Properties of Modified Wheat Straw Powder/Polypropylene Composites

Qin LIU; Jian-wen CHENG; Ya-qin WANG; Wen LEI

doi:10.14028/j.cnki.1003-3726.2021.07.007

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Properties of Modified Wheat Straw Powder/Polypropylene Composites

更新时间：2022-08-30

- Properties of Modified Wheat Straw Powder/Polypropylene Composites
- Polymer Bulletin Vol. 34, Issue 7, Pages: 58-64(2021)
- 作者机构：
  
  南京林业大学理学院,南京 210037
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2021.07.007
  CLC：
- Published：20 July 2021，
  
  Received：05 March 2020，
  
  Revised：28 January 2021，
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Qin LIU, Jian-wen CHENG, Ya-qin WANG, Wen LEI. Properties of Modified Wheat Straw Powder/Polypropylene Composites. [J]. Polymer Bulletin 34(7):58-64(2021)
DOI：

Qin LIU, Jian-wen CHENG, Ya-qin WANG, Wen LEI. Properties of Modified Wheat Straw Powder/Polypropylene Composites. [J]. Polymer Bulletin 34(7):58-64(2021) DOI： 10.14028/j.cnki.1003-3726.2021.07.007.

摘要

研究了碱处理(AT)、苯甲酸(BA)或/和硬脂酸(SA)改性对小麦秸秆粉(WSP)/聚丙烯(PP)复合材料(WSP/PP-CM)力学性能、热稳定性能、流变性能、润湿性能和吸水性能的影响。结果表明:碱处理可提高WSP/PP-CM 的拉伸强度(TS)、弯曲强度(FS)、冲击强度(IS)、起始热分解温度(T

)和接触角(

)

而使平衡扭矩(BT)和吸水率(WU)减小

因为AT 使得WSP表面活性增加、疏水性增强。在AT 基础上再进行BA 或者SA改性

WSP/PP-CM 的TS、FS、IS及T

继续提高

BT进一步降低;在AT基础上再进行BA/SA 复合改性

WSP/PP-CM 的TS、FS、IS及T

大幅提高了41.21%、32.02%、38.68%和35.7℃

BT进一步下降至9.7N·m。AT后再进行BA或/和SA改性

复合材料的疏水性虽然优于未改性WSP/PP-CM

但效果均不及单纯的AT。

Abstract

Effects of alkalli treatment(AT)

modification by benzoic acid(BA) or/and stearic acid(SA) on mechanical properties

thermal stability

rheological properties

wettability and water uptake of wheat straw powder(WSP) reinforced polypropylene(PP) composites(WSP/PP-CM) were studied. Results show that

when WSP was alkalli treated

the tensile trength(TS)

flexural strength(FS)

impact strength(IS)

initial decomposition temperature(T

) of WSP/PP-CM and the contact angle(

) between WSP/PP-CM and distilled water can be increased

respectively

while the balance torque(BT) and water uptake(WU) decreases. These may be due to the increased surface activity and enhanced hydrophobicity of the WSPthe by AT. After alkalli treatment

if the WSP was modified by BA or SA again

IS and Ti of WSP/PP-CM can be increased while BT decreased. After alkalli treatment

if the WSP was modified by BA and SA together again

IS and Ti of WSP/PP-CM can be increased by 41.21%

32.02%

38.68% and 35.7℃ while BT decreased to 9.7N· m. The hydrophobicity of the composites was better than that of the unmodified WSP/PP-CM

although the effect was less than that of AT alone.

关键词

塑木复合材料小麦秸秆粉聚丙烯碱处理苯甲酸硬脂酸

Keywords

Wood-plastic compositeWheat straw powderPolypropyleneAlkalli treatmentBenzoic acidStearic acid

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