Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (08): 90-95.doi: 10.13475/j.fzxb.20200808206

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Optimization and characterization of flavonoids extracted from jute fiber

CUI Qilu1,2, LI Jiawei1, PAN Liugui1, YANG Fei1,3, YU Chongwen1,2()   

  1. 1. College of Textiles, Donghua University, Shanghai 201620, China
    2. Key Laboratory of Textile Science & Technology, Ministry of Education, Donghua University, Shanghai 201620, China
    3. Zhejiang Golden Eagle Co., Ltd., Zhoushan, Zhejiang 316051, China
  • Received:2020-08-20 Revised:2021-05-06 Online:2021-08-15 Published:2021-08-24
  • Contact: YU Chongwen E-mail:yucw@dhu.edu.cn

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Abstract:

In order to confirm the existence of flavonoids in jute fiber and to develop the application value, the jute fiber extracts were obtained using alcohol-water method. The content of flavonoids in the extraction solution was tested using ultraviolet spectrophotometer. The extraction process was optimized based on the use of quadratic general rotary design, and the relationships between the three factors(alcohol volume fraction, bath ratio and extracting time) and the extraction rate of flavonoids were studied. The chemical structure, thermal stability and morphology of jute fiber extracts after rotary evaporation and vacuum freeze drying were tested and analyzed. The results show that the chemical structure of jute fiber extracts is similar to the structure of rutin standard, which indicates that it contains flavonoids. The optimal extraction conditions were found to be ethanol volume fraction 75%, bath ratio 1∶50, and extracting time 150 min, at which the extraction rate of flavonoids was 0.037%.

Key words: jute fiber, flavonoid, responsive surface analysis, extraction process, alcohol-water method

CLC Number: 

  • TS121

Tab.1

Factors coding in experiment"

水平 A
乙醇体积分数x1/%		 B
浴比x2		 C
时间x3/min
-1.682(-γ) 60 1∶30 60
-1 64 1∶34 78
0 70 1∶40 105
1 76 1∶46 132
+1.682(+γ) 80 1∶50 150

Tab.2

Experiment design and extraction rate for each test"

试验号 x0 A B C 提取率ye/%
1# 1 1 1 1 0.007 8
2# 1 1 1 -1 0.012 2
3# 1 1 -1 1 0.012 2
4# 1 1 -1 -1 0.014 7
5# 1 -1 1 1 0.013 3
6# 1 -1 1 -1 0.013 3
7# 1 -1 -1 1 0.007 4
8# 1 -1 -1 -1 0.018 3
9# 1 1.682 0 0 0.004 9
10# 1 -1.682 0 0 0.003 9
11# 1 0 1.682 0 0.006 1
12# 1 0 -1.682 0 0.018 6
13# 1 0 0 1.682 0.008 7
14# 1 0 0 -1.682 0.020 1
15# 1 0 0 0 0.012 5
16# 1 0 0 0 0.023 0
17# 1 0 0 0 0.014 4
18# 1 0 0 0 0.015 3
19# 1 0 0 0 0.007 7
20# 1 0 0 0 0.017 2

Tab.3

Regression coefficient estimation and significance test result"

项目 数值 t检验 显著性
b0 0.013 2.182 476>t0.1(10) 显著
b1 -0.003 654 0.924 61<t0.1(10) 不显著
b2 -0.002 69 0.680 67<t0.1(10) 不显著
b3 -0.003 974 1.005 57<t0.1(10) 不显著
b12 -0.002 708 1.658 43<t0.1(10) 不显著
b13 0.006 855 4.197 795>t0.01(10) 显著
b23 0.004 458 2.799 45>t0.02(10) 显著
b11 -0.008 6 2.235 4>t0.05(10) 显著
b22 -0.006 5 1.689 63<t0.1(10) 不显著
b33 0.002 561 0.665 714> t0.1(10) 显著

Tab.4

Significance test result of regression equation"

指标 F1 F2 Fα1 Fα2 显著性
提取率 0.66 1.68 F0.01(5,5)=11.0 F 0 . 25(9,10)=1.56 显著

Fig.1

Response of different parameters and their interaction on extraction rate of flavonoid. (a) Alcohol volume fraction and bath ratio;(b) Alcohol volume fraction and extraction time;(c) Extration time and bath ratio"

Tab.5

Validation test of optimal process"

试验号 因子 指标
y/%
x1/% x2 x3/min
8# 64 1∶34 78 0.018 3
12# 70 1∶30 105 0.018 6
14# 70 1∶40 60 0.020 1
16# 70 1∶40 105 0.023 0
最优解 预测值 75 1∶50 150 0.036 1
实测值 75 1∶50 150 0.037 0
较优解1 预测值 75 1∶47 150 0.032 3
实测值 75 1∶47 150 0.019 8
较优解2 预测值 75 1∶46 150 0.031 5
实测值 75 1∶46 150 0.018 0

Fig.2

FT-IR spectra of rutin and jute fiber extracts"

Fig.3

Surface SEM image of jute fiber extracts (×300)"

Tab.6

Element composition and content of jute fiber extracts"

元素 质量百分比/% 标准偏差
C 69.81 0.90
O 24.87 0.84
Na 0.43 0.11
Si 2.14 0.14
Cl 1.11 0.14
K 0.67 0.14
Ca 0.97 0.18

Fig.4

Thermal property of jute fiber extracts. (a) DSC curves; (b) TG and DTG curves"

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