【摘 要】
：
A kind of novel cellulose ether-trihydroxybutyl cellulose (THBC) was synthesized. The process includes the steam explosion treatment of cotton cellulose, alkali
【机 构】
：
School of Material Science and Engineering
论文部分内容阅读
A kind of novel cellulose ether-trihydroxybutyl cellulose (THBC) was synthesized. The process includes the steam explosion treatment of cotton cellulose, alkalization, etherification and purification. Sweep electron microscope (SEM), Fourier transform infrared (FTIR) and X-ray diffraction were used to characterize the cellulose pretreated and the product. The effects of reaction conditions (temperature, time) on the molecular substitution (Sm) were discussed. To obtain a higher degree of molecular substitution, the reaction temperature is 80 ℃, and the reaction time is 4 h.
其他文献
分析了悬浮转子式微陀螺基本原理、技术关键,提出了悬浮转子式微陀螺的多种实现方案和技术要害,并综述了悬浮转子微陀螺多种方案的最新研究进展。
The basic principle and
2007年度的诺贝尔经济学奖使得机制设计理论受到广泛的关注,图书馆学对该理论的吸收引入问题就此凸现.本文在一次专题讨论的基础上,从理论研究到实践运用的层面分析探讨了图
利用DSC法研究了高氯酸[四氨.双(5-硝基四唑)]合钴(Ⅲ)(BNCP)的热分解性能,并与苯并三氧化呋咱(BTF)和超细六硝基茋(HNS-Ⅳ)的热分解性能进行了比较,用Kissinger法和Ozawa法
近年来大学生党员队伍规模不断扩大，随之而来一些问题也相伴出现。2013年6月以来，党的群众路线教育实践活动全面深入开展，以“为名、务实、清廉”为主题，以贯彻落实八项规定为切
为全面深化高职院校教育教学改革，切实提高高职教育动态管理水平，此文率先提出了“就业后交互式服务”的新理念；并从牛顿定律和情感定律的角度，论证了支撑这一崭新理念的科学依据
该文给出了CN中锥上关于多重次调和函数的一个Phragmé-Lindel(o)f定理,从而推广了文献[8]的一个结论.
7-Azidoacetamido-4, 6-dinitro-benzofuroxan has been synthesized from the starting materials of chloroacetyl chloride and m-chloroaniline, and has been character
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7
This paper considers the problem of stabilization of a class of nonlinear systems, which are possibly of non-minimum phase. A new feedback-equivalent canonical
Ten full-scale steel beam-to-column moment connections used in moment-resisting frames (MRFs) were tested to study the failure process, failure mode, strength a