江西黑滑石增白试验的研究

本文分析了江西黑滑石中的铁对陶瓷白度的影响,并从混矿、加入NaCl、改变不同烧制工艺及磁选等方面分析对滑石增白的影响。     

黑滑石增白实验研究

研究了酸洗、漂白剂氯化钠、煅烧温度对江西某地区黑滑石的煅烧增白效果.实验结果表明:试样经过酸洗后,漂白剂氯化钠的用量为3％,煅烧温度为1100℃时,试样的白度最高,由原来的73.2°提高到了84.5°.     

黑滑石增白实验研究

研究了酸洗、漂白剂氯化钠、煅烧温度对江西某地区黑滑石的煅烧增白效果。实验结果表明：试样经过酸洗后,漂白剂氯化钠的用量为3％,煅烧温度为1100℃时,试样的白度最高,由原来的73．2°提高到了84．5°。     

黑滑石增白实验的研究

本文研究了酸洗、漂白剂氯化钠、煅烧温度对江西某地区黑滑石的煅烧增白效果的影响。实验结果表明：试样经过酸洗后,漂白剂氯化钠用量为3％．煅烧温度为1100℃时,试样的白度最高,由原来的67．2增加到了87．4。     

云南软质高岭土煅烧增白研究

采用我国云南软质高岭土为原料,研究其在煅烧过程中白度的变化规律,寻求提高煅烧软质高岭土白度较有效的助白剂,同时探讨了它们的增白机理,得出最佳煅烧工艺为:煅烧温度900℃,恒温时间1h,助白剂为NaCl,添加量2%,此时产品白度达到最大值.     

吉林某三级硅藻土煅烧增白试验研究

煅烧是硅藻土增白提纯的主要方法之一,本文以吉林某三级硅藻土作为研究对象,考察了Na2CO3,NaCl两种增白剂,在不同温度,药剂含量,试样含水量及煅烧时间的条件下对其增白效果,并确定了吉林某三级硅藻土适宜的增白条件.采用Na2CO3作为增白剂,硅藻土白度从原土的28.32％提高到63.76％.采用NaCl作为增白剂,硅藻土白度达到60.12％.     

开滦煤系煅烧高岭土增白工艺研究

探讨了开滦唐山矿的煤系高岭土增白工艺，对酸浸脱杂的温度、酸质量分数及煅烧工艺制度进行了深入研究，结果表明，唐山矿煤矸石可用于作造纸涂料级高岭土，白度可达92。     

硬石膏煅烧-酸浸提增白技术的研究

利用煅烧-酸浸提增白技术对安徽含山硬石膏原矿进行增白研究,考察了煅烧时间和温度、煅烧添加剂及用量、浸提酸浓度及温度等因素对石膏白度的影响。结果表明,优化增白工艺条件为：煅烧温度为800℃,煅烧时间为2 h,煅烧添加剂为NH4Cl,添加量为5%,浸提酸浓度为0.6 mol/L,浸提温度为70℃。可将硬石膏原矿白度从86.8%提高到100.8%。     

广丰黑滑石开发利用的技术报告

本文详细介绍了利用储量丰富的广丰黑滑石,不经煅烧,直接采用生料配料低温烧成的路线,研制出雪白如玉,氧化、还原气氛烧成均适宜的滑石细瓷,为一次烧成滑石瓷开创了一条新路子,并具有较大的经济优势和竞争能力.     

低品质叶蜡石的煅烧-酸洗增白研究

现有的低品质叶蜡石矿石中含有较大量的铁杂质,白度低,因此其应用受到了很大限制.常见的非金属矿的增白方法有物理磁选方法、酸洗法、煅烧法、还原法等,这些增白方法由于叶蜡石的特殊结构而对叶蜡石并不完全适用.针对叶蜡石的结构特点,研究在煅烧法和酸洗法的基础上,开发出了一种新的增白方法:煅烧-酸洗技术.利用这种方法对叶蜡石原矿进行除铁增白处理,成功地将白度为71%的叶蜡石原矿粉提高到90%以上,得到了高品质的叶蜡石粉.实验还进一步研究了煅烧温度、酸液质量分数和酸洗温度对叶蜡石白度的影响,得出了最佳工艺条件:煅烧时间为2 h,煅烧温度为700℃,酸液质量分数为20%,酸洗时间为2 h,酸洗温度为70～80℃.     

Mineralogical characteristics of unusual black talc ores in Guangfeng County,Jiangxi Province,China

A stratified deposit of unusual black talc, an occurrence of talc estimated to be more than half a billion tons, was found exposed in the late Neoproterozoic Dengying Formation, located in Guangfeng County, Jiangxi Province, southeastern China. The ores occur primarily as oolitic structures. The mineralogical and geochemical characteristics of the ores were investigated by using multiple techniques. The ores were found to mainly consist of talc (30–70%), dolomite, quartz, and magnesite. Most of talc crystals are ultrafine (with an average crystallite size of smaller than 5 μm) and appear as irregular broken or distorted lamellar flakes. The total organic carbon (TOC) content of the black talc ore samples is generally lower than 1.0%. Electron-microprobe analysis (EPMA) revealed low contents of Na, K, Ca and Mn, Fe, Ni, Al in the talc oolitic particles. The talc ores have low contents of toxic elements and relatively high contents of Li and Zn. The infrared spectrum of the black talc is similar to that of white talc from Trimouns (Pyrenees, France), and their Brunauer–Emmett–Teller (BET) specific surface areas, ranging from 15.7 to 23.2 m²/g, is much higher than those of white talc (normally lower than 5.0 m²/g), which may be due to the small size of the talc crystals.     

Influence of talc genesis and particle surface on the crystallization kinetics of polypropylene/talc composites

Talc is a laminar silicate, considered as an excellent nucleating agent for polypropylene (PP) crystallization. However, properties of PP/talc composites depend on the morphology, size, and surface of mineral particles. In this sense, talc from several ores, having different morphology, imparts specific characteristics on these materials. Also, taking into account that PP‐talc adhesion is not necessarily good due to the apolar character of PP, talc surface has been modified in order to increase this parameter. In this work, the effects of talc genesis, geomorphologic aspects, and particle surface characteristics on crystallization of PP/talc composites are analyzed. Isothermal crystallization of PP/talc composites was studied by using differential scanning calorimetry, based on Avrami model. The final crystalline morphology of talc‐filled PP was analyzed by means optical microscopy. The results show that the blocky talc morphology favors even more the crystallization compared to the platy one, at the same particle size. Taking into account the surface treatment studied in this work, the talc surface is made hydrophobic and the particle delamination is favored. As a consequence, so‐modified talc is very effective in increasing the crystallization temperature of PP and the nuclei number that grow during the crystallization with respect to the untreated talc. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

皮肤黑素成因分析与美白祛斑功效评价体系的研究

本文探讨了皮肤黑素细胞的生成与代谢、阻止黑素生物合成的关键因素,通过测定AA2G等几种典型美白剂对酪氨酸酶活性的抑制率建立了美白砝斑效果的功效评价体系。实验表明甘草等天然成份也有很好的美白祛斑效果。同时开展了高效安全的美白祛斑化妆品配方研究,产品有很好的市场前景。     

贵州某黑色页岩硫的迁出实验研究

根据贵州某地黑色页岩中含一定品位的硫及黑色页岩性质复杂等特点,考虑硫的迁出对环境造成的影响,进行了酸浸实验研究。经实验研究发现,酸浸时采用矿石粒度为150～375 μm、盐酸浓度为1.2 mol/L、浸出时间为4 h、浸出矿浆液固体积质量比为4 mL/g、浸出温度为30 ℃、搅拌强度为250 r/min时,硫的浸出率达较高值,可达23.73%,此时对周边环境影响较大。     

红茶、绿茶提取物联合应用的护肤功效研究

以红茶提取物、绿茶提取物为考察对象,考察了红茶提取物和绿茶提取物的单独及联合应用的防晒、保湿、抗氧化、美白、抗衰老等功能,测试了二者在以上功能联合应用是否具有协同增效作用。结果表明,红茶、绿茶提取物在保湿、抗氧化、美白、抗衰老等功能上,联合应用比二者单独应用效果更强,其中2 g/L红、绿茶提取物混合物在抑制酪氨酸酶、弹性蛋白酶方面的联合指数CI仅为0.29和0.054,协同增效效果显著。     

Asymmetric alumina-based ultrathin composite ceramic membranes with interfacial modification of black talc nanosheets

In this work, ultrathin planar alumina-based ceramic membranes with asymmetric structure and thickness less than 0.85 mm were successfully prepared by one-step molding phase transformation/sintering method using low-cost black talc (BT) nanosheets for the first time. The microstructure, pore structure, mechanical strength and permeability of novel ceramic membranes were systematically investigated with different BT amount and sintering temperatures. The doping of BT nanosheets effectively modulated the interfacial bonding area and strength between the grains, achieving significant increase in flexural strength through the evolution of the dense layer structure. The asymmetric structural features formed by the phase transformation/sintering process in combination with polymer substrate significantly reduced the thickness of effective separation layer, thus weakening the loss of flux caused by the densification of the film layer due to the interfacial modification process. Moreover, the organic carbon layers between BT layers were oxidized during the sintering process, forming fine pores and increasing the porosity, which showed to be unique characteristic different from other clay mineral materials. The prepared composite membrane had the pure water flux up to 16335 L m⁻² h⁻¹/bar at 1350 °C sintering, which achieved stable permeation of ∼5200 L m⁻² h⁻¹/bar and high retention over 90% for O/W emulsions.     

石灰石流态化煅烧探索研究

为了高效回收利用废弃石灰石资源,对粒径为0.5~1 mm的石灰石进行了静态煅烧和流态化煅烧实验,比较了其产物活性度的差别,探索流态化煅烧制备高活性度石灰的可行性。实验结果表明：流态化煅烧过程中煅烧时间、煅烧温度对产物活性都有影响。随着温度的升高,得到最佳产物活性的煅烧时间会缩短,在此时间之后,继续煅烧产物活性会下降;相比静态煅烧,流态化煅烧不仅提高了石灰石分解的速率,也提高了产物烧结的速率,大幅度缩短了煅烧时间,同时能够在短时间内得到高活性的石灰。在本实验中,石灰石在1 050 ℃下流化煅烧3 min,得到的产物活性度为338 mL;流态化煅烧过程中,煅烧温度越高,产物活性度对煅烧时间的变化越敏感。     

一款美白产品的功效研究

制备一种美白精华乳,并对其美白和保湿功效进行研究。选择24名女性志愿者,按要求在前臂内侧持续使用美白精华乳8周,测试皮肤相应位置的MI值、L*值、ITA°值、皮肤角质层水分含量的变化情况。结果表明,使用化妆品8周后,皮肤的MI值、L*值、ITA°值和水分含量与初始值之间具有显著性差异(P<0.05),表明产品具有一定的美白和保湿功效。     

硫酸镍煅烧的实验研究

硫酸镍煅烧可以产生镍氧化物,作为制备氧化镍的原料。以六水硫酸镍为原料,采用热重-差热分析（TG-DTA）、X射线衍射（XRD）分析研究了其煅烧过程并对产物进行了表征。研究结果表明,硫酸镍煅烧过程分为3个阶段：第一阶段（27~250 ℃）及第二阶段（250~600 ℃）为脱水阶段;第三阶段（600~900 ℃）为分解阶段。在煅烧温度为850 ℃、煅烧时间为30 min、粒度为74~147 μm条件下,硫酸镍煅烧产物为氧化镍。     

一款高效美白剂组合的研究

采用单因素试验的方法,通过测定市场常见的皮肤美白剂对酪氨酸酶活性的体外抑制率。结果表明：体外美白效果最好的为光甘草定,其次是AA2G,再次为熊果苷,它们的美白功效均优于具有美白功效的植物提取液。同时,通过正交设计实验得到一种高效的皮肤美白剂复配组合,复配组合的皮肤美白剂添加量分别为：光甘草定0.05%,AA2G1%,烟酰胺1%,芦荟粉0.3%。此复配组合对酪氨酸酶活性的抑制率高达98.97%。由此得到的一款美白乳液,pH值为6.6,通过稳定性实验,其结果符合QB/T2286—1997。