Department of Materials Science, Faculty of Science, and National Center of Excellence for Petroleum, Petrochemicals and Advanced Materials, Chulalongkorn University, Bangkok, Thailand.
Waste Manag Res. 2010 Feb;28(2):109-17. doi: 10.1177/0734242X09339324. Epub 2009 Aug 26.
Hydrolysis of cotton fabric waste to produce microcrystalline cellulose (MCC) was carried out using 2.5 N hydrochloric acid at 100 degrees C for 30 min. Characterization of the structure, morphology, particle size as well as the thermal decomposition of the obtained MCC were studied using X-ray diffractometer, scanning electron microscope and laser light scattering particle size analyzer and thermogravimetric analyzer, respectively. These results indicated that the obtained MCC had a fibrous structure of a 40 microm average particle size and possessed a form of highly native crystalline cellulose I. In addition, its maximum degradation temperature was observed at 350 degrees C. The poly(vinyl chloride) (PVC) films in this work were produced by first blending the produced MCC with PVC resin in amounts of 5-30 parts per hundred of resin. The blends were then made into film using a two-roll mill. The tensile properties of the film were measured using a Universal Testing Machine. The biodegradation tests were carried out in soil and in a moisture-controlled chamber. The biodegradability was estimated by the loss of mass, moisture absorption capacity and electron microscope studies. It was found that the tensile strength and Young's modulus of the blends increased with increasing amounts of MCC. Similarly, moisture absorption and biodegradability of the films were also increased as the amount of MCC increased. The results implied that MCC behaved not only as a reinforcing filler but also as a biodegradability promoter of PVC films.
采用 2.5N 盐酸在 100°C 下反应 30 分钟，对棉织物废料进行水解以生产微晶纤维素（MCC）。利用 X 射线衍射仪、扫描电子显微镜、激光光散射粒度分析仪和热重分析仪分别对结构、形貌、粒径以及所得到的 MCC 的热分解进行了研究。这些结果表明，所得到的 MCC 具有 40 微米平均粒径的纤维状结构，并且具有高度天然结晶纤维素 I 的形式。此外，其最大降解温度在 350°C 观察到。在这项工作中，聚氯乙烯（PVC）薄膜首先通过将所生产的 MCC 以每百份树脂 5-30 份的量与 PVC 树脂共混来制备。然后，使用双辊轧机将共混物制成薄膜。使用万能试验机测量薄膜的拉伸性能。在土壤中和水分控制室内进行了生物降解测试。通过质量损失、吸湿性和电子显微镜研究来估计生物降解性。结果表明，随着 MCC 用量的增加，共混物的拉伸强度和杨氏模量增加。同样，随着 MCC 用量的增加，薄膜的吸湿性和生物降解性也增加。结果表明，MCC 不仅可以作为增强填料，还可以作为 PVC 薄膜的生物降解促进剂。
