Application of Modified Reed Straw in Polylactic Acid Composite Materials

被引：0

作者：

Liu X. ^{[1
,2
]}

Wang H. ^{[2
]}

Wu M. ^{[2
]}

Huang Y. ^{[2
]}

机构：

[1] College of Material Engineering, North China Institute of Aerospace Engineering, Langfang

[2] Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing

来源：

Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2021年 / 37卷 / 01期

关键词：

Esterification modification; Maleic anhydride; Mechanochemistry; Polylactic acid; Straw fiber;

D O I：

10.16865/j.cnki.1000-7555.2021.0036

中图分类号：

学科分类号：

摘要：

Straw natural fibers can be used as filler or reinforcing material in the field of composite material, but its disadvantages of large number of hydrophilic groups, poor interface compatibility with non-polar polymer materials affects the performance of composite materials, so the chemical modification of plant fiber becomes an effective mean to improve the interface bonding. In this paper, a solid-phase mechanochemical method was used to prepare maleic anhydride esterified modified reed straw (MA-RS). Results of SEM show that the straw is defibrated under the action of maleic anhydride combined with external force, and the fibers have high aspect ratio. FT-IR and XPS tests show that the degree of substitution of maleic anhydride groups on the fiber surface gradually increases with the increase of processing time. The composite materials were prepared by blending modified straw and polylactic acid. Due to the grafting of maleic anhydride, the surface properties of the straw fibers are changed, and the compatibility and interfacial bonding force between the straw fibers and polylactic acid(PLA) are improved. The mechanical test results show that, the tensile strength is increased by about 16%, and the impact strength is increased by about 30%. The SEM observation shows that the modified straw has the better interface compatibility with the PLA matrix than the unmodified straw. © 2021, Editorial Board of Polymer Materials Science & Engineering. All right reserved.

引用

页码：43 / 50

页数：7

共 18 条

[11]

Tserki V, Zafeiropoulos N E, Simon F, Et al., A study of the effect of acetylation and propionylation surface treatments on natural fibres, Composites Part A: Applied Science and Manufacturing, 36, pp. 1110-1118, (2005)

[12]

Belgacem M N, Czeremuszkin G, Sapieha S., Surface characterization of cellulose fibres by XPS and inverse gas chromatography, Cellulose, 2, pp. 145-157, (1995)

[13]

Iwamoto S, Endo T., 3 nm Thick lignocellulose nanofibers obtained from esterified wood with maleic anhydride, ACS Macro Letters, 4, pp. 80-83, (2015)

[14]

Huang Z Q, Liang X T, Hu H, Et al., Influence of mechanical activation on the graft copolymerization of sugarcane bagasse and acrylic acid, Polymer Degradation and Stability, 94, pp. 1737-1745, (2009)

[15]

Yang H P, Yan R, Chen H P, Et al., Characteristics of hemicellulose, cellulose and lignin pyrolysis, Fuel, 86, pp. 1781-1788, (2007)

[16]

Zhou L, He H, Li M C, Et al., Enhancing mechanical properties of poly(lactic acid) through its in-situ crosslinking with maleic anhydride-modified cellulose nanocrystals from cottonseed hulls, Industrial Crops & Products, 112, pp. 449-459, (2018)

[17]

Gonzalez-Lopez M E, Robledo-Ortiz J R, Manriquez-Gonzalez R, Et al., Polylactic acid functionalization with maleic anhydride and its use as coupling agent in natural fiber biocomposites: a review, Composite Interface, 25, pp. 515-538, (2018)

[18]

Park S, Baker J O, Himmel M E, Et al., Cellulose crystallinity index: measurement techniques and their impact on interpreting cellulase performance, Biotechnology for Biofuels, 3, pp. 1-10, (2010)

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