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Fe3O4/聚二甲基硅氧烷改性胶原海绵及其油水分离性能

郭晨晨 张云龙 王瑜 丁翠翠 黄六莲 陈礼辉 张敏

郭晨晨, 张云龙, 王瑜, 等. Fe3O4/聚二甲基硅氧烷改性胶原海绵及其油水分离性能[J]. 复合材料学报, 2022, 40(0): 1-12
引用本文: 郭晨晨, 张云龙, 王瑜, 等. Fe3O4/聚二甲基硅氧烷改性胶原海绵及其油水分离性能[J]. 复合材料学报, 2022, 40(0): 1-12
Chenchen GUO, Yunlong ZHANG, Yu WANG, Cuicui DING, liulian HUANG, Lihui CHEN, Min ZHANG. Fe3O4/PDMS modified collagen sponge and its oil-water separation performance[J]. Acta Materiae Compositae Sinica.
Citation: Chenchen GUO, Yunlong ZHANG, Yu WANG, Cuicui DING, liulian HUANG, Lihui CHEN, Min ZHANG. Fe3O4/PDMS modified collagen sponge and its oil-water separation performance[J]. Acta Materiae Compositae Sinica.

Fe3O4/聚二甲基硅氧烷改性胶原海绵及其油水分离性能

基金项目: 国家自然科学基金 (22178056; 22078060)
详细信息
    通讯作者:

    张敏,博士,副教授,硕士生导师,研究方向为生物质高值转化与功能化 E-mail: mzhang@fafu.edu.cn

  • 中图分类号: TB332

Fe3O4/PDMS modified collagen sponge and its oil-water separation performance

  • 摘要: 为发展一种原料丰富、绿色环保、易于在复杂环境中操控使用、循环使用性好的多功能油水分离用海绵材料,采用浸渍法对胶原海绵进行聚二甲基硅氧烷(PDMS)/四氧化三铁(Fe3O4)纳米颗粒复合改性,制备了超疏水胶原基复合海绵(Fe3O4/PDMS-COL),表征了改性后化学结构与微观结构的变化,研究了油水分离性能。通过接触角测量可知:当胶原(COL)浓度为10 mg/mL、PDMS浓度为15%时,复合海绵的水接触角为150.3°。FTIR、XPS、XRD及TG测试结果表明Fe3O4/PDMS与胶原海绵成功发生复合,FE-SEM观察结果表明Fe3O4纳米粒子的加入可有效构造表面粗糙结构。海绵可吸附多种不同类型的油相如苯、正己烷、乙酸乙酯、真空泵油、花生油等,其中对乙酸乙酯的吸附量达47 g/g,且对不同油相的分离效率在99%以上。以苯为吸附物,连续循环使用20次后,海绵的接触角与磁性均未发生明显下降。海绵还可有效分离水包油乳液。在外加磁场作用下实施多种场景下的油水分离实验,Fe3O4/PDMS-COL表现出良好的磁操控性。此外,海绵还具有较好的阻燃性能。利用近红外光热响应性,Fe3O4/PDMS-COL还具备了吸附分离复杂环境中固体状油脂/水体系的潜力。

     

  • 图  1  胶原(COL)和PDMS浓度对海绵水接触角的影响

    Figure  1.  Effects of collagen (COL) and PDMS concentrations on water contact angle of sponges

    图  2  未改性胶原海绵、Fe3O4粉体、Fe3O4-COL海绵和Fe3O4/PDMS-COL复合海绵的FTIR光谱 (a),XPS图谱 (b),XRD图谱 (c) 及TG曲线 (d)

    Figure  2.  FTIR spectra (a), XPS diagrams (b), XRD patterns (c), and TG curves (d) of unmodified collagen sponge, Fe3O4 powder, Fe3O4-COL sponge and Fe3O4/PDMS-COL composite sponge samples

    图  3  Fe3O4/PDMS-COL海绵的FE-SEM图(a)与EDS图(b)

    Figure  3.  FE-SEM images (a) and EDS images (b) of Fe3O4/PDMS-COL sponge

    图  4  Fe3O4/PDMS-COL海绵的磁性表现 (a),对不同液滴的疏水表现 (b),海绵内部的疏水表现 (c),及在极端条件(冷冻、加热)下的疏水表现 (d)

    Figure  4.  Magnetic performance (a), hydrophobic performance toward different droplets (b), hydrophobic performance of the interior (c), and hydrophobic performance under different conditions (freezing, heating) (d) of Fe3O4/PDMS-COL sponge

    图  5  Fe3O4/PDMS-COL海绵分离轻油/水混合物 (a),分离重油/水混合物 (b)

    Figure  5.  Separation of light oil/water mixture (a), separation of heavy oil/water mixture (b) by Fe3O4/PDMS-COL sponge

    图  6  Fe3O4/PDMS-COL海绵在重力作用下的油水分离实验 (a),外部驱动作用下的抽滤实验 (b),外部驱动作用下的连续性油水分离实验 (c)

    Figure  6.  Oil-water separation experiment under gravity (a), filtration experiment under external drive (b), continuous oil-water separation experiment under external drive (c) of Fe3O4/PDMS-COL sponge

    图  7  Fe3O4/PDMS-COL海绵对不同油相的吸附容量 (a),对不同油相的分离效率 (b),苯每次循环利用后的水接触角(c),20次循环利用后的磁性图 (d)

    Figure  7.  Absorption capacity toward different oils (a), adsorption efficiency toward different oils (b), water contact angle after each recycling from benzene (c), magnetic diagram after 20 cycles of recycling (d)

    图  8  O/W型乳液分离实验 (a),乳液分离前后的光学显微镜图像 (b)

    Figure  8.  O/W emulsion separation experiment (a), optical microscope images before and after emulsion separation (b)

    图  9  Fe3O4/PDMS-COL海绵在弯管内的油水分离实验 (a),图像显示在U形管中水层下方的重油的去除情况 (b)。该管中包含三相液体,分别为:正己烷(上层,透明,轻油)、水(中层,蓝色)和三氯甲烷(下层,红色,重油)

    Figure  9.  Oil-water separation experiment of Fe3O4/PDMS-COL sponge on curved track(a), the image shows the removal of heavy oil under the water layer in the U-shaped tube (b). The tube contains three-phase liquids, namely n-hexane (upper layer, transparent, light oil) water (middle layer, blue) and chloroform (lower layer, red, heavy oil)

    图  10  Fe3O4/PDMS-COL海绵的阻燃效果 (a,b),燃烧后海绵的外观状态 (c) 及疏水性 (d)

    Figure  10.  Flame retardant effect of Fe3O4/PDMS-COL sponge (a,b), appearance status (c) and hydrophobicity (d) of Fe3O4/PDMS-COL sponge after combustion

    图  11  近红外光照射使海绵升温,融化固体油脂实现油水分离

    Figure  11.  Fe3O4/PDMS-COL sponge was heated up by near-infrared radiation, and then the solid grease was melted to achieve oil-water separation

    表  1  不同聚二甲基硅氧烷(PDMS)与胶原浓度下海绵的接触角

    Table  1.   Contact angles of sponges at different polydimethylsiloxane (PDMS) and collagen concentrations

    PDMS
    concentration/%
    Contact
    angle/(°)
    Collagen
    concentration/
    (mg·mL−1)
    Contact
    angle/(°)
    5114.7±0.23109.0±0.3
    10120.1±0.56114.6±0.5
    15150.3±0.610150.3±0.5
    20149.0±0.315140.3±0.4
    30150.5±0.320125.7±0.7
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-02-28
  • 录用日期:  2022-04-23
  • 修回日期:  2022-04-16
  • 网络出版日期:  2022-05-13

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