稻草秸秆经碱煮预处理后,用环氧氯丙烷在120℃下以甲苯为溶剂反应1～8h。醚化程度用增重率（weight percent gain,WPG）表示。考察反应时间对醚化产率的影响,并采用傅里叶红外变换光谱、X射线衍射分析、热分析和扫描电镜分析,对所制备的环氧氯丙烷改性稻草进行表征。结果表明,预处理后半纤维素和木质素被去除,醚化反应后,稻草样品的结晶度降低,热稳定性略有降低,表面积增大。
Etherification of rice straw with epichlorohydrin was carried out at 120℃ for 1-8h in toluene with NaOH as a base.The extent of etherification was estimated by the use of weight percent gain（WPG） as an indication.The effects of reaction time on WPG and etherification effect were investigated.Nature rice straw,pretreated rice straw and epichlorohydrin-modified rice straw were characterized by non-destructive techniques,e.g.Fourier transform infrared（FT-IR）,X-ray diffraction（XRD）,thermal analysis（TA） and scanning electronic microscopy（SEM） to investigate the reaction progress and etherification effect.Characterization results indicated that the crystallinity and the thermal stability of the modified rice straw decreases due to the etherification,and the surface became rough after modification.
参考文献
| [1] | 叶代勇,黄洪,傅和青,陈焕钦.纤维素化学研究进展[J].化工学报,2006(08):1782-1791. |
| [2] | Yang HS.;Kim DJ.;Kim HJ. .Rice straw-wood particle composite for sound absorbing wooden construction materials[J].Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies,2003(2):117-121. |
| [3] | Kim SJ;Moon JB;Kim GH;Ha CS .Mechanical properties of polypropylene/natural fiber composites: Comparison of wood fiber and cotton fiber[J].Polymer Testing,2008(7):801-806. |
| [4] | Yeh S K;Gupta R K .[J].Composites Part A:Applied Science and Manufacturing,2008,39(11):1694-1699. |
| [5] | Ashori A .Wood-plastic composites as promising green-composites for automotive industries![J].Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies,2008(11):4661-4667. |
| [6] | 陈玉放;揣成智;谢来苏 .[J].广州化学,1998,23(01):56-64. |
| [7] | 余权英.化学改性转化木材为热塑性和热固性材料[J].化学进展,1996(04):331. |
| [8] | 黄昱,刘晓辉,陈初阳,邢莹,王林山.环氧氯丙烷改性稻草的光降解研究[J].环境保护科学,2008(05):69-72. |
| [9] | 牛盾,王林山,王育红,孙挺.环氧氯丙烷改性稻草[J].应用化学,2005(09):1033-1035. |
| [10] | Chen LM.;Mccann MC.;Wilson RH. .INVESTIGATION OF MACROMOLECULE ORIENTATION IN DRY AND HYDRATED WALLS OF SINGLE ONION EPIDERMAL CELLS BY FTIR MICROSPECTROSCOPY[J].Journal of Molecular Structure,1997(0):257-260. |
| [11] | Stewart D;Wilson HM;Hendra PJ;Morrison IM .FOURIER-TRANSFORM INFRARED AND RAMAN SPECTROSCOPIC STUDY OF BIOCHEMICAL AND CHEMICAL TREATMENTS OF OAK WOOD (QUERCUS RUBRA) AND BARLEY (HORDEUM VULGARE) STRAW[J].Journal of Agricultural and Food Chemistry,1995(8):2219-2225. |
| [12] | 詹怀宇.纤维化学与物理[M].北京:科学出版社,2005:109. |
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