高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (09): 2019.doi: 10.3969/j.issn.0251-0790.2012.09.025

• 物理化学 • 上一篇    下一篇

疏水球状碳酸钙的制备、表征及对聚丙烯力学性能的影响

赵丽娜1,2, 王继库1,2, 孔治国1,2, 王子忱3   

  1. 1. 吉林师范大学化学学院, 长春 130012;
    2. 环境友好材料制备与应用省部共建教育部重点实验室, 四平 136000;
    3. 吉林大学化学学院, 长春 130012
  • 收稿日期:2012-02-13 出版日期:2012-09-10 发布日期:2012-08-14
  • 通讯作者: 赵丽娜,女,博士,副教授,主要从事功能材料物理化学研究.E-mail:zhaolina1975@163.com E-mail:zhaolina1975@163.com
  • 基金资助:

    国家自然科学基金(批准号: 21077041)和吉林省教育厅"十二五"科学技术研究项目(批准号: 吉教科合字[2013]第200号)资助.

Preparation,Characterization of Hydrophobic Spherical CaCO3 Particles and Influence on Properties of Polypropylene

ZHAO Li-Na1,2, WANG Ji-Ku1,2, KONG Zhi-Guo1,2, WANG Zi-Chen3   

  1. 1. College of Chemistry, Changchun 130012, China;
    2. Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Ministry of Education, Jilin Normal University, Siping 136000, China;
    3. College of Chemistry, Jilin University, Changchun 130012, China
  • Received:2012-02-13 Online:2012-09-10 Published:2012-08-14
  • Contact: ZHAO LiNa E-mail:zhaolina1975@163.com

摘要:

以十二碳醇磷酸酯(DDP)为改性剂, 采用碳化法制备了分散性良好的球状碳酸钙粒子. 通过FESEM, XRD, FTIR及活化度和接触角测试对产物进行了表征. XRD分析结果表明, 随着DDP添加量的增加, 所得CaCO3由方解石型向文石型转变. FTIR结果表明, 改性剂与碳酸钙表面是以化学键合和物理吸附方式相结合. 当DDP含量达到2%时, 接触角为120.43°, 活化度达到99%, 碳酸钙粒子由亲水性转变为完全疏水性. 考察了反应温度和DDP含量对产物形貌与结晶行为的影响, 并对改性机理进行了初步探讨. 将产品填充到聚丙烯(PP)中, 测定了PP的力学性能.

关键词: 疏水性, 球状碳酸钙, 十二碳醇磷酸酯, 表面改性

Abstract:

Monodisperse hydrophobic spherical CaCO3 particles were prepared by carbonation in the presence of dodecyl dihydrogen phosphate(DDP). The surface property of CaCO3 particles was transformed from hydrophilic to hydrophobic when the mass ratio of DDP to CaCO3 changed from 0 to 2%. X-Ray diffraction(XRD) patterns showed that the crystal form of CaCO3 particles was turned from calcite to aragonite with increasing the dosage of DDP in the reaction. FTIR spectra indicated the existence of the alkyl groups from the DDP in the products. When the mass ratio of DDP to CaCO3 was 2%, the active ratio reached 99% and the contact angle of modified CaCO3 particles was 120.43°. Simultaneously, the effects of the reaction temperature and the dosage of DDP on the morphology and behaviors of aragonite crystals were discussed. When the schematic illustration on the formation process of hydrophobic spherical CaCO3 particles was discussed in the work. When the obtained modified CaCO3 was added into polypropylene(PP), the mechanical properties and processabilities of PP improved greatly.

Key words: Hydrophobicity, Spherical CaCO3, Dodecyl dihydrogen phosphae(DDP), Surface modification

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