease in total heat release were achieved for the addition of 2 wt% ZB (2-5 μm) in the IFR coating. TGA results indicate an increased amount of char residue. Compared to the control IFR coating, the char residue of IFR containing 2 wt% ZB (2-5 μm) has increased approximately 1.5-fold, 10-fold, and 25-fold, at 600°C, 700°C, and 800°C, respectively. The effective char formation results in excellent smoke suppression. Regarding smoke suppression performance, the order for smoke density is IFR/ZB (2-5 μm) < IFR/ZB (5-10 μm) < IFR/ZB (1-2 μm), regardless of investigated loading levels. The decline of smoke suppression performance for IFR/ZB (5-10 μm) and IFR/ZB (1-2 μm) is believed to be due to the poor char formation, as a result of a weak interaction of APP, PER, MEL, and ZB. This weak interaction is caused by the decrease in the specific surface area and agglomeration of ZB particles for IFR/ZB (5-10 μm) and IFR/ZB (1-2 μm), respectively.

scholarly journals Investigations of Flame Retardant Properties of Zinc Borate Accompanying with Huntite and Hydromagnesite in Polymer Composites

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Hüsnügül YILMAZ ATAY ◽  
Öykü İÇİN ◽  
Buket KURU
Keyword(s):  
Flame Retardant ◽  
Synergistic Effects ◽  
Polymeric Materials ◽  
Polymer Materials ◽  
Morphological Properties ◽  
Zinc Borate ◽  
Human Beings ◽  
Polypropylene Composites ◽  
Twin Screw ◽  
Flame Retardant Properties

Fires have been a danger to human beings for the centuries. As people lost their lives and property in fires, they tried to fight the fire and their efforts in this area continued increasingly. Unfortunately, it is still not possible to completely reset the risk of starting the fire. But it seems likely to extinguish immediately after the fire has started, and this is very important to save people’s lives. Scientists have been working in this field in recent years; they are concentrated on producing fire-resistant materials using different materials. This can be provided by different ways; either fire-resistant material can be produced new, or the fire resistivity can be provided by incorporating the additive material into a flammable material. In our previous studies, we used huntite and hydromagnesite minerals to give fire resistance property to polymer materials, very successful results were obtained. In this study, huntite and hydromagnesite minerals were used for accompanying with zinc borate in polypropylene composites in order to increase the flame retardant property of a polymeric materials. Different content of minerals were blended with polypropylene, and composites were produced by twin-screw extruder for observing synergistic effect. Scanning electron microscopy (SEM) analyses were conducted to determine the structural and morphological properties of the composites. Thermal properties were determined according to thermogravimetric analysis (TGA). Tensile and three point bending tests were carried out to obtain mechanical properties. Flame retardant performance was evaluated according to UL 94 vertically flammability test. It was concluded that very good synergistic effects were obtained that zinc borate was significantly influential with huntite/hydromagnesite in the flammability characteristics of composites because higher char formation is observed with zinc borate addtion. Moreover, the zinc borate reduced the smoke generated during combustion.

Synthesis of hydrophobic zinc borate nanoflakes and its effect on flame retardant properties of polyethylene

2010 ◽  
Vol 183 (4) ◽  
pp. 957-962 ◽  
Author(s):  
Shengli Li ◽  
Beihong Long ◽  
Zichen Wang ◽  
Yumei Tian ◽  
Yunhui Zheng ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Zinc Borate ◽  
Flame Retardant Properties

Flame Retardant Properties of Fiber-Based Decorative Wallboard

2012 ◽  
Vol 487 ◽  
pp. 739-747
Author(s):  
Zuo Dong Qin ◽  
G.J. Duns ◽  
Zhang Lin ◽  
Ji Shuang Chen
Keyword(s):  
Flame Retardant ◽  
Three Dimensional ◽  
Raw Material ◽  
Zinc Borate ◽  
Relative Mass ◽  
Mixed System ◽  
Flame Resistance ◽  
Bamboo Pulp ◽  
A Value ◽  
Flame Retardant Properties

In this study, bamboo pulp is utilized as the main raw material for the production of compression-molded, fiber-based decorative wallboard panels which have three-dimensional geometric structure and possess environmentally compatible “green” flame retardant properties. The effectiveness of several flame retarding agents, including the Al(OH)3 single component system, the Al(OH)3/Mg(OH)2 mixed system and the Al(OH)3/Mg(OH)2/Zinc Borate mixed system are examined in terms of the resulting flame resistance, physical properties and oxygen indexes of the fiber-based decorative wallboard. The results show that the Al(OH)3/Mg(OH)2/Zinc Borate multicomponent mixed system is the most ideal flame retardant system for such applications. Results indicate that the optimal formulation consist of: 30% Mg(OH)2/25% Al(OH)2 /15% Zinc borate (relative mass ratio). Under such conditions, the oxygen index of the fiber decorates wallboard is 34.4, and the level of formaldehyde release reaches a value of E0.

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