Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (01): 1-8.doi: 10.13475/j.fzxb.20210907508

• Fiber Materials •     Next Articles

Preparation and study of pure biomass cellulose aerogels for flame retardancy

LUO Xiaolei1, LIU Lin2, YAO Juming2,3()   

  1. 1. College of Textile Science and Engineering(International Institute of Silk), Zhejiang Sci-Tech University,Hangzhou, Zhejiang 310018, China
    2. School of Materials Science & Engineering, Zhejiang Sci-Tech University,Hangzhou, Zhejiang 310018, China
    3. School of Materials Science and Chemical Engineering, Ningbo University,Ningbo, Zhejiang 315211, China
  • Received:2021-09-23 Revised:2021-11-03 Online:2022-01-15 Published:2022-01-28
  • Contact: YAO Juming E-mail:yaoj@zstu.edu.cn

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Abstract:

In order to recycle textiles and enhance the green and low-carbon circular development, regenerated cellulose aerogels were prepared from waste cotton yarns, and the biomass tea polyphenol extracted from agricultural and forestry waste was deposited on the aerogel surface under the driving of water environment. The flame retardant cellulose aerogel (BTCA) was developed for pure biomass energy saving and heat preservation. The flame retardancy, thermal stability, thermal decomposition vapor and solid products, and flame retardant mechanism of BTCA were studied and analyzed by limiting oxygen index method, thermogravimetric analysis, thermogravimetric infrared spectroscopy and Raman spectroscopy. Because the biomass tea polyphenol deposits have an excellent antioxidant capacity, it can promote the dehydration and carbonization of cellulose molecular chain at the same time. Based on this, solid-phase flame retardant was achieved, and their thermal stability has been significantly improved. The limit oxygen index was as high as 32.7% and the cellulose aerogel could self-extinguish when leaving the flame.

Key words: waste cotton textiles, total biomass flame retardance, cellulose aerogel, tea polyphenol, flame retardancy

CLC Number: 

  • TS195

Fig.1

Microstructure structure of CA (a)and BTCA-2.5/5 (b)"

Fig.2

Chemical structure analysis of materials. (a) FT-IR spectra of CA and BTCA-2.5/5; (b) Infrared spectra of catechin standard samples"

Fig.3

TG and DTG curves of CA and BTCA-2.5/5 under air and N2 atmosphere. (a) TG curves in air; (b) DTG curves in air; (c) TG curves in N2; (d) DTG curves in N2"

Tab.1

Thermal stability analysis related data of CA and BTCA-2.5/5"

样品 气氛 T10%/℃ T75%/℃ Vmax1/(%·min-1) Vmax2/(%·min-1) TVmax1/℃ TVmax2/℃ 残余比/%
CA 空气 252.39 402.79 -17.37 -6.81 340.39 457.99 —
氮气 257.28 388.48 -13.49 — 320.24 — 13.07
BTCA-2.5/5 空气 257.19 471.59 -9.93 -10.08 335.49 561.84 —
氮气 262.88 — -10.89 — 332.79 — 28.86

Fig.4

LOI of BTCA with different conditions. (a) LOI of BTCA with addition of summer and autumn tea during preparation of leaching solution; (b) LOI of BTCA with reaction time"

Fig.5

Combustion phenomenon of CA (a) and BTCA-2.5/5 (b) and their carbon slag state"

Fig.6

TG-FT-IR spectrum of CA (a) and BTCA-2.5/5 (b)"

Fig.7

SEM images, raman and infrared spectra of carbon slag. (a) SEM of BTCA-2.5/5 carbon; (b) FT-IR spectrum of BTCA-2.5/5 before and after combustion; (c) Raman spectrum of CA carbon slag; (d) Raman spectrum of BTCA-2.5/5 carbon slag"

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