改性凹凸棒石/苏木复合颜料的制备和性能  

Preparation and properties of modified palygorskite/sappanwood hybrid pigments

作　　者：刘晓艺 崔红岩 曹力化 姜超[2] 唐颖 冯拥军[2] LIU Xiaoyi;CUI Hongyan;CAO Lihua;JIANG Chao;TANG Ying;FENG Yongjun(Beijing Key Laboratory of Plant Resources Research and Development,School of Light Industry Science and Engineering,Beijing Technology and Business University,Beijing 100048,China;State Key Laboratory of Chemical Resource Engineering,College of Chemistry,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京工商大学轻工科学与工程学院北京市植物资源研究开发重点实验室,北京100048 [2]北京化工大学化学学院化工资源有效利用国家重点实验室,北京100029

出　　处：《精细化工》2024年第9期2006-2017,2030,共13页Fine Chemicals

基　　金：甘肃省白银市2021年度科技揭榜挂帅项目;甘肃萃华科技有限公司合作项目(H2020292)。

摘　　要：用盐酸处理凹凸棒石(PAL)制备了酸洗凹凸棒石(PA),然后对PA进行有机改性(壳聚糖、阳离子表面活性剂双十八烷基二甲基氯化铵、硅烷偶联剂KH550)制备了3种改性PAL(PCS、PDO、PKH),最后以PA、PCS、PDO、PKH负载苏木色素制备了4种改性凹凸棒石/苏木复合颜料(简称复合颜料,下同)PAS、PCSS、PDOS、PKHS。通过FTIR、XRD、TEM、BET、TG及颜色表征,探究了不同改性方法对复合颜料的粉体学性质、稳定性和生物安全性的影响。结果表明,有机改性和苏木色素负载并未改变PAL的晶相结构和纤维形态;复合颜料显著提高了苏木色素的热稳定性、酸碱稳定性和遮盖性能。复合颜料PCSS表现出较佳的综合性能,包括最好的热稳定性〔120℃处理6 h,总色差值(ΔE)<6〕和酸碱稳定性(pH=5~7浸泡24 h,ΔE<4),最低的水和乙醇溶出度(2.13和1.02 mg/g),及较好的生物安全性(无血管刺激性)。Three kinds of modified palygorskite(PAL)(PCS,PDO,PKH)were prepared by organic modification of PA(chitosan,cationic surfactant dioctadecyl dimethyl ammonium chloride,silane coupling agent KH550),which were obtained from hydrochloric acid treatment of PAL,and PCS,PDO,PKH as well as PA were then loaded with sappanwoood color to synthesize four types of modified palygorskite/sappanwood hybrid pigments(short for hybrid pigment,the same below).Through FTIR,XRD,TEM,BET,TG and color characterization,the effects of different modification methods on the powder properties,stability and biosafety of hybrid pigments were further analyzed.The results showed that organic modification and sappanwoood color loading did not change the crystal structure and fiber morphology of PAL,while the hybrid pigments significantly improved the thermal stability,acid-base stability and covering power of sappanwoood color.Hybrid pigment PCSS prepared from chitosan modified PAL showed better comprehensive properties,improved thermal stability(ΔE<6 on exposure to 120℃for 6 h),the best acid-base stability(ΔE<4 on soaking in pH=5~7 solution for 24 h),the lowest water-alcohol dissolution degree(2.13 mg/g in water and 1.02 mg/g in ethanol),and high biosafety(non-irritant to vascular membrane).

关 键 词：凹凸棒石 苏木色素 壳聚糖 复合颜料 稳定性 日化原料 

分 类 号：TQ622[化学工程—精细化工] TQ625