摘要
采用水热酸化法从磷石膏中提取硫酸钙晶须(CSW),利用质量分数30%的双氧水羟基活化CSW,通过溶液浇铸法制备聚氧化乙烯/改性硫酸钙晶须(PEO/m CSW)复合薄膜。利用红外光谱仪(FTIR)对m CSW进行分析,利用差示扫描量热仪(DSC)、热失重分析仪(TG)、X射线衍射(XRD)、扫描电子显微镜(SEM)对PEO/m CSW复合薄膜的性能及微观结构进行表征。结果表明:当m CSW添加量为3%,m CSW在PEO基体中分散较均匀,与PEO基体之间的结合性较强,PEO/m CSW的拉伸强度达到最大值。m CSW能够减缓PEO复合薄膜的结晶速率。当m CSW添加量为3%,PEO复合薄膜热分解温度达到最大值(371.9℃)。较低m CSW添加量时,PEO复合薄膜的SEM断面表明二者间无明显界面,m CSW颗粒分布较均匀。
Calcium sulfate whiskers(CSW) were prepared from phosphogypsum by hydrothermal acidification and CSW was hydroxyl groups activated by 30% hydrogen peroxide. Polyoxyethylene/modified calcium sulfate(PEO/m CSW)composite film were prepared by solution casting method. CSW before and after modification were analyzed by infrared spectroscopy, the properties and microstructure of PEO/m CSW composite films were characterized by differential scanning calorimeter(DSC), thermogravimetric analyzer(TG), X-ray diffraction(XRD), scanning electron microscope(SEM). The results show that m CSW disperses well in the polymer matrix and has strong adhesion with the matrix when the mass fraction of m CSW is 3%. Moreover, the tensile strength reaches the extreme value. m CSW can slow down the crystallization rate of PEO composite films. When the m CSW mass fraction is 3%, the thermal decomposition temperature of the PEO composite film reaches the maximum value of 371.9 ℃. When the amount of m CSW is lower, the SEM crosssectional photos of PEO composite films show that there is no obvious interface between them, and the distribution of m CSW particles is relatively uniform.
作者
王应明
李乾波
陈怡
肖耀
王奎
黄伟江
严伟
WANG Ying-ming;LI Qian-bo;CHEN Yi;XIAO Yao;WANG Kui;HUANG Wei-Jiang;YAN Wei(School of Chemistry and Materials,Guiyang University,Guiyang 550005,China;Guizhou Polytechnic of Construction,Guiyang 551400,China)
出处
《塑料科技》
CAS
北大核心
2022年第5期58-61,共4页
Plastics Science and Technology
基金
贵州省科技支撑计划项目(黔科合支撑[2021]一般488)
贵州省优秀青年科技人才项目(黔科合平台人才[2021]5622)
贵州省“千”层次创新型人才项目(黔人领发[2020]04)
贵州省教育厅创新群体项目(黔教合KY字[2020]024)。
关键词
磷石膏
硫酸钙晶须
聚氧化乙烯
力学性能
微观结构
Phosphogypsum
Calcium sulfate whiskers
Polyethylene oxide
Mechanical properties
Microstructure
