Fire Retardancy of Fiber Reinforced Polymer Composites Coated with POSS/Clay/MWCNTs Hybrid Buckypaper

doi:10.3724/SP.J.1077.2014.13500

Abstract

Abstract:

A hybrid buckypaper consisting of multi-walled carbon nanotubes (MWCNTs), clay and polyhedral oligomeric silsesquioxane(POSS) was fabricated through vacuum filtration method. The as-prepared buckypaper (or hybrid buckypaper) can be incorporated onto the surface of fiber reinforced polymer composite as surface fire shields. The morphology and pore size distribution of the MWCNTs buckypaper were characterized with field emission scanning electron microscope (FESEM) and Barret-Joyner-Halenda(BJH) method. The fire retardant performance of composite laminates coated with (or without) the buckypaper was thoroughly evaluated by cone calorimeter testing at a radiant heat flux of 50 kW/m². Compared with the contral composite, the peak heat release rate (PHRR) of composite surface coated MWCNTs buckypaper or the hybrid buckypaper reduced more than 20.2% and 35%, respectively. The CO production rate and the smoke production rate reduced obviously. The formation of compact char material can be observed on the surface of the composite residues and analyzed by FESEM, the fire retardant property of composite can be improved by surface coated hybrid buckypaper.

Key words: buckypaper, POSS, clay, cone calorimeter, fire retardancy

CLC Number:

TB33
TB34

LU Shao-Wei, ZENG Xian-Jun, ZHANG Chun-Xu, WANG Ji-Jie, NIE Peng. Fire Retardancy of Fiber Reinforced Polymer Composites Coated with POSS/Clay/MWCNTs Hybrid Buckypaper[J]. Journal of Inorganic Materials, 2014, 29(6): 589-593.

Figures/Tables 9

Fig. 1 Photographs of buckpaper and hybrid buckypaper (a) Buckpaper; (b) Hybrid buckypaper; (c) Composite surface coated buckypaper; (d) Composite surface coated hybrid buckypaper

Fig. 2 FESEM images of buckypaper (a) and hybrid buckypaper (b) co-cured with composite

Table 1 Composition of composites

Samples	Contents/wt%
Samples	GF	Resin	Buckypaper
Control	60	40	0
GF/BP	57.2	39.7	2.1
GF/BP/POSS+Clay	53.8	40.0	2.2

Fig. 3 Distribution of pore size diameter for buckypaper

Fig. 4 Comparison of heat release rate curves (A) and effective heat of combustion curve (B) for composite sample

Table 2 Cone calorimetric data for laminate composite samples.

Sample	TTI/s	Peak HRR<br/>/(kW•m^-2)	Time to peak HRR/s	Total heat release /(kW•m^-2)	Average HRR<br/>/(kW•m^-2)	Total smoke release<br/>/(m²•m^-2)	Peak CO production rate<br/>/(kg•kg^-1)	Average EHC<br/>/(MJ•kg^-1)
Control	52	113.2	85	11.1	38.6	254.4	15.7	19.0
CF/BP	60	90.3	90	10.1	33.9	244.7	8.6	18.4
CF/BP/Clay+POSS	62	73.6	110	7.3	25.3	229.9	0.74	17.4

Fig. 5 Comparison of CO production rate (A) and smoke production rate cures (B) for composite samples

Fig. 6 FESEM images of buckypaper (a) and hybrid buckypaper (b) before zone test

Fig. 7 FESEM images and optical pictures (Insets) of char materials of composites surface coated with buckypaper (a) and hybrid buckypaper (b) after cone test

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