甘油衍生有机碳酸盐:用于PLA的环保性塑化剂
Hyeon Jeong Seo1, Yeong Hyun Seo1, Sang Uk Park1
1Department of Molecular Science and Technology, Ajou University Suwon 16499 South Korea bunyeoul@ajou.ac.kr pclee@ajou.ac.kr +82-31-219-2394 +82-31-219-1844.
RSC advances
|February 6, 2024
概括
新的可生物降解的有机碳酸盐增强了多乳酸 (PLA) 的柔性,而不会影响稳定性. 这些增塑剂提高了PLA的性能,但不会在环境条件下加速其生物降解.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 绿色化学 绿色化学
背景情况:
- 聚乳酸 (PLA) 是一种可再生的,可生物降解的聚合物,但具有脆性,限制了其应用.
- 塑化剂通常用于提高PLA的灵活性,但其对环境的影响和长期稳定性是令人担忧的.
研究的目的:
- 从可再生资源合成新的生物可降解有机碳酸盐.
- 为了评估这些碳酸盐作为聚乳酸 (PLA) 的塑化剂.
- 评估用这些新型化合物塑化PLA的生物降解性和长期稳定性.
主要方法:
- 使用甘油和二甲基碳酸盐 (DEC) 或二甲基碳酸盐 (DMC) 合成四种有机碳酸盐 (1-4).
- 通过对25°C的土壤暴露来评估生物降解性.
- 使用DSC,DMA,SEM和风湿学评估塑化剂的有效性和与PLA的兼容性.
- 对PLA混合物的拉伸性能测试.
- 使用DMA的长期稳定性和增塑剂迁移研究.
主要成果:
- 合成的有机碳酸盐 (1-4) 在环境条件下表现出快速的生物降解性.
- 有机碳酸盐1被证明是有效的PLA增塑剂,提高了高达30的可塑性.
- 与PLA/ATBC混合物相比,PLA/1混合物表现出优越的形态稳定性,没有观察到结晶或塑化剂迁移.
- 在六个月的环境土壤条件下,添加可生物降解的增塑剂并没有提高PLA的生物降解率.
结论:
- 新的生物降解有机碳酸盐可以从可再生原料中合成.
- 这些化合物有效地塑化了PLA,增强了它的柔性和长期形态稳定性.
- 虽然塑化剂本身是可生物降解的,但它们在环境条件下不会加速PLA矩阵的降解.
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