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甘油聚合度对纤维素纳米晶体复合虹彩薄膜结构和湿度响应性能的影响

安邦 孙文野 李光盈 陈芋 马春慧 罗沙 徐明聪 李伟 刘守新

安邦, 孙文野, 李光盈, 等. 甘油聚合度对纤维素纳米晶体复合虹彩薄膜结构和湿度响应性能的影响[J]. 复合材料学报, 2024, 42(0): 1-10.
引用本文: 安邦, 孙文野, 李光盈, 等. 甘油聚合度对纤维素纳米晶体复合虹彩薄膜结构和湿度响应性能的影响[J]. 复合材料学报, 2024, 42(0): 1-10.
AN Bang, SUN Wenye, LI Guangying, et al. Effect of glycerol polymerization degree on the structure and humidity response of cellulose nanocrystals composite iridescent films[J]. Acta Materiae Compositae Sinica.
Citation: AN Bang, SUN Wenye, LI Guangying, et al. Effect of glycerol polymerization degree on the structure and humidity response of cellulose nanocrystals composite iridescent films[J]. Acta Materiae Compositae Sinica.

甘油聚合度对纤维素纳米晶体复合虹彩薄膜结构和湿度响应性能的影响

基金项目: 国家自然科学基金资助项目(32071719);大学生创新训练计划项目(202210225089)
详细信息
    通讯作者:

    李伟,博士,教授,博士生导师,研究方向为纤维素纳米晶体与光学器件 E-mail: liwei820927@nefu.edu.cn

    刘守新,博士,教授,博士生导师,研究方向为生物质材料的制备与应用 E-mail: liushouxin@nefu.edu.cn

Effect of glycerol polymerization degree on the structure and humidity response of cellulose nanocrystals composite iridescent films

Funds: National Natural Science Foundation of China (32071719); College Students' Innovative Entrepreneurial Training Plan Program (202210225089)
  • 摘要: 为了探究添加物聚合度对纤维素纳米晶体(CNC)复合虹彩膜的影响,利用不同聚合度的甘油与CNC通过蒸发诱导自组装的方法制备了CNC/(聚)甘油复合虹彩薄膜。系统地研究了甘油聚合度对CNC复合虹彩膜结构色、力学性能和湿度响应能力的影响。结果表明,随甘油聚合度的增加,复合膜中CNC手性向列相结构的螺距变小,复合虹彩膜的颜色蓝移,最大反射波长降低了最多约40 nm。甘油的加入显著提高了复合虹彩膜的湿度响应能力,甘油聚合度越低,复合虹彩膜湿度响应能力越强,在高湿度下反射波长越大。其中甘油添加量为20wt%的虹彩膜在相对湿度为98%的环境中发生了170 nm的红移,膜颜色由青色变为红色;相较于纯CNC膜,(聚)甘油复合虹彩膜的力学性能显著提升。对于复合虹彩膜,随(聚)甘油分子链增长,虹彩膜的断裂伸长率和抗拉强度最大分别提升了1.58倍和2.48倍。

     

  • 图  1  (a) CNC/G, (b) CNC/3G, (c) CNC/6G和(d) CNC/10G复合彩虹膜的照片和紫外-可见反射光谱。(e) CNC/G40、CNC/3G40、CNC/ 6G40、CNC/10G40的照片和紫外-可见反射光谱。(f) CNC/G、(g) CNC/3G、(h) CNC/6G和(i) CNC/10G的圆二色(CD)光谱。

    Figure  1.  Digital photographs and UV-Vis reflection spectra of the (a) CNC/G, (b) CNC/3G, (c) CNC/6G and (d) CNC/10G composite iridescence films. Digital photographs and UV-Vis reflection spectra of the composite iridescence films of (e) CNC/G40, CNC/3G40, CNC/6G40 and CNC/10G40. Circular dichroism (CD) spectra of (f) CNC/G, (g) CNC/3G, (h) CNC/6G and (i) CNC/10G.

    图  2  CNC/G10、CNC/G20、CNC/G30、CNC/G40的POM图; CNC/10G10、CNC/10G20、CNC/10G30和CNC/10G40的POM图

    Figure  2.  POM image of CNC/G10, CNC/G20, CNC/G30, CNC/G40, CNC/10G10, CNC/10G20, CNC/10G30 and CNC/10G40

    图  3  (a) CNC膜的SEM侧视图;(b) CNC膜的SEM截面图;(c) CNC/G10、(d) CNC/G20、(e) CNC/G30、(f) CNC/G40的SEM侧视图;(g) CNC/10G10、(h) CNC/10G20、(i) CNC/10G30、(j) CNC/10G40的SEM侧视图

    Figure  3.  (a) side view SEM image of CNC; (b) cross section SEM image of CNC. Side view of SEM image of (c) CNC/G10, (d) CNC/G20, (e) CNC/G30 and (f) CNC/G40; Side view of SEM image of (g) CNC/10G10, (h) CNC/10G20, (i) CNC/10G30 and (j) CNC/10G40

    图  4  (a) CNC、CNC/G10、CNC/G20、CNC/G20和CNC/G30复合膜的FT-IR光谱。(b) CNC、CNC/G40、CNC/3G40、CNC/6G40和CNC/10G40复合膜的FT-IR光谱。

    Figure  4.  (a) FT-IR spectrum of the CNC, CNC/G10, CNC/G20,CNC/G20 and CNC/G30 films. (b) FT-IR spectrum of the CNC, CNC/G40, CNC/3G40,CNC/6G40 and CNC/10G40 films.

    图  5  (a) CNC复合膜的应力应变曲线。(b) CNC复合膜的抗拉强度和断裂伸长率。 (c) CNC、CNC/G10、CNC/G20、CNC/G20和CNC/G30复合膜的XRD谱图。(d) CNC、CNC/G40、CNC/3G40、CNC/6G40和CNC/10G40复合膜的XRD谱图。

    Figure  5.  (a) Stress–strain curves of the CNC composite films. (b) Tensile strength and strain to failure of the CNC composite films. (c) XRD spectra of CNC, CNC/G10, CNC/G20,CNC/G20 and CNC/G30 films. (d) XRD spectra of the CNC, CNC/G40, CNC/3G40,CNC/6G40 and CNC/10G40 films.

    图  6  (a)不同相对湿度下CNC/G20、CNC/3G20、CNC/6G20和CNC/10G20薄膜的可逆结构颜色变化。(b) 甘油脱水缩合形成聚甘油示意图

    Figure  6.  (a)Reversible structural color change of the CNC/G20, CNC/3G20, CNC/6G20 and CNC/10G20 films under different RH. (b) Schematic diagram of the dehydrated condensation of glycerol to form polyglycerol

    图  7  在不同湿度下的(a) CNC, (b) CNC/G20, (c) CNC/3G20, (d) CNC/6G20 以及 (e) CNC/10G20 的紫外-可见反射光谱。(f)不同CNC复合膜在相对湿度为35%下的紫外-可见反射光谱。

    Figure  7.  UV-vis reflection spectra of the (a) CNC, (b) CNC/G20, (c) CNC/3G20, (d) CNC/6G20 and (e) CNC/10G20 films under different RH. (f) UV-vis reflection spectra of the different CNC composite films under RH 35%.

    表  1  复合膜的最大反射波长(λmax)

    Table  1.   the maximum reflective wavelength (λmax) of composite films

    Sample λmax (nm) Sample λmax (nm)
    CNC 411 CNC/G30 530
    CNC/G10 442 CNC/3G30 521
    CNC/3G10 432 CNC/6G30 516
    CNC/6G10 437 CNC/10G30 501
    CNC/10G10 434 CNC/G40 583
    CNC/G20 473 CNC/3G40 561
    CNC/3G20 461 CNC/6G40 552
    CNC/6G20 466 CNC/10G40 542
    CNC/10G20 460
    下载: 导出CSV

    表  2  复合膜的结晶度(Cr)

    Table  2.   The crystallinity (Cr) of composite films

    Sample Cr (%) Sample Cr (%)
    CNC 87.8 CNC/6G10 90.2
    CNC/G10 89.6 CNC/6G20 90.1
    CNC/G20 89.4 CNC/6G30 89.3
    CNC/G30 88.7 CNC/6G40 84.2
    CNC/G40 86.0 CNC/10G10 89.9
    CNC/3G10 91.0 CNC/10G20 90.7
    CNC/3G20 89.9 CNC/10G30 77.1
    CNC/3G30 89.0 CNC/10G40 72.4
    CNC/3G40 86.1
    下载: 导出CSV
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  • 收稿日期:  2024-01-12
  • 录用日期:  2024-04-17
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