温度响应性双面纳米纤维的制备和性能

doi:10.11901/1005.3093.2021.637

材料研究学报

2023, Vol. 37

Issue (4): 248-256 DOI: 10.11901/1005.3093.2021.637

研究论文

本期目录 | 过刊浏览

温度响应性双面纳米纤维的制备和性能

张锦中¹, 刘晓云²(

), 杨健茂², 周剑锋², 查刘生¹(

)

^1.纤维材料改性国家重点实验室东华大学材料科学与工程学院上海 201620
^2.东华大学分析测试中心上海 201620

Preparation and Properties of Temperature-Responsive Janus Nanofibers

ZHANG Jinzhong¹, LIU Xiaoyun²(

), YANG Jianmao², ZHOU Jianfeng², ZHA Liusheng¹(

)

^1.State Key Laboratory of Fiber Material Modification, School of Materials Science and Engineering, Donghua University, Shanghai 201620, China
^2.Analysis and Testing Center, Donghua University, Shanghai 201620, China

引用本文:

张锦中, 刘晓云, 杨健茂, 周剑锋, 查刘生. 温度响应性双面纳米纤维的制备和性能[J]. 材料研究学报, 2023, 37(4): 248-256.
Jinzhong ZHANG, Xiaoyun LIU, Jianmao YANG, Jianfeng ZHOU, Liusheng ZHA. Preparation and Properties of Temperature-Responsive Janus Nanofibers[J]. Chinese Journal of Materials Research, 2023, 37(4): 248-256.

全文: PDF(10069 KB) HTML

摘要:

使用N-异丙基丙烯酰胺和丙烯酰氧基二苯甲酮共聚合成的温度响应性聚合物和以用甲基丙烯酸缩水甘油酯改性的聚乙烯醇为成纤聚合物、以水为溶剂，配制纺丝液并将并列静电纺丝和紫外光辐照相结合制备出升温可卷曲的温度响应性双面纳米纤维。用扫描电镜和透射电镜均观察到这种纳米纤维具有双面结构，用核磁共振波谱仪证实用紫外光辐照可使双面纳米纤维中形成交联结构。研究了并列静电纺丝的工艺条件对双面纳米纤维的产率和平均直径的影响。结果表明，在两种纺丝液的流速不超过0.3 mL/h、纺丝电压不超过22 kV的条件下双面纳米纤维的产率高于90%，改变接收距离可在一定范围内调节双面纳米纤维的平均直径。这种双面纳米纤维在水中具有良好的稳定性，其中可水溶的聚合物含量(质量分数)低于2%。当水介质温度从25℃升高到35℃时，这种纳米纤维从伸展形态转变为卷曲的形态。这种对温度的响应性具有可逆性。

关键词 ：复合材料, 双面纳米纤维, 温度响应性, 并列静电纺丝, 紫外光辐照, 升温可卷曲

Abstract：

A temperature-responsive polymer was synthesized by co-polymerization of N-isopropylacrylamide and acryloyloxybenzophenone. Meanwhile, poly(vinyl alcohol) (PVA) was modified by glycidyl methacrylate. Taking the synthesized polymer and the modified PVA as fiber-forming precursor reagents, of which spinning solutions were then prepared, respectively as the raw materials for producing fiber. Finally, the temperature-responsive Janus nanofibers were fabricated by side-by-side electrospinning under UV irradiation. Scanning electron microscope and transmission electron microscope observation results show that the prepared nanofibers have double-faced structure. The results of nuclear magnetic resonance spectroscopy reveal that the applied ultraviolet irradiation facilitates the formation of crosslinking structure for the double-faced nanofibers. The effect of side-by-side electrospinning process conditions on the yield and average diameter of the Janus nanofibers was investigated, it was found that the yield of the Janus nanofibers can exceed 90% when the flow rates of the two spinning solutions are less than 0.3 mL/h and the spinning voltage is lower than 22 kV. In addition, the average diameter of the Janus nanofibers can be adjusted by changing the receiving distance within a certain range. The prepared Janus nanofibers with a water-soluble polymer content (mass fraction) of less than 2% have good stability in water. When the temperature of the aqueous medium increased from 25℃ to 35℃, the prepared Janus nanofibers can transform from a stretching configuration to a curling one, and this temperature-responsiveness is reversible.

Key words： composite Janus nanofibers side-by-side electrospinning process temperature-responsiveness curling upon temperature rising ultraviolet light radiation

收稿日期: 2021-11-15

ZTFLH:

TQ430.50

基金资助:国家自然科学基金(51373030);国家自然科学基金(51503033)

作者简介: 张锦中，男，1994年生，博士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2021.637 或 https://www.cjmr.org/CN/Y2023/V37/I4/248

图1 制备MPVA/PNA双面纳米纤维的装置示意图

图2 MPVA的1H NMR谱和MPVA的13C NMR谱

图3 PNA-2和PNIPAM的1H NMR谱、三批PNA的水溶液在500 nm处的吸光度与温度的关系(A-T)及其微分曲线(dA/dT-T)(插图)

表1 三批PNA分子链中ABP/NIPAM摩尔百分比和LCST测试结果

图4 用并列静电纺丝制备的MPVA/PNA双面纳米纤维的外观照片、MPVA/PNA双面纳米纤维的SEM照片、MPVA/PNA双面纳米纤维的TEM照片以及MPVA/PNA双面纳米纤维的1H NMR谱

表2 用不同并列静电纺丝工艺制备的MPVA/PNA双面纳米纤维的产率和平均直径

图5 在不同并列静电纺丝工艺条件下制备的MPVA/PNA双面纳米纤维的SEM照片

图6 样品JNF-8在水中浸泡6 h干燥后的SEM照片和浸在水中的样品JNF-8以300 r/min频率振荡2 h干燥后的SEM照片

图7 在温度不同的水介质中MPVA/PNA双面纳米纤维(JNF-8)的显微照片

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