Surface modification of fire-retardant asphalt with silane coupling agent

Abstract

The theory and approach of the surface modified of asphalt fire-retardant with silane coupling agent were introduced. The optimum silane dosage was determined, and the structure and properties of the asphalt fire-retardant before and after the surface modification were characterized by infrared spectrum and thermo gravimetric analysis. The dispersion effect of asphalt fire-retardant was studied. The influence of the surface modification on the hydrophilicity and lipophilicity of the asphalt fire-retardant was analyzed. The experimental results showed that there were physical and chemical interactions between the silane coupling agent and the asphalt fire-retardant, which reduced the surface polarity of the asphalt fire retardant. The optimum silane coupling agent dosage was 0.95% of the asphalt fire retardant. The surface modification improved the thermal stability, dispersibility and lipophilicity of the asphalt fire retardant, which enhanced the compatibility between asphalt fire retardant and asphalt.

Keywords

silane / asphalt fire-retardant / coupling agent / surface modification

References

[1] Chen Huiqiang, Hao Peiwen. Development of the Modified Fireretardant Asphalt and Performance Evaluation on Its Mixture[J]. Journal of Wuhan University of Technology, 2008, (12): 58–62

[2] Weber M. Mineral Flame Retardants—Vverview and Future Trends[J]. Ind. Miner., 2000, (2):19–28

[3] Lu ShuiYu, Hamerton Ian. Recent Development in the Chemistry of Halogen Free Flame Retardant Polymers[J]. Progress in Polymer Science, 2002, (8): 1 661–1 712

[4] Du Gaoxiang, Zheng Shuilin. Surface Modification of Ulra-fine Brucite Powder by Silane Coupling Agent[J]. Journal of the Chinese Ceramic Society, 2005, (5): 659–664

[5] Liao Jianguo Wang Xuejiang. Surface Modification of Nano-Hydroxyapatite with Silane Agent[J]. Journal of Inorganic Materials, 2008, (1): 29–33

[6] Xu Hui, Sun Tao. Surface Modification of Nanosized TiO₂ with Silane Coupling Agent[J]. Paint & Coatings Industry, 2008, (4): 2–5

[7] Vadala M. L. Block Copolysiloxanes and Their Complexation with Cobalt Nanoparticles[J]. Polymer, 2004, 45(22): 7 449-7 461.

[8] Gao Hongyun, Zhang Zhaogui. The Linking Mechanism and Research Situation of Silane Couplign Agent[J]. Jiangxi Chemical Industry, 2003, (2): 30–34

[9] Zhao Zhen, Zhang Wenlong. Applications and Research Progresses of Coupling Agents[J]. Plastics Additives, 2007, (3): 4–10

[10] Qin Kunhua, Ma Wenshi. Preparation and Characterization of Nanoized Fe₃O₄ Magnetic Particles Modified by Silane[J]. Silicone Material, 2008, (2): 11–15

[11] Lu Yinping, Liu Qinfu. Surface Modification of Nanokaolin by Silane coupling agent[J]. Non-Metallic Mines, 2008, (5): 6–10

[12] Liliane B., Paul C. J. Reinforcement of Natural Rubber Use of in Situgenerated Silicas and Nanofibres of Sepiolite [J]. Polymer, 2005, 46(12): 4 144-4 151.

[13] Zhou Yamin. The Surface Modifaction of TiO₂ by Silane coupling agent[J]. Journal of Dongguan University of Technology, 2008, (5): 21–24

[14] Xu Qing, Zhang Shenjing. Chemical Modification of Attapulgite with Silane Coupling Agent[J]. Petrochemical Technology & Application, 2008, (6): 523–525

[15] Liao S. K., Jang S. C., Lin M. F. Phase Behavior and Mechanical Properties of Siloxane-Urethane Copolymer[J]. Journal of Polymer Research, 2005, 12(2): 103-112.

[16] Felix N. N., John C. B. Adhesion Promotion of Poly(pheny-lene Sulfide) to Aluminum Treated with Silane Coupling Agents[J]. Journal of Adhesion Sci. Technol., 2006, 20(2): 197-208.