【摘 要】
：
The column wicking technique was applied to estimate the surface free energy of cellulose, the importance of which is to obtain a real effective capillary radiu
【机 构】
：
State Key Laboratory for Chemical Fiber and Polymer Modification The Central Laboratory of Material
【出 处】
：
Chinese Journal of Polymer Science
论文部分内容阅读
The column wicking technique was applied to estimate the surface free energy of cellulose, the importance of which is to obtain a real effective capillary radius, Reff, initially from the plot of Washburn penetration distance versus time. Since the cellulose sample could not be packed with good reproducibility, therefore, Reff can not be obtained readily from the slope of the plot. A method was developed in this paper by uniting all apparent packing heights with a unique value to deduce a real effective capillary radius. Based on the defined critical packing height related to the critical packing density, the surface free energy and acid-base properties of cellulose Sigma C8002 were estimated.
The column wicking technique was applied to estimate the surface free energy of cellulose, the importance of which is to obtain a real effective capillary radius, Reff, initially from the plot of Washburn penetration distance versus time. Since the cellulose sample could not be packed with a good was born from the slope of the plot. related to the critical packing density, the surface free energy and acid-base properties of cellulose Sigma C8002 were estimated.
其他文献
案例教学是教师教学方法常用的一种。教学的重点是教给学生案例分析、案例创新和案例思维的方法,为学生未来的案例应对与处理,打下方法论和思维习惯的基础。
Case teaching
银行汇款:请按下列项目办理收款单位:中国社会报社开户银行:中国工商银行北京分行王府井金街支行账号:0200000719004644871邮局汇款:请按下列项目办理单位:中国社会报社地址:
在汲取全国各地富有成效的教学成果的基础上,范公中学领导积极开拓思路,大胆创新,排除各种不利因素的制约,大力推行符合学校实际的高效课堂教学模式。其中355高效课堂教学模
The kinetics of catalytic hydrogenation of ortho-nitrochlorobenzene to 2,2’-dichloroazoxybenzene on platinum/carbon catalyst is investigated in a slurry reacto
社区文化建设是一项系统工程,政府应从建设和谐社会的战略高度认识加强社区文化建设的重要性,努力营造社区文化建设的良好氛围。社区居民共同生活于同一地域,在长时期的紧密
新课程标准中明确提出,教师要重视并加强常态课堂的合唱教学,让学生感受多声部音乐作品的艺术表现力,多角度地激发学生对音乐的学习兴趣。并通过积极参与合唱练习,在合唱中丰
高职院校酒店管理专业肩负着培养酒店服务与管理一线从业人员的使命,其教师的知识结构和技能水平则直接影响到酒店管理专业人才培养质量的高低。“校企合作”师资培养作为一
机会平等化是防止社会阶层分割和固化的重要基础。鉴于机会不平等普遍存在的不争事实,选择适宜的政策杠杆撬动社会机会分配格局,必将提升社会阶层结构的流动性。本文遵循机会
特别喜欢两本书的书名，一本是梁衡的散文集《人人皆可为国王》，这里的“国王”并不是权威的代名词，也摒弃了等级观念，指的是每一个人拥有的精神上的自由王国。只要保持快乐的心态，就一定能够打出属于自己的“天下”。一本是《环球科学》杂志社主编的《大象如何站在铅笔上》——超乎想象的科学解读，这是关于“石墨烯、大象、铅笔尖”的可能性想象。 这两本书之所以一下子就吸引了我，完全可以用三个字来概括，那便是“可能性
[目的]探讨健脾清肠方(JQD)对DSS诱导结肠炎小鼠肠道动力的作用机制。[方法]C57BL/6小鼠随机分为Control组、DSS组、JQD组、5-ASA组。除Control组外,余各组小鼠用5%DSS自由饮