枣核/低密度聚乙烯复合材料的力学性能

卢文玉; 蔡红珍; 于文凡; 徐航; 韩祥生

doi:10.13801/j.cnki.fhclxb.20200909.004

枣核/低密度聚乙烯复合材料的力学性能

卢文玉^{1, 2,},
蔡红珍^{1, 2,},
于文凡^{1, 2},
徐航^{1, 2},
韩祥生^{1, 2, ,}

1.
山东理工大学　农业工程与食品科学学院，淄博 255000
2.
山东省清洁能源工程技术研究中心，淄博 255000

基金项目: 国家重点研发计划项目(2018YFD1101001)

详细信息

通讯作者:
韩祥生，博士，讲师，硕士生导师，研究方向为生物基材料　 E-mail：hanxs@sdut.edu.cn

中图分类号: TB332；TS209
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出版历程
- 收稿日期: 2020-07-05
- 录用日期: 2020-08-29
- 网络出版日期: 2020-09-09
- 刊出日期: 2021-06-22

Mechanical properties of jujube pit/linear low density polyethylene composites

LU Wenyu^{1, 2,},
CAI Hongzhen^{1, 2,},
YU Wenfan^{1, 2},
XU Hang^{1, 2},
HAN Xiangsheng^{1, 2, ,}

1.
School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
2.
Shandong Research Center of Engineering and Technology for Clean Energy, Zibo 255000, China

摘要

摘要: 为充分利用红枣精深加工产生的废弃物，以枣核(JP)和低密度聚乙烯(LLDPE)为主要材料，采用注塑成型法制备JP/LLDPE复合材料，并对其静态力学性能(拉伸、弯曲和冲击)和动态力学性能(动态黏弹性、蠕变行为和应力松弛行为)进行系统测试分析。静态力学性能分析表明，随JP含量的增加，JP/LLDPE复合材料的拉伸强度和冲击强度逐渐降低，但复合材料的弯曲强度得到明显的提升。当JP添加量为20wt%时，JP/LLDPE复合材料的弯曲强度最高，较纯LLDPE的弯曲强度提高63.57%；动态力学分析表明，JP含量的增加有利于提高JP/LLDPE复合材料的刚性、抗蠕变性能和抗应力松弛性能，而温度的升高会对JP/LLDPE复合材料的抗蠕变性能和抗应力松弛性能产生不利的影响。
- 枣核 /
- 低密度聚乙烯 /
- 复合材料 /
- 废弃物利用 /
- 力学性能
Abstract: In order to make full use of the waste generated during the deep processing of red jujube, jujube pit (JP) and linear low density polyethylene (LLDPE) composites were prepared by injection molding method with JP and LLDPE as the main components. The static mechanical properties (tensile, flexural and impact) and dynamic mechanical properties (dynamic viscoelastic, creep behavior and stress relaxation behavior) were fully tested and analyzed. The static mechanical properties analysis show that the tensile and impact strength of JP/LLDPE composites are decreased as the JP contents increase, while the flexural strength of the composites is obviously improved. When the addition contents of JP reach 20wt%, the JP/LLDPE composite exhibit optimal flexural strength, which is 63.57% higher than that of pure LLDPE. Dynamic mechanical analysis confirms that the increase of JP contents is beneficial to improve the rigidity, creep resistance and stress relaxation of JP/LLDPE composites, but the increase of temperature adversely affects the creep resistance and stress relaxation resistance of JP/LLDPE composites.
- jujube pit /
- low density polyethylene /
- composites /
- waste utilization /
- mechanical properties

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图 1 JP和JP/LLDPE复合材料冲击断面的SEM图像

Figure 1. SEM images of JP and JP/LLDPE composite impact profiles

下载: 全尺寸图片幻灯片

图 2 LLDPE和JP/LLDPE复合材料的静态力学性能

Figure 2. Static mechanical properties of LLDPE and JP/LLDPE composites

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图 3 LLDPE和JP/LLDPE复合材料的储能模量 (a) 和损耗因子 (b) 与温度的关系

Figure 3. Relationship between storage modulus (a) and loss factor (b) of LLDPE and JP/LLDPE composites with temperature

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图 4 LLDPE和JP/LLDPE复合材料的储能模量 (a) 和损耗因子 (b) 与频率的关系

Figure 4. Relationship between storage modulus (a) and loss factor (b) of LLDPE and JP/LLDPE composites with frequency

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图 5 JP/LLDPE 复合材料在不同条件下的蠕变曲线

Figure 5. Creep curves of JP/LLDPE composites under different conditions

下载: 全尺寸图片幻灯片

图 6 JP/LLDPE复合材料在不同条件下的应力松弛曲线

Figure 6. Stress relaxation curves of JP/LLDPE composites under different conditions

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表 1 枣核/低密度聚乙烯(JP/LLDPE)复合材料配方

Table 1 Formulations of jujube pit/linear low density polyethylene (JP/LLDPE) composites wt%

No.	10wt% JP/LLDPE	20wt% JP/LLDPE	30wt% JP/LLDPE	40wt% JP/LLDPE	50wt% JP/LLDPE
JP	10	20	30	40	50
LLDPE	80	70	60	50	40
TPW604	2	2	2	2	2
Calcium stearate	2	2	2	2	2
MAPE	6	6	6	6	6
Note: MAPE—Maleic anhydride grafted polyethylene.

下载: 导出CSV

表 2 JP的组成成分

Table 2 Composition of JP wt%

Cellulose	Hemicellulose	Lignin	Ash	Water extract
29.73±0.51	28.48±0.75	31.60±0.45	1.35±0.36	8.84±0.58

下载: 导出CSV

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