JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
·
2014
·Vol. 25
·期 11
·1956-1964
·
IF 1.253
Dong Jianwei,Cai Le,Zhu Xiufang,Huang Xing,Yin Tianpeng,Fang Haixian,Ding Zhongtao
Cornhusk, corncob, and stigma maydis were extracted with water, aqueous ethanol, aqueous methanol, and ethyl acetate, respectively. The total phenolic contents (TPC), total flavonoid contents (TFC), total ketosteroid contents (TKC), and antioxidant activities [2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and 2,2'-diphenyl-1-picrylhydrazyl (DPPH) and 2,4,6-tri(2-pyridyl)-1,3,5-triazine (TPTZ) radical-scavenging activity, reducing power, and ferric reducing-antioxidant power (FRAP)] of the above extracts were investigated. Their main antioxidant components were further determined and quantified by high performance liquid chromatography (HPLC). The results revealed that the aqueous ethanol and aqueous methanol were more efficient in extracting antioxidant constituents from cornhusk, corncob, and stigma maydis. Eight main antioxidant components were detected from above three by-products, and the contents of four main antioxidant components were determined. The present work revealed that the cornhusk and corncob showed similar high TPC, TFC, TKC, and antioxidant activities with stigma maydis, and could be used as potential candidates for the prevention of diseases related to various oxidant by-products of human metabolism.
研究领域:
植物化学
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食品科学
·
药理学
✓ 已验证
DOI
高影响因子
Advanced Sustainable Systems
·
2022
·Vol. 6
·期 5
·2100495
·
IF 6.737
Kairui Zhang,Liangliang Zhu,Huayang Li,Mei Zheng,Jun Zhang,Yongjun Zheng,Rongbo Zheng
Biomass-based plastics (BPs), produced from natural polymers using a bottom-up strategy, have been used to alleviate the environmental pollution caused by petrochemical-based plastics (PCPs). Such BPs, however, typically require complex manufacturing processes, resulting in higher costs and reduced eco-friendly features. Herein, a delignification-splicing-based strategy without adhesives for directly converting corn ( Zea mays L.) husks to corn husk-based plastic (CHP) is described. During this process, lignin is removed from the corn husks and the pores collapse to form a dense structure. The CHP, which combines high mechanical strength (118 MPa) and a Young's modulus of 7.8 GPa with excellent light transmittance (86%), can be prepared in large sheets and can potentially replace non-renewable, non-biodegradable PCPs. Each hm 2 of cornfield can generate 1.2 hm 2 of CHP annually using the strategy. The process is simple, green, scalable, and as low cost as traditional PCPs since the only consumables are corn husks, NaClO, and water. Functional CHPs, such as fluorescent or hydrophobic CHPs, can be fabricated by impregnating delignified corn husk with carbon dots before pressing or by post-pressing hydrophobilization, respectively. This work develops an alternative green and sustainable technology for eco-friendly BPs, adds value to agricultural waste, and reduces greenhouse gas emissions.
研究领域:
材料科学
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环境科学
·
可持续技术
·
农业工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Qifeng Chen,Jieyi Xiong,Guangxue Chen,Taiyan Tan
In this paper, nanocellulose was extracted from agricultural waste corn husks. Transparent hydrophobic membranes containing silica were fabricated through two facile methods including surface coating and internal grafting. The results showed that: the nanocellulose prepared by TEMPO-mediated oxidation and high pressure homogenization not only retained the type and crystal structure of the original cellulose , but also increased the crystallinity to 64.5% and improved the thermal stability . Both surface coating and internal grafting methods had successfully loaded silica onto films. The internal grafting film had a silica content of 10.5%, which was mainly present inside the film. The light transmittance of this film was 84.4% and the surface contact angle to water was 152.6°. The content of silica on the surface coating film was 5.7%, and they were mainly distributed on the surface of the film to form a nano-scale rough surface. The light transmittance of the surface coating film was 87.8% and the surface contact angle to water was 165.7°. Compared to the film prepared by internal grafting method, the nanocellulose film prepared by surface coating method contained less nano silica and had better properties including higher transparency, higher surface roughness and excellent hydrophobic anti-fouling properties.
研究领域:
材料科学
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纳米技术
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农业工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FIBERS AND POLYMERS
·
2016
·Vol. 17
·期 11
·1820-1828
·
IF 1.022
Yang Xue,Liu Hui,Zhao Yanjiao,Liu Lifang
Cellulose nanocrystals (CNCs) extracted from corn husks were used as additive to modify the hydrophilicity and anti-fouling properties of polysulfone (PSf) membrane. The PSf/CNCs blend membranes were prepared via an immersion phase inversion method. The influence of CNCs content on the morphology, structure, and performances of PSf membrane were carefully investigated by SEM, TG, DTG, DSC, break strength, elongation-at-break, Young modulus, contact angle and filtration experiment. The results showed that the isolated CNCs from corn husks were a promising additive for modifying the properties of PSf membrane. CNCs can improve mechanical property, thermal stability, hydrophilicity and anti-fouling performance of the pure PSf membrane. The PSf/CNCs blend membrane reached optimal properties at 2 wt% CNCs content, which was 2.76 and 1.57 times in pure water flux and FRR values respectively as compared to pure PSf membrane. Meanwhile, PSf-2 also can maintain a relatively high BSA rejection.
研究领域:
材料科学
·
纳米技术
·
膜技术
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）