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长链疏水改性苯丙共聚物乳液的合成及固沙性能

曾湘楚 张光华 武哲

曾湘楚, 张光华, 武哲. 长链疏水改性苯丙共聚物乳液的合成及固沙性能[J]. 华南师范大学学报(自然科学版), 2021, 53(6): 34-42. doi: 10.6054/j.jscnun.2021090
引用本文: 曾湘楚, 张光华, 武哲. 长链疏水改性苯丙共聚物乳液的合成及固沙性能[J]. 华南师范大学学报(自然科学版), 2021, 53(6): 34-42. doi: 10.6054/j.jscnun.2021090
ZENG Xiangchu, ZHANG Guanghua, WU Zhe. The Synthesis and Sand Solidification Properties of Long Chain Hydrophobic Modified Styrene-acrylic Copolymer Emulsion[J]. Journal of South China normal University (Natural Science Edition), 2021, 53(6): 34-42. doi: 10.6054/j.jscnun.2021090
Citation: ZENG Xiangchu, ZHANG Guanghua, WU Zhe. The Synthesis and Sand Solidification Properties of Long Chain Hydrophobic Modified Styrene-acrylic Copolymer Emulsion[J]. Journal of South China normal University (Natural Science Edition), 2021, 53(6): 34-42. doi: 10.6054/j.jscnun.2021090

长链疏水改性苯丙共聚物乳液的合成及固沙性能

doi: 10.6054/j.jscnun.2021090
基金项目: 

国家自然科学基金项目 31670596

陕西省自然科学基础研究计划项目 2020GY-232

详细信息
    通讯作者:

    张光华,Email: zhanggh@sust.edu.cn

  • 中图分类号: O631

The Synthesis and Sand Solidification Properties of Long Chain Hydrophobic Modified Styrene-acrylic Copolymer Emulsion

  • 摘要: 以苯乙烯(St)和甲基丙烯酸甲酯(MMA)为硬单体,丙烯酸丁酯(BA)、丙烯酸(AA)和丙烯酸羟乙酯(HEA)为软单体,丙烯酸十八酯(SA)为功能单体,过硫酸钾(KPS)为引发剂,聚氧乙烯辛基苯酚醚-10(OP-10)和十二烷基硫酸钠(SDS)为复合乳化剂,采用种子乳液聚合,制备了长链疏水改性苯丙共聚物乳液,采用氢核磁共振(1H NMR)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、热重分析(TGA)等对共聚物进行表征并研究其固沙性能. 结果表明:当乳化剂SDS与OP-10的质量比为1 ∶ 1,亲油亲水平衡值(HLB)为27.50时,乳液最稳定,平均粒径为1.423 μm,乳液分散指数(TSI)为0.413. 丙烯酸十八酯质量分数为3%(占单体总质量的比例)时,聚合物热分解温度约为340 ℃,胶膜硬度达到3 H,吸水率降低至3.25%,水接触角提高至78.6°. 改性苯丙共聚物乳液作为固沙剂使用,当固沙剂固含量(质量分数)为15%、添加量为5 g/cm3时,沙柱的无侧限抗压强度为118.32 kPa、内聚强度为16.53 kPa、内摩擦角为8.68°,沙盘的相对冲刷保留率为98.2%,相对风蚀保留率为100%.
  • 图  1  长链疏水改性苯丙共聚物乳液的反应式

    Figure  1.  The reaction formula of the long chain hydrophobic modified styrene-acrylic copolymer emulsion

    图  2  共聚物乳液的TEM图

    Figure  2.  The TEM images of the copolymer emulsion

    图  3  共聚物胶膜的SEM图

    Figure  3.  The SEM images of the copolymer film

    图  4  共聚物的核磁共振氢谱

    Figure  4.  The 1H NMR spectrum of the copolymer

    图  5  共聚物的凝胶渗透色谱

    Figure  5.  The GPC spectrum of the copolymer

    图  6  共聚物乳液的粒径分布与分散指数

    Figure  6.  The particle size distribution and TSI of copolymer emulsion

    图  7  SA质量分数对共聚物胶膜热稳定性的影响

    Figure  7.  The effect of the amount of SA on the thermal stability of copolymer film

    图  8  SA质量分数对共聚物胶膜吸水率和接触角的影响

    Figure  8.  The effect of the amount of SA on water adsorption and contact angle of copolymer film

    图  9  SA质量分数对共聚物胶膜力学性能的影响

    Figure  9.  The effect of the amount of SA on the mechanical properties of copolymer film

    图  10  固沙剂添加量对试样无侧限抗压强度的影响

    Figure  10.  The effect of the dosage of sand solidification agent on the unconfined compressive strength of sample

    图  11  固沙剂添加量对试样剪切强度的影响

    Figure  11.  The effect of the dosage of sand solidification agent on the shear strength of sample

    图  12  固沙剂添加量对试样相对抗冲蚀率的影响

    Figure  12.  The effect of the dosage of sand solidification agent on the relative resistance to erosion rate of sample

    图  13  固沙剂添加量对试样相对抗风蚀率的影响

    Figure  13.  The effect of the dosage of sand solidification agent on the relative resistance to wind erosion rate of sample

    图  14  固沙剂的固沙机理

    Figure  14.  The sand solidification mechanism of sand solidification agent

    表  1  乳化剂中SDS的质量分数对预乳液稳定性的影响

    Table  1.   The effect of mass fraction of SDS in of emulsifiers on pre-emulsion stability

    w(SDS)/% HLB 物理性状
    71.43 21.43 快速分层,上白下清
    66.67 22.67 20 min左右分层
    60.00 24.40 30 min后底部有沉淀
    50.00 27.50 稳定的牛奶状乳液
    40.00 29.60 2 h左右分层
    33.33 31.33 快速分层,上清下白
    28.57 32.57 乳液发生团聚
    注:w(SDS)定义为0.3 g复合乳化剂(OP-10和SDS)中SDS的质量分数.
    下载: 导出CSV

    表  2  共聚物乳液固沙剂和胶膜的性能分析

    Table  2.   The performance analysis of the copolymer emulsion sand solidification agent and the copolymer film

    共聚物固沙剂乳液 测试结果 共聚物胶膜 测试结果
    黏度/(mPa·s) 30 膜硬度/H 3
    颜色 白色 吸水率/% 3.25
    乳液状态 均匀分散 水接触角/(°) 78.6
    对沙子的渗透性 快速渗透 拉伸强度/MPa 0.72
    30 ℃下挥发时间/h 3 热分解温度/℃ 340
    下载: 导出CSV
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  • 收稿日期:  2021-07-09
  • 网络出版日期:  2022-01-10
  • 刊出日期:  2021-12-25

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