FDM快速成型技术在动漫模型制作中的应用

由于传统加工无法满足动漫模型形状复杂、单件小批量,制作周期短,而3D打印技术中的FDM快速成型技术可以解决这些问题。根据FDM快速成型技术成本低、体积小、无污染以及制作速度快的特点,利用简易型快速成型机完成了一批客户急需的动漫模型的制作。针对模型在制作过程中由加工设备、加工参数等因素产生的冷却收缩变形以及开裂等缺陷进行了分析。提出了对模型抽壳或者掏空的方案减小了模型的冷却收缩变形,优化了加工工艺参数以提高模型的质量和制作的效率。

高比表面积多孔Si层柱蒙脱土材料的合成和表征

Using natural Na montmorillonite as the host clay, porous silica-pillared montmorillonites (Si-PILC) were prepared by the template synthesis method. Furthermore, the texture and structure of such composite materials were investigated by using modern several physicochemical techniques such as powder X-ray Diffraction (XRD), X-ray Fluorescence (XRF), Fourier Transformation Infra-red Spectra (FT-IR), and N2 adsorption/desorption measurements. The results reveal that tetrathylorthosilicate (TEOS) agent has been successfully intercalated into the montmorillonite and the characteristic d001 spacing of Si-PILC increases from 1.28nm to 3.15nm. The resultant products with large gallery height possess BJH pore volume as large as 0.30cm^3/g, remarkably high BET specific surface area of over 592.0m^2/g, pore size distribution in the mesopore region 3.3nm^4.3nm after thermal treatment at 800℃.

复频超声声化学激活血卟啉抗肿瘤效率的研究

用1,3-二苯基异苯并呋喃(DPBF)检测了超声激活血卟啉的效率,作了单、复频超声激活效率的对比。实验结果表明,复频超声对激活效率有一定的增强效果,400kHz+1.2MHz(强度分别为1.0W/cm2,5.0W/cm2)比400kHz+800kHz(强度都为1.0W/cm2)复频激活血卟啉HPD的增强效果要高些,在辐照时间为0～100s,血卟啉浓度为50μg/mL时,前者最多是单频作用效果之和的1.5倍,而后者最多是单频作用效果之和的1.3倍。这一结果对声动力学疗法应用于临床具有重要的意义。指出了进一步提高复频超声激活血卟啉效率的途径。