水酸化カルシウムのエトキシド化と生成物の性質
1981 年 1981 巻 175 号 p. 245-252
詳細
1981 年 1981 巻 175 号 p. 245-252
As a part of the current studies to improve characteristics of inorganic composite materials by the interaction between inorganic and organic substances, the previous paper reported the formation mechanism and the characteristics on the hydrate of Ca (OH) 2-CH3OH system which formed by immersing CaO and Ca (OH) 2 in CH3OH.
In this paper, the interaction between Ca (OH) 2 and C2H5OH by autoclaving or immersing in C2H5OH were studied, using CaO and Ca (OH) 2 as starting materials. The characteristics of the hydrate of Ca (OH) 2-C2H5OH system such as particle size, surface property and thermal stability for inorganic filler were mainly explained.
By immersing or autoclaving CaO and Ca (OH) 2 in C2H5OH, C2H5O group in C2H5OH invasioned easily in OH layer of layer structured Ca (OH) 2 of CdI2 type and then the ethoxidation (Ca-OC2H5 bond) progressed. However the degree of the ethoxidation promoted remarkably by autoclaving rather than the immersion. In the case of CaO, the hydrate containing 20% as C2H5O group of Ca (OH) 2-C2H5OH system which formed by autoclaving at 10 kg/cm2 for a period of five hours, produced as thin hexagonal plate-like shape with ultrafine particle size of 0.02-0.06μm (specific surface area being 165m2/g). The hydrate dispersed in several organic solvents and its surface was changed into lipophilic. The hydrate had excellent characteristics of inorganic filler for plastic, rubber and paper in comparison with that of Ca (OH) 2-CH3OH system described in previous work.
