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中国生物工程杂志

China Biotechnology
China Biotechnology
China Biotechnology  2019, Vol. 39 Issue (7): 32-38    DOI: 10.13523/j.cb.20190705
    
Effects of Thermal Oxidative Aging on Wheat Straw / Rubber Biomass Imitation Rattan
Shi-qiang ZHU1,Xiang-an LU1,2,Chun-han YU1,Yi-fan DAI1,Yue QIU1,Ji-shuang CHEN1,*()
1 College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, Chin
2 Guangling College of Yangzhou University, Yangzhou 225000, China
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Abstract  

Straw plastic composite (SPC) is a novel wood - plastic material in which wood fibers are replaced by straw fibers.Wheat straw / rubber biomass imitation rattan from wheat straw, rubber and low density polyethylene( LDPE) was prepared. The changes of mechanical properties and microstructures were investigated in the period of thermal-oxidative aging at 100℃ for 60d. The results showed that the addition of wheat straw fiber will reduce the mechanical properties while the rubber can enhance the elongation break. During the aging process, cracks appearing on the surface of rattan cut down mechanical properties. And the losing of functional groups between the surface of straw fiber and PE caused the reduction of combining ability. In combination with the kinetic model, the degradation occurred rapidly in the beginning of the 15 days with the aging coefficient up to 70% and kept a low rate in the rest of the experiment. Furthermore, the addition of rubber could slow down the aging rate of rattan.

Key words： Wheat straw      Rubber      Thermal oxidative aging      Imitation rattan      Composites     
Received: 30 November 2018      Published: 05 August 2019
ZTFLH:  Q819  
Corresponding Authors: Ji-shuang CHEN     E-mail: biochenjs@njtech.edu.cn
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Shi-qiang ZHU
Xiang-an LU
Chun-han YU
Yi-fan DAI
Yue QIU
Ji-shuang CHEN
Cite this article:

Shi-qiang ZHU,Xiang-an LU,Chun-han YU,Yi-fan DAI,Yue QIU,Ji-shuang CHEN. Effects of Thermal Oxidative Aging on Wheat Straw / Rubber Biomass Imitation Rattan. China Biotechnology, 2019, 39(7): 32-38.

URL:

https://manu60.magtech.com.cn/biotech/10.13523/j.cb.20190705     OR     https://manu60.magtech.com.cn/biotech/Y2019/V39/I7/32

编号 改性麦秸秆(%) 橡胶(%) LDPE (%)
1 10 3 87
2 12.5 0 87.5
3 15 0 85
4 10 5 85
5 10 7 83
6 10 0 90
Table 1 Composite formulation experiment
Fig.1 Infrared spectrum of different aging time of composite materials
Fig.2 Scanning electron micrograph of wheat straw/rubber imitation rattan
秸秆含量(%) 拉伸强度(MPa)
0天 3天 6天 9天 12天 15天 30天 40天 50天 60天
10 10.11 10.51 11.12 11.37 11.66 11.31 11.15 12.73 脆断 脆断
12.5 9.47 11.51 11.37 11.14 11.48 12.21 脆断 脆断 脆断 脆断
15 9.09 11.25 11.4 11.29 11.81 12.41 脆断 脆断 脆断 脆断
Table 2 Variation of tensile strength of imitation rattan with different wheat straw powder content with aging time
Fig.3 Variation of tensile strength of imitation rattan with different wheat straw powder content with aging time
橡胶含量(%) 拉伸强度 (MPa)
0天 3天 6天 9天 12天 15天 30天 40天 50天 60天
0 10.1 10.51 11.12 11.37 11.66 11.31 11.15 12.73 脆断 脆断
3 9.68 12.01 11.78 11.55 11.83 12.56 13.28 14.4 13.71 13.3
5 10.5 11.18 11.71 11.3 12.3 13.57 13.77 15.05 14.23 14.04
7 10.5 11.1 11.42 11.31 13.8 13.92 13.97 14.7 13.82 13.79
Table 3 Effect of rubber content on tensile strength of imitation rattan (WS content 10%)
Fig.4 Tensile strength of different rubber content imitation rattan with aging time (WS content 10%)
秸秆含量(%) 断裂伸长率(%)
0天 3天 6天 9天 12天 15天 30天 40天 50天 60天
10 335 137 50 35 13 6 5 3 脆断 脆断
12.5 345 62 18 21 17 11 脆断 脆断 脆断 脆断
15 242 58 29 19 15 18 脆断 脆断 脆断 脆断
Table 4 Variation of elongation at break of different straw stalks of imitation rattan with aging time
Fig.5 Change of elongation at break of imitation rattan with different wheat straw powder content with aging time
Fig.6 The elongation at break of different rubber content imitation rattan changes with aging time (WS content 10%)
橡胶含量(%) 拉伸强度 (MPa)
0天 3天 6天 9天 12天 15天 30天 40天 50天 60天
0 335 137 50 35 13 6 5 3 脆断 脆断
3 316 167 86 39 18 10 6 5 3 3
5 443 254 135 69 39 23 16 15 13 10
7 449 382 324 230 187 146 48 27 24 20
Table 5 Effect of rubber content on tensile strength of imitation rattan (WS content 10%)
Fig.7 Relationship between -lne and time under different modified wheat straw content
Fig.8 Relationship between -lne and time under different rubber content conditions
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