纳米SiO_2表面处理对MC尼龙复合材料结构与性能的影响

为提高MC尼龙的综合性能,采用KH-550硅烷偶联剂处理纳米SiO2,根据阴离子聚合反应制备MC尼龙SiO2纳米复合材料,探讨了表面处理纳米SiO2与熔体的作用机理,并进行复合材料的结构表征与性能测试.研究表明：纳米SiO2表面包覆硅烷偶联剂,其有机官能团氨基进攻聚合反应体系中酰亚胺结构的羰基,两者通过化学键实现界面结...     

碳酸钙对PVC低发泡板材成型的影响

探讨碳酸钙在PVC低发泡板挤出加工中,对发泡效果、加工性能及发泡板材料性能等的影响。试验结果表明:碳酸钙的粒径2μm以下,其质量与PVC的质量比为3%~7%时,发泡效果和泡孔质量最佳,发泡制品强度最好。     

高性能矿渣的活化研究

硅灰、超细矿渣及超细粉煤灰的各自不利因素，使其已不能适应工程发展的需要。本文对矿渣采用适宜的化学＋物理活化工艺，可以有效激发活性，提高矿渣水泥早期强度、使其性能优化，具有显著的经济效益及较大的推广价值。     

湿排粉煤灰的活化及其应用研究

利用纳米技术及纳米制备方法处理粉煤灰, 使其表面形成纳米、微米尺寸的活化腐蚀层,或利用化学反应形成纳米、微米尺寸的活化沉淀物, 可大大提高粉煤灰水泥的早期强度和后期强度及粉煤灰掺量。经处理的系列活化粉煤灰具有早强、减水效果, 可用作混凝土掺和料, 掺量达30%~50%, 具有一定的应用和推广价值。     

承重粉煤灰加气混凝土的研究

在粉煤灰加气混凝土生产中，应用外加剂和活性粉煤灰技术可以生产超高强加气混凝土，其抗压强度为８．０￣１０．０ＭＰａ，而密度仅为８００ｋｇ／ｍ＾３，适用于砌体结构的承重墙体。本文表明：超高强度机理是以加速反应初始时期钙硅水化热反应和从ＧＳＨ（Ｂ）到托勃莫莱石的相转化，增加托勃莫莱石数量和改善加气混凝土的气孔结构。     

推广一种新的孔结构计算方法

对材料进行结构性能的研究,其中重要的指标是材料的孔结构参数。目前,研究材料孔结构方法和技术手段有多种。而其中应用较为普遍的是以汞作为吸附介质的压汞渗透法。武汉工业大学制品教研室于1983年引进一台意大利“CARLO ERBA”200系列在汞     

THE STUDY OF MINERAL COMPONENTS IN KAOLINE FROM HUNAN JIEPAI

This paper finds out distributive pattern ofprincipal minerals in Jiepai kaoline and demonstrates theblack matter to be not onganic matter but fine scaly mica-hematite aggregate in black vein mud,the nanometer mineral-portlandite Ca(OH)_2 in this kaoline is discovered.     

Hydrothermal synthesis of xonotlite-type calcium silicate insulation material using industrial zirconium waste residue

Xonotlite-type insulation material was prepared by hydrothermal synthesis technology using industrial zirconium waste residue in this paper,and the phase analysis together with the observation of micro–morphology were also carried out by XRD,SEM and TEM.The density and thermal conductivity were measured finally.The results indicate,chlorine ion impurity contained in zirconium waste residue can be removed effectively via water washed process,and the reactive activity of silicon dioxide is almost not affected,which make it be a good substitution of silicon material for the preparation of calcium silicate insulation material by hydrothermal synthesis technique.The density and thermal conductivity of xonotlite-type calcium silicate insulation material obtained by hydrothermal synthesis technique can reach 159 kg/m3,0.049 W/(m·° C),respectively,meeting with National Standard well,when synthesis conditions are selected as follows:Ca/Si molar ratio equal to 1,synthesis temperature at 210°C and kept for 8 hrs.It provides a new approach to realize lightweight and low thermal conductivity of calcium silicate insulation material.     

ERROR ESTIMATION OF INTERPOLATION ON PORE STRUCTURE ANALYSIS

In this paper we computed the data of porestructure with Lagrange interpolation method.analyzed theconvergence of the method and deduced the corresponding errorestimation formula.