PBAT基可降解負離子釋放功能復合材料的制備
發(fā)布時間:2018-09-01 09:52
【摘要】:聚己二酸對苯二甲酸丁二酯(PBAT)是一種性能優(yōu)異的生物可降解高分子材料,但由于價格較高,限制了其應用,為了降低成本并賦予其負離子釋放功能,本文采用熔融共混的方法制備了幾種PBAT基可降解功能復合材料。為制備具有負離子釋放功能的可降解高分子材料,先用改性劑山梨醇酐單硬脂酸酯(span-60)對電氣石粉進行表面有機改性,然后采用濕法與PBAT熔融共混制備了PBAT/電氣石復合材料。實驗結果表明,當改性電氣石添加量為PBAT質量的3%時,150℃下攪拌120 min,電氣石在PBAT中有良好的的分散穩(wěn)定性,此時所得的PBAT/改性電氣石復合材料的力學強度最優(yōu)。DSC分析表明,電氣石的添加提高了PBAT的結晶度和結晶溫度,且制備的PBAT/電氣石復合材料的負離子釋放量達到了330個/cm3,為空氣中負離子數(shù)的2.06倍。為開發(fā)淀粉的應用,制備可降解產品,本工作討論了淀粉與PBAT的共混工藝,先用KH-560處理淀粉制備出熱塑性淀粉(TPS),然后與PBAT進行熔融共混,探索了淀粉與PBAT復合的最佳工藝條件:淀粉與PBAT的質量比為70:30,添加0.5%的硅烷偶聯(lián)劑KH-560,混煉溫度為140℃、混煉時間為20min。與未添加KH-560制備的淀粉/PBAT復合材料相比,添加KH-560后制備的TPS/PBAT復合材料的力學強度、耐水性和熱性能得到了提高。將改性電氣石加入到TPS/PBAT中制備了TPS/PBAT/電氣石復合材料。實驗結果表明,在電氣石含量為3%時制備出的復合材料的力學性能最優(yōu),其負離子量達360個/cm3,為空氣中負離子數(shù)的2.25倍。嘗試了采用40%的木粉填充PBAT,熔融共混制備了木粉/PBAT復合材料,探索出木粉與PBAT復合的最佳工藝條件:硅烷偶聯(lián)劑KH-560添加量為2%、混煉溫度為130℃、混煉時間為10min。與不加KH560制備的復合材料相比,添加KH-560后復合材料的力學性能、耐水性能和熱穩(wěn)定性能得到了提高。將改性電氣石加入到木粉/PBAT中,制備出了PBAT/木粉/電氣石復合薄膜,當電氣石添加量為1%時,電氣石均勻地分散在復合材料中,制得的復合材料的拉伸強度和彈性模量得到提升,且其負離子釋放量達到達310個/cm3,為空氣中負離子數(shù)的1.94倍。
[Abstract]:Poly (butylene adipate) (PBAT) is a biodegradable polymer with excellent properties, but its application is limited due to its high price. In this paper, several PBAT-based degradable functional composites were prepared by melt blending. In order to prepare degradable polymer materials with anion release function, the surface of tourmaline powder was modified by sorbitol anhydride monostearate (span-60), and then PBAT/ tourmaline composites were prepared by wet blending with PBAT. The experimental results show that the modified tourmaline has good dispersion stability in PBAT at 150 鈩,
本文編號:2216832
[Abstract]:Poly (butylene adipate) (PBAT) is a biodegradable polymer with excellent properties, but its application is limited due to its high price. In this paper, several PBAT-based degradable functional composites were prepared by melt blending. In order to prepare degradable polymer materials with anion release function, the surface of tourmaline powder was modified by sorbitol anhydride monostearate (span-60), and then PBAT/ tourmaline composites were prepared by wet blending with PBAT. The experimental results show that the modified tourmaline has good dispersion stability in PBAT at 150 鈩,
本文編號:2216832
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