A green way to simultaneously enhance the mechanical, flame retardant and anti-ultraviolet aging properties of polylactide composites by the incorporation of tannic acid derivatives

Effect of three de-icing additives: NaCl, wrapped NaCl (W-NaCl) and Layered double hydroxides (LDHs) on thermo-oxidative and ultraviolet aging properties of bitumen were investigated by thin film oven test (TFOT), pressure aging vessel (PAV) and ultraviolet (UV) radiation test. The experimental result illustrated that compared with bitumen with MF, the softening point and viscosity of bitumen with NaCl and W-NaCl increased and the ductility decreased distinctly after TFOT, PAV and UV aging, indicating that NaCl and W-NaCl accelerated the aging of bitumen. However, for bitumen with LDHs, the softening point and viscosity decreased significantly, the ductility increased after aging, which demonstrated that the anti-aging properties of bitumen were improved effectively by LDHs.

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The Effect of Surface Modifiers on Ultraviolet Aging Properties of Nano-zinc Oxide Modified Bitumen

Petroleum Science and Technology ◽

10.1080/10916466.2014.948119 ◽

2014 ◽

Vol 33 (1) ◽

pp. 72-78 ◽

Cited By ~ 24

Author(s):

H. Y. Liu ◽

H. L. Zhang ◽

P. W. Hao ◽

C. Z. Zhu

Keyword(s):

Zinc Oxide ◽

Modified Bitumen ◽

Surface Modifiers ◽

Nano Zinc Oxide ◽

Aging Properties ◽

Nano Zinc ◽

Ultraviolet Aging ◽

Effect Of Surface

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Preparation and Test of UV Resistant and Flame Retardant Cotton Fabric With Phytic Acid, Tannic Acid and Diethylenetriamine as Raw Materials

10.21203/rs.3.rs-376887/v1 ◽

2021 ◽

Author(s):

Xiang Zhou ◽

Yankun Yin ◽

Zhiyu Huang ◽

Lu Fu ◽

Shaohua Chen ◽

...

Keyword(s):

Flame Retardant ◽

Phytic Acid ◽

Cotton Fabric ◽

Tannic Acid ◽

Photoelectron Spectroscopy ◽

Raw Materials ◽

Cone Calorimetry ◽

Limiting Oxygen Index ◽

Ultraviolet Resistance ◽

Ultraviolet Protection

Abstract Although cotton fabric is widely used in various fields because of its unique advantages, it has the disadvantages of flammability and poor ultraviolet protection. By combining diethylenetriamine(DETA)、phytic acid (PA) and tannic acid(TA) on cotton fabric, a chemical reaction intumescent flame retardant cotton fabric with anti-ultraviolet and anti-flame retardant was developed. The flame retardant and ultraviolet resistance of cotton fabric were characterized by limiting oxygen index (LOI) test, vertical combustion test, cone calorimetry test and ultraviolet resistance test. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR) and other tests were used to analyze the chemical composition, surface morphology and residual carbon after combustion of the cotton fabric, and it was confirmed that the modified cotton fabric has good ultraviolet resistance and flame retardant performance. In this study, an eco-friendly cotton fabric treatment method was proposed, which made cotton fabric have anti-ultraviolet and flame retardant properties, and a new application of tannic acid and phytic acid in ultraviolet protection and flame retardant of fabric was put forward.

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Effect of Poly(acrylamide-acrylic acid) on the Fire Resistance and Anti-Aging Properties of Transparent Flame-Retardant Hydrogel Applied in Fireproof Glass

Polymers ◽

10.3390/polym13213668 ◽

2021 ◽

Vol 13 (21) ◽

pp. 3668

Author(s):

Feiyue Wang ◽

Mengtao Cai ◽

Long Yan

Keyword(s):

Acrylic Acid ◽

Flame Retardant ◽

Fire Resistance ◽

Flame Retardants ◽

Heat Insulation ◽

Accelerated Aging ◽

Light Transmittance ◽

Mass Ratio ◽

Aging Properties ◽

Poly Acrylamide

Poly(acrylamide-acrylic acid) (P(AM-co-AA)) was synthesized via the copolymerization of acrylamide and acrylic acid and well characterized by Fourier transform infrared spectroscopy. Afterward, the obtained P(AM-co-AA) was blended with flame retardants to prepare transparent flame-retardant hydrogel applied in the fireproof glass. The influence of poly(acrylamide-acrylic acid) on fire resistance and anti-aging properties of the transparent flame-retardant hydrogels were studied by assorted analysis methods. The optical transparency analysis shows that the light transmittance of the transparent flame-retardant hydrogel gradually decreases with the decreasing mass ratio of acrylamide to acrylic acid in P(AM-co-AA). Heat insulation testing shows that the heat insulation performance of fireproof glass applying the transparent flame-retardant hydrogel firstly decreases and then increases with decreasing mass ratio of acrylamide to acrylic acid in P(AM-co-AA). When the mass ratio of acrylamide to acrylic acid is 1:2, the obtained P(AM-co-AA) endows the resulting flame-retardant hydrogel applied in fireproof glass with the lowest light transmittance of 81.3% and lowest backside temperature of 131.4 °C at 60 min among the samples, which is attributed to the formation of a more dense and expanded char to prevent the heat transfer during combustion, as supported by the digital photos of char residues. The results of TG analysis indicate that P(AM-co-AA) imparts high thermal stability to the resulting hydrogels due to the hydrogen bonds between carboxyl and amide groups. The accelerated aging test shows that the transparent flame-retardant hydrogel containing P(AM-co-AA) is less affected by aging conditions. Especially, when the mass ratio of acrylamide to acrylic acid in P(AM-co-AA) is 4:1, the resulting transparent flame-retardant hydrogel shows a light transmittance of 82.9% and backside temperature of 173.1 °C at 60 min after 7 aging cycles, exhibiting the best comprehensive properties among the samples.

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