Preparation and Properties of Spiropyran-based Polydimethylsiloxane with Photo-responsive Wettability

Cong-cong Cui; Guo-jie Liu; He Gao; Min Wang; Jun Gao

doi:10.11777/j.issn1000-3304.2021.21112

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Preparation and Properties of Spiropyran-based Polydimethylsiloxane with Photo-responsive Wettability

Research Article | 更新时间：2023-05-22

- Preparation and Properties of Spiropyran-based Polydimethylsiloxane with Photo-responsive Wettability
- ACTA POLYMERICA SINICA Vol. 52, Issue 12, Pages: 1568-1577(2021)
- 作者机构：
  
  四川大学化学工程学院成都 610065
- 作者简介：
  
  Jun Gao, E-mail: gjun@scu.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2021.21112
  CLC：
- Published：20 December 2021，
  
  Published Online：07 September 2021，
  
  Received：19 April 2021，
  
  Revised：17 June 2021，
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崔聪聪,刘郭洁,高鹤等.螺吡喃基光响应可逆润湿性聚二甲基硅氧烷薄膜的制备及其性能研究[J].高分子学报,2021,52(12):1568-1577.

Cui Cong-cong,Liu Guo-jie,Gao He,et al.Preparation and Properties of Spiropyran-based Polydimethylsiloxane with Photo-responsive Wettability[J].ACTA POLYMERICA SINICA,2021,52(12):1568-1577.
崔聪聪,刘郭洁,高鹤等.螺吡喃基光响应可逆润湿性聚二甲基硅氧烷薄膜的制备及其性能研究[J].高分子学报,2021,52(12):1568-1577. DOI： 10.11777/j.issn1000-3304.2021.21112.

Cui Cong-cong,Liu Guo-jie,Gao He,et al.Preparation and Properties of Spiropyran-based Polydimethylsiloxane with Photo-responsive Wettability[J].ACTA POLYMERICA SINICA,2021,52(12):1568-1577. DOI： 10.11777/j.issn1000-3304.2021.21112.

摘要

通过自由基共聚合的方法将光敏单体螺吡喃(SPMA)接枝在聚二甲基硅氧烷(PDMS)表面，制备了一种光响应可逆切换润湿性薄膜，并对其制备工艺进行了优化. 该薄膜对环境光照敏感，在可见光条件下为无色透明状态，经365 nm紫外光激发15 s后，薄膜表面的SPMA响应光刺激后立即变为深紫色，并伴随着极性的变化，最终导致薄膜表现出润湿性转变. 将薄膜重新放置在可见光或黑暗条件下时，其润湿性能又可逆恢复到初始状态. 对薄膜进行润湿性能测试后发现，紫外光辐照前后的接触角差值最高可达38.5°. 这一显著的可逆切换润湿性能赋予了该光响应薄膜在生物医用材料、细胞培养和无酶化脱附、智能窗涂层等领域的潜在应用价值. 另外，经过多次紫外-可见光交替循环辐照之后该薄膜依然具有良好的光响应性及可逆润湿性能.

Abstract

In recent years

smart materials have attracted much attention. The active switch of smart materials can be turned on or off reversibly in response to different external stimuli. Inspired by previous studies

we have prepared a photo-responsive smart wetting material with spiropyran as the active switch group. The photosensitive monomer 3-(3'

3'-dimethyl-6-nitrospiro-(chromene-2

2'-indolin)-1'-yl) propyl methacrylate (SPMA) was grafted on the surface of polydimethylsiloxane (PDMS) by free radical copolymerization to prepare a photo-responsive film named SPMA-

-PDMS. The film is sensitive to ambient light

and it is colorless and transparent under visible light

while after being excited by 365 nm ultraviolet light for 15 s

it immediately turn purplish

accompanied by the change of polarity

resulting in the wettability transition of the film. When SPMA-

-PDMS is exposed to visible light or darkness

the wettability of the film can be restored to its initial state. The difference of contact angle before and after ultraviolet irradiation can reach 38.5°. This remarkable performance of reversible switchable wetting gives SPMA-

-PDMS potential application value in the fields of biomedical materials

cell culture

non-enzymatic desorption

smart window coating and so on. In addition

after several alternating UV-visible light cycles

SPMA-

-PDMS still possesses good photo response and reversible wetting performances.

关键词

光响应螺吡喃可逆润湿性聚二甲基硅氧烷

Keywords

Light responseSpiropyranReversible wettabilityPolydimethylsiloxane

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