Dielectric performance and conductive mechanism of KNN-based ceramics prepared via sol–gel core–shell process

Journal of Materials Science: Materials in Electronics - 0.95(Li0.02Na0.50K0.48)(Nb0.95Sb0.05)O3–0.05AgTaO3@BaZrO3 (LNKNbSAT@BZ) lead-free ceramics were prepared via a sol–gel...     

火麻仁油微乳凝胶面膜的制备及初步评价

目的:制备火麻仁油微乳凝胶补水面膜并对其理化性质、保湿性和抗氧化活性进行评价.方法:通过伪三元相图确定火麻仁油微乳最佳处方,采用单因素及正交试验优化火麻仁油微乳凝胶处方,载入保湿活性物质制得火麻仁油微乳凝胶面膜并对其质量、稳定性、保湿性和抗氧化活性进行评价.结果:火麻仁油微乳最佳处方:火麻仁油0.2％、PEG-20氢化蓖麻油0.53％、1,3丙二醇0.27％.火麻仁油微乳凝胶最佳处方为卡波姆-940含量1％,丙三醇含量5％,稀释倍数30倍.制得的微乳凝胶澄清透明、涂展性较好、易清洗、不油腻;平均粒径为(30.91±0.31)nm,PDI为0.299±0.017,电位为(-3.54±0.43)mV;黏度为494725.15 mPa·s;pH值为5.50±0.01;保湿效果优于市售某凝胶面膜;火麻仁油微乳凝胶面膜对DPPH自由基清除率高于火麻仁油毛油,质量浓度为6 mg·mL-1时可达62.39％,IC50为3.71 mg·mL-1.结论:火麻仁油微乳凝胶面膜安全、稳定,制备工艺简单,对皮肤具有良好的补水和抗氧化效果,具备开发和推广的价值.     

Surface Modification of Co3O4 Nanosheets to Promote Peroxymonosulfate Activation for Degradation of Atrazine

Catalysis Letters - This study proposed a new facile route to rational creating oxygen-vacancy (Vo)-rich surface of Co3O4 nanosheets by acetic acid leaching. The acid leached Co3O4 nanosheets was...     

Research on the Failure Characteristics of a Spherical Bearing

Strength of Materials - In order to study the failure process of a large-scale spherical bearing, the finite element simulation method was used to establish the full-scale finite element model of...     

Engineering A-site cation deficiency into LaCoO3 thin sheets for improved microwave absorption performance

Journal of Materials Science - Rationally designing microwave absorption materials with highly efficient and tunable bandwidth is in great demand but remains a huge challenge. In this study,...     

Enhanced thermal conductivity of PP hybrid films induced by filler orientation and laminated structure

Journal of Materials Science - Currently, polymeric composites with good thermal conductivity and simple preparation method are in the rapid increment of demand. In this work,...     

An Improved Approach for Spatial and Temporal Individual Risk Assessment Considering Synergistic Effects of Multiple Fires Occurred Sequentially

Fire Technology - The current research on individual risks mainly focuses on the individual risk considering a single fire or the spatial distribution of multiple fires. It is more realistic to...