Journal
INDUSTRIAL CROPS AND PRODUCTS
Volume 171, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.indcrop.2021.113954
Keywords
Nano-xylan; Straw fiber; HDPE composite; Anti-fungi performance; Response surface; Ultrasonically assisted alkaline treatment
Categories
Funding
- National Natural Science Foundation of China [U1806225, 51778220]
- Fundamental Research Funds for the Central Universities [531118010493]
- National Defense Science & Technology Innovation District Program [19-H863-03-ZT-003-033-01, 17-H863-03-ZT-003-008-06]
- High-Tech Industry Science and Technology Innovation Leading Plan of Hunan Province [2020GK2079]
- High-level Talent Gathering Project of Hunan Province [2018RS3057]
- Science and Technology Program of Changsha City [kq1907115]
- Jilin Province Department of Education Fund [JJKH20190650K]
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This study aimed to enhance the anti-fungi performance of straw fiber/HDPE composite with synthesized nano-xylan. By optimizing experimental conditions and analyzing the anti-fungal effects, it was found that the nano-xylan treatment has the potential to improve durability of the composite with environmentally-friendly characteristics.
Degradation due to wood rot fungi is one of the most severe threats to the long-term performance of plant fiber reinforced thermoplastic composite. This study aims to enhance the anti-fungi performance of the straw fiber/ HDPE composite with synthesized nano-xylan. The nano-xylan was prepared with corn xylan through the ultrasonically assisted alkaline treatment. It was found that the maximum yielding rate (25.7 %) can be obtained with 280 W ultrasonic power, 8% NaOH solution, 100 degrees C treatment temperature, and 150 min treatment time. In addition, the dimension of the nano-xylan decreases with increasing treatment temperature. The anti-fungi effects of the nano-xylan on the corn straw bast fiber and straw fiber/HDPE composite were then examined by analyzing the microstructure with SEM, and measuring the mass loss and strength loss. The findings suggest that after a 12-week infection, The nano-xylan treated corn straw bast fiber can retain its integrity after a 12-week infection and the formation of hyphae clusters inside the cell cavity can be prevented. The mass loss and strength loss of the composite can also be minimized through nano-xylan treatment. The results in this study may provide an environment-friendly protocol to enhance the durability of the composite.
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