Introducing amine functionalities on a poly(3-hydroxybutyrate-co-3-hydroxyvalerate) surface:: Comparing the use of ammonia plasma treatment and ethylenediamine aminolysis
Introducing amine functionalities on a poly(3-hydroxybutyrate-co-3-hydroxyvalerate) surface:: Comparing the use of ammonia plasma treatment and ethylenediamine aminolysis
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DOI：
10.1021/bm050497a
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发表时间：
2006-02-01
影响因子：
6.2
通讯作者：
Grondahl, L
中科院分区：
文献类型：
--
作者：
Keen, I;Broota, P;Grondahl, L
采用射频氨等离子体处理和湿法乙二胺处理，在聚3-羟基丁酸-co-3-羟戊酸（PHBV）薄膜表面引入胺类官能团。利用x射线光电子能谱（XPS）和拉曼光谱（Raman microspectroscopy）对改性表面的化学成分和空间分布进行了表征。通过在XPS分析之前将处理过的薄膜暴露于三氟甲基苯甲醛（TFBA）的蒸气中来确定引入PHBV表面的胺官能团的相对数量。氨水等离子体在处理时间为5和10 s时，PHBV表面的氨基引入量最高，但在2.5 ~ 20 W范围内，等离子体功率对PHBV表面的氨基引入量没有影响。乙二胺处理得到的表面氨基较少，结晶度增加，并且从傅里叶变换红外光谱可以看出PHBV的降解。Raman图谱显示，PHBV表面的氨基覆盖是不均匀的，有大片区域没有氨基功能。
Amine functionalities were introduced onto the surface of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) films by applying radio frequency ammonia plasma treatment and wet ethylenediamine treatment. The modified surfaces were characterized by X-ray photoelectron spectroscopy (XPS) for chemical composition and Raman microspectroscopy for the spatial distribution of the chemical moieties. The relative amount of amine functionalities introduced onto the PHBV surface was determined by exposing the treated films to the vapor of trifluoromethylbenzaldehyde (TFBA) prior to XPS analysis. The highest amount of amino groups on the PHBV surface could be introduced by use of ammonia plasma at short treatment times of 5 and 10 s, but no effect of plasma power within the range of 2.5-20 W was observed. Ethylenediamine treatment yielded fewer surface amino groups, and in addition an increase in crystallinity as well as degradation of PHBV was evident from Fourier transform infrared spectroscopy. Raman maps showed that the coverage of amino groups on the PHBV surfaces was patchy with large areas having no amine functionalities.