Polydopamine modified ammonium polyphosphate modified shape memory water‐borne epoxy composites with photo‐responsive flame retardant property

2020 ◽  
Vol 138 (3) ◽  
pp. 49696
Author(s):  
Shanwen Zhu ◽  
Wenjun Wang ◽  
Zahidul Islam ◽  
Yaqin Fu ◽  
Yubing Dong
Keyword(s):  
Shape Memory ◽  
Flame Retardant ◽  
Ammonium Polyphosphate ◽  
Epoxy Composites ◽  
Flame Retardant Property ◽  
Water Borne

scholarly journals Ammonium Polyphosphate Intercalated Layered Double Hydroxide and Zinc Borate as Highly Efficient Flame Retardant Nanofillers for Polypropylene

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1114 ◽  
Author(s):  
Yanshan Gao ◽  
Qiang Wang ◽  
Weiran Lin
Keyword(s):  
Flame Retardant ◽  
Ammonium Polyphosphate ◽  
Zinc Borate ◽  
Polypropylene Composites ◽  
Flame Retardant Property ◽  
Thermogravimetric Analyzer ◽  
Mixing Method ◽  
And Performance ◽  
Double Hydroxide ◽  
Double Hydroxides

We found in our previous study that layered double hydroxides (LDHs) which undergo aqueous miscible organic solvent treatment (AMOST) can tune the hydrophobicity surface of LDHs to be hydrophobic, and then the solvent mixing method can be used to prepare polymer/LDH nanocomposites. However, flame retardant property is not very high if LDHs are only used. In this present work, ammonium polyphosphate (APP) intercalated LDHs and zinc borate (ZB) was incorporated into a polypropylene (PP) matrix using the solvent mixing method. The structures, morphologies, and performance of the composites were characterized carefully. The peak heat release rate (PHRR) reduction of PP containing 10 and 20 wt % APP-LDH reached 27% and 55%, respectively, which increased up to 63% compared with PP/CO3-LDH. After incorporating 2 wt % ZB in the PP/APP-LDH system, the flame retardant property was further improved. Polypropylene composites with 20 wt % APP-LDH and 2 wt % ZB showed a 58% PHRR reduction. In addition, thermogravimetric analyzer (TGA) results indicated that the addition of APP-LDH and ZB improved the temperature at 50% weight loss (T50%) and the char formation of the materials significantly.

scholarly journals The Effect of Soluble Ammonium Polyphosphate on the Properties of Water Blown Semirigid Polyurethane Foams

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Weiguo Yao ◽  
Hanmo Wang ◽  
Dongbo Guan ◽  
Tao Fu ◽  
Tianqi Zhang ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Fourier Transform ◽  
Flame Retardant ◽  
Oxygen Index ◽  
Degradation Mechanism ◽  
Polyurethane Foams ◽  
Ammonium Polyphosphate ◽  
Limiting Oxygen Index ◽  
Flame Retardant Property ◽  
Blowing Agent

Soluble ammonium polyphosphate (SAPP) is employed to prepare flame retardant semirigid polyurethane foam (SPUF) using water as blowing agent. The flame retardant property of SPUF is evaluated by limiting oxygen index (LOI) and horizontal burning test. Also the thermal degradation mechanism is studied by TG and Fourier transform infrared (FTIR). The results show that, with the increase of the content of SAPP, flame retardant property of SPUF improves obviously as the LOI value increases and the horizontal burning rate decreases. And residual char is increased up to 20% with 19 wt% SAPP. Moreover, the mechanical property of SPUF is enhanced dramatically.

scholarly journals Highly transparent and flame-retardant epoxy composites based on a hybrid multi-element containing POSS derivative

RSC Advances ◽  
2017 ◽  
Vol 7 (73) ◽  
pp. 46139-46147 ◽  
Author(s):  
Cheng Liu ◽  
Ting Chen ◽  
Conghui Yuan ◽  
Ying Chang ◽  
Guorong Chen ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Flame Retardant ◽  
Epoxy Resin ◽  
Epoxy Composites ◽  
High Transparency ◽  
Flame Retardant Property

Epoxy resin modified with ODMAS comprising a POSS core and sixteen DOPO groups possess high transparency, excellent flame retardant property and enhanced mechanical strength.

scholarly journals An Intelligent Fire-Protection Coating Based on Ammonium Polyphosphate/Epoxy Composites and Laser-Induced Graphene

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 984
Author(s):  
Weiwei Yang ◽  
Ying Liu ◽  
Jie Wei ◽  
Xueli Li ◽  
Nianhua Li ◽  
...  
Keyword(s):  
Shape Memory ◽  
Flame Retardant ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Fire Protection ◽  
Temperature Sensor ◽  
Ammonium Polyphosphate ◽  
Photothermal Effect ◽  
Laser Scribing ◽  
Protection Coating

Fire-protection coatings with a self-monitoring ability play a critical role in safety and security. An intelligent fire-protection coating can protect humans from personal and property damage. In this work, we report the fabrication of a low-cost and facile intelligent fire coating based on a composite of ammonium polyphosphate and epoxy (APP/EP). The composite was processed using laser scribing, which led to a laser-induced graphene (LIG) layer on the APP/EP surface via a photothermal effect. The C–O, C=O, P–O, and N−C bonds in the flame-retardant APP/EP composite were broken during the laser scribing, while the remaining carbon atoms recombined to generate the graphene layer. A proof-of-concept was achieved by demonstrating the use of LIG in supercapacitors, as a temperature sensor, and as a hazard detection device based on the shape memory effect of the APP/EP composite. The intelligent flame protection coating had a high flame retardancy, which increased the time to ignition (TTI) from 21 s to 57 s, and the limiting oxygen index (LOI) value increased to 37%. The total amount of heat and smoke released during combustion was effectively suppressed by ≈ 71.1% and ≈ 74.1%, respectively. The maximum mass-specific supercapacitance could reach 245.6 F·g−1. The additional LIG layer enables applications of the device as a LIG-APP/EP temperature sensor and allows for monitoring of the deformation according to its shape memory effect. The direct laser scribing of graphene from APP/EP in an air atmosphere provides a convenient and practical approach for the fabrication of flame-retardant electronics.

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