矿粉种类对PBAT/PLA共混物力学与散发性能的影响

陈业中; 龚德君; 付学俊; 李建军; 曾祥斌; 欧阳春平

doi:10.15925/j.cnki.issn1005-3360.2025.02.018

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塑料科技 ›› 2025, Vol. 53 ›› Issue (02) : 97-102. DOI: 10.15925/j.cnki.issn1005-3360.2025.02.018

生物与降解材料

矿粉种类对PBAT/PLA共混物力学与散发性能的影响

陈业中 ¹^,²^,³ ,
龚德君 ¹^,²^,³ ,
付学俊 ¹^,²^,³ ,
李建军 ¹^,²^,³ ,
曾祥斌 ¹^,²^,³ ,
欧阳春平 ¹^,²^,³^,^*

作者信息 +

Influence of Mineral Powder Types on Mechanical and Emission Properties of Poly(Butylene Adipate-co-Terephthalate)/Polylactic Acid Blends

CHEN Yezhong ¹^,²^,³ ,
GONG Dejun ¹^,²^,³ ,
FU Xuejun ¹^,²^,³ ,
LI Jianjun ¹^,²^,³ ,
ZENG Xiangbin ¹^,²^,³ ,
OUYANG Chunping ¹^,²^,³^,^*

Author information +

History +

摘要

采用熔融共混法制备聚对苯二甲酸-己二酸丁二醇酯（PBAT）、聚乳酸（PLA）和无机矿粉的共混物，探究矿粉种类对于PBAT/PLA薄膜力学性能与散发性能的影响。结果表明：当滑石粉的粒径足够小时，对应的PBAT/PLA薄膜的拉伸强度优于添加相同含量碳酸钙的PBAT/PLA薄膜。随着滑石粉的D50粒径从2.5 μm上升至10 μm，PBAT/PLA薄膜纵向与横向的拉伸强度逐步下降。撕裂与落镖测试发现，添加碳酸钙的PBAT/PLA薄膜韧性最优，这是因为碳酸钙一般采用硬脂酸包覆活化，可以有效地将碳酸钙分散至基体中，撕裂时可以有效地承担外部的应力。随着滑石粉粒径增大，PBAT/PLA薄膜韧性下降。云母、晶须和硅灰石在共混体系中分散不良，因此膜面存在较多的缺陷点，PBAT/PLA薄膜韧性较差。滑石粉填充的PBAT/PLA薄膜气味等级总体低于碳酸钙填充的PBAT/PLA薄膜，且雾化后“油污”现象较轻微。但高粒径滑石粉或者云母、晶须和硅灰石在共混时与基体间具有强剪切作用，生成的总挥发性有机化合物（TVOC）以及部分挥发性有机化合物（VOC）含量较大。

Abstract

The melt-blending method was employed to prepare blends of poly(butylene adipate-co-terephthalate) (PBAT), polylactic acid (PLA), and inorganic mineral powders, with the aim of investigating the effects of different mineral powders on the mechanical and emission properties of PBAT/PLA films. The results showed that when the particle size of talcum powder was sufficiently small, the tensile strength of the corresponding PBAT/PLA film was superior to that of PBAT/PLA films containing the same amount of calcium carbonate. As the D50 particle size of talcum powder increased from 2.5 μm to 10 μm, the tensile strength of the PBAT/PLA film in both the longitudinal and transverse directions gradually decreased. Tear and dart impact tests revealed that PBAT/PLA films containing calcium carbonate exhibited the best toughness. This is because calcium carbonate is generally surface-treated with stearic acid, which effectively disperses it within the matrix and allows it to effectively bear external stress during tearing. As the particle size of talcum powder increased, the toughness of the PBAT/PLA film decreased. Mica, whiskers, and wollastonite showed poor dispersion in the blend system, resulting in numerous defect points on the film surface and poor toughness of the PBAT/PLA film. PBAT/PLA films filled with talcum powder had a lower overall odor level compared to those filled with calcium carbonate, and exhibited a milder "oil stain" phenomenon after fogging. However, high-particle-size talcum powder, as well as mica, whiskers, and wollastonite, generated significant shear forces with the matrix during blending, leading to higher levels of total volatile organic compounds (TVOC) and certain volatile organic compounds (VOCs).

关键词

聚对苯二甲酸己二酸丁二醇酯 / 聚乳酸 / 矿粉 / 气味 / 挥发性有机化合物

Key words

Poly(butylene adipate-co-terephthalate) / Polylactic acid / Mineral powder / Odor / Volatile organic compounds

中图分类号

TB324

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导出引用

陈业中 , 龚德君 , 付学俊 , 等. 矿粉种类对PBAT/PLA共混物力学与散发性能的影响. 塑料科技. 2025, 53(02): 97-102 https://doi.org/10.15925/j.cnki.issn1005-3360.2025.02.018

CHEN Yezhong, GONG Dejun, FU Xuejun, et al. Influence of Mineral Powder Types on Mechanical and Emission Properties of Poly(Butylene Adipate-co-Terephthalate)/Polylactic Acid Blends[J]. Plastics Science and Technology. 2025, 53(02): 97-102 https://doi.org/10.15925/j.cnki.issn1005-3360.2025.02.018

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基金

国家重点研发计划项目(2022YFC3901805)

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Received	Published
2024-06-14	2025-02-25
Issue Date
2025-04-17

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