Flame-retardant polyvinyl alcohol/cellulose nanofibers hybrid carbon aerogel by freeze drying with ultra-low phosphorus
(2019) In Applied Surface Science 497.- Abstract
Polyvinyl alcohol/cellulose nanofibers hybrid aerogel was prepared under freeze drying method. To improve the aerogels' anti-combustion performance, 0.8 wt% microencapsulated ammonium polyphosphate (MCAPP) was loaded as the flame retardant. Aerogels with extremely low density (~0.06 g/cm3) and excellent mechanical performance (Young's modulus: 1.045 MPa) can be obtained. The resulted aerogel also exhibit considerable thermal insulation ability (thermal conductivity: ~0.04 W/m·K). Experimental results indicate that the value of limiting oxygen index increases from 19.5% to 37.5% when loading 0.8 wt% MCAPP. Accordingly, the aerogels' peak heat release rate decreased significantly from 222.44 to 107.84 kW/m2. The char... (More)
Polyvinyl alcohol/cellulose nanofibers hybrid aerogel was prepared under freeze drying method. To improve the aerogels' anti-combustion performance, 0.8 wt% microencapsulated ammonium polyphosphate (MCAPP) was loaded as the flame retardant. Aerogels with extremely low density (~0.06 g/cm3) and excellent mechanical performance (Young's modulus: 1.045 MPa) can be obtained. The resulted aerogel also exhibit considerable thermal insulation ability (thermal conductivity: ~0.04 W/m·K). Experimental results indicate that the value of limiting oxygen index increases from 19.5% to 37.5% when loading 0.8 wt% MCAPP. Accordingly, the aerogels' peak heat release rate decreased significantly from 222.44 to 107.84 kW/m2. The char residue rises when introducing MCAPP and the char's integrity improves a lot after combustion. The fire performance index and fire growth index increases and falls respectively, indicating improved anti-combustion performance. X-ray photoelectron spectroscopy results show C[dbnd]O bonds would be increased for the esterification of phosphoric acid from MCAPP. In addition, the production of carbonate can be prohibited while combustion when loading MCAPP.
(Less)
- author
- Huang, Yajun LU ; Zhou, Ting ; He, Song ; Xiao, Huan ; Dai, Huaming ; Yuan, Bihe ; Chen, Xianfeng and Yang, Xiaobing
- organization
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Aerogel, Cellulose nanofibers, Flame retardant, Polyvinyl alcohol
- in
- Applied Surface Science
- volume
- 497
- article number
- 143775
- publisher
- Elsevier
- external identifiers
-
- scopus:85071728608
- ISSN
- 0169-4332
- DOI
- 10.1016/j.apsusc.2019.143775
- language
- English
- LU publication?
- yes
- id
- f17ac809-0631-46cf-b4cb-57c9ec2d4821
- date added to LUP
- 2019-09-16 08:49:11
- date last changed
- 2022-04-26 05:17:01
@article{f17ac809-0631-46cf-b4cb-57c9ec2d4821, abstract = {{<p>Polyvinyl alcohol/cellulose nanofibers hybrid aerogel was prepared under freeze drying method. To improve the aerogels' anti-combustion performance, 0.8 wt% microencapsulated ammonium polyphosphate (MCAPP) was loaded as the flame retardant. Aerogels with extremely low density (~0.06 g/cm<sup>3</sup>) and excellent mechanical performance (Young's modulus: 1.045 MPa) can be obtained. The resulted aerogel also exhibit considerable thermal insulation ability (thermal conductivity: ~0.04 W/m·K). Experimental results indicate that the value of limiting oxygen index increases from 19.5% to 37.5% when loading 0.8 wt% MCAPP. Accordingly, the aerogels' peak heat release rate decreased significantly from 222.44 to 107.84 kW/m<sup>2</sup>. The char residue rises when introducing MCAPP and the char's integrity improves a lot after combustion. The fire performance index and fire growth index increases and falls respectively, indicating improved anti-combustion performance. X-ray photoelectron spectroscopy results show C[dbnd]O bonds would be increased for the esterification of phosphoric acid from MCAPP. In addition, the production of carbonate can be prohibited while combustion when loading MCAPP.</p>}}, author = {{Huang, Yajun and Zhou, Ting and He, Song and Xiao, Huan and Dai, Huaming and Yuan, Bihe and Chen, Xianfeng and Yang, Xiaobing}}, issn = {{0169-4332}}, keywords = {{Aerogel; Cellulose nanofibers; Flame retardant; Polyvinyl alcohol}}, language = {{eng}}, publisher = {{Elsevier}}, series = {{Applied Surface Science}}, title = {{Flame-retardant polyvinyl alcohol/cellulose nanofibers hybrid carbon aerogel by freeze drying with ultra-low phosphorus}}, url = {{http://dx.doi.org/10.1016/j.apsusc.2019.143775}}, doi = {{10.1016/j.apsusc.2019.143775}}, volume = {{497}}, year = {{2019}}, }