Preparation of Novel Composite from Natural Rubber, Bagasse and Plaster

The sugar cane bagasse was treated with chemical treatment including sodium hydroxide and silane. The characterization of the modified bagasse was achieved with Fourier transform infrared spectroscopy （FTIR）, and scaning electron microscopy （SEM）. Results showed that the presence Si-CH3 group occurred on bagasse surface after chemical modification. In addition, the roughness of the modified bagasse was higher than that of unmodified bagasse due to chemical modification from sodium hydroxide. Two polymer composite types, namely （1） natural rubber NR/sugar cane bagasse and （2） NR/plaster via two-roll mill method, were prepared. The optimum cure （t90） and torque of the NR/plaster increased with increasing plaster loading in composite. In case of NR/bagasse, the tgo of this sample decreased as a function of sugar cane bagasse while torque of this sample increased with increasing sugar cane bagasse. The modulus of the resulting composite increased with increasing both plaster and sugar cane bagasse, but the tensile strength and elongation at break of the composite decreased as a function of both piaster and sugar cane bagasse in composite.

新型壳聚糖改性天然橡胶纳米纤维的制备与性能研究

本研究工作的目的是制备和表征环氧化天然橡胶-g-壳聚糖(ENR-g-CTS)/聚乙烯醇(PVA)复合材料纳米纤维。用静电纺丝技术制备了ENR-g-CTS/PVA复合材料纳米纤维,并用SEM、TEM和AFM方法观察ENR-g-CTS/PVA复合材料纳米纤维的微观形态。PVA纳米纤维和ENR-g-CTS/PVA复合材料纳米纤维的平均直径分别为约250和144 nm。与纯环氧化天然胶(ENR)相比,ENR-g-CTS在自然环境条件下的分解效果更好。此外,透过由ENR-g-CTS/PVA复合材料制备的载体膜,CSC释放20小时后的最大累积释放量达到18%。