Department of Chemistry, Ilam Branch, Islamic Azad University, Ilam, Iran.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2013;48(12):1516-21. doi: 10.1080/10934529.2013.796830.
This study investigates the effect of Poly (ϵ-Caprolactone (PCL) and Nano-SiO2content within the Carboxymethyl Cellulose (CMC) blends on the rate and extent of carboxymethyl cellulose enzymatic hydrolysis using the enzyme cellulase. The results reveal that blends with Nano-SiO2content at 5 wt% exhibit a significantly reduced rate and extent of CMC hydrolysis. This may be attributed to interactions between CMC and SiO2that prevent further enzymatic attack on the remaining CMC phases within the blend. The total solids that remained after 2880 min were 44.8 wt.% (CMC: PCL); 62.7 wt.% (CMC: PCL: 1% Nano-SiO2); 69.8 wt.% (CMC: PCL: 3% Nano-SiO2); 73.1 wt.% (CMC: PCL: 5% Nano-SiO2). Enzymatic degradation behaviour of CMC: PCL: Nano-SiO2was based on the determinations of water resistance, weight loss and the reducing sugars. The degraded residues have been examined by scanning electronic microscopy (SEM) and UV-Vis spectroscopy.
本研究采用酶纤维素酶考察了聚（ε-己内酯）（PCL）和纳米二氧化硅（nano-SiO2）在羧甲基纤维素（CMC）共混物中的含量对 CMC 酶水解速率和程度的影响。结果表明，纳米 SiO2 含量为 5wt%的共混物的 CMC 水解速率和程度显著降低。这可能是由于 CMC 和 SiO2 之间的相互作用阻止了酶进一步攻击共混物中剩余的 CMC 相。2880min 后剩余的总固体为 44.8wt%（CMC：PCL）；62.7wt%（CMC：PCL：1%纳米-SiO2）；69.8wt%（CMC：PCL：3%纳米-SiO2）；73.1wt%（CMC：PCL：5%纳米-SiO2）。CMC：PCL：纳米-SiO2 的酶降解行为基于水阻力、失重和还原糖的测定。通过扫描电子显微镜（SEM）和紫外可见光谱对降解残留物进行了检查。
