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Regulable Mixed-Solvent-Induced Phase Separation in Hydrogels for Information Encryption
Small ( IF 13.0 ) Pub Date : 2022-11-04 , DOI: 10.1002/smll.202205359
Min Li 1 , Honglang Lu 1 , Xiaoyu Wang 1 , Zhisen Wang 1 , Menghan Pi 1 , Wei Cui 1 , Rong Ran 1
Small ( IF 13.0 ) Pub Date : 2022-11-04 , DOI: 10.1002/smll.202205359
Min Li 1 , Honglang Lu 1 , Xiaoyu Wang 1 , Zhisen Wang 1 , Menghan Pi 1 , Wei Cui 1 , Rong Ran 1
Affiliation
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The rapid progress of information technology is accompanied by plenty of information embezzlement and forgery, but developing advanced encryption technologies to ensure information security remains challenging. Phase separation commonly leads to a dramatic change in the transmittance of hydrophilic polymer networks, which is a potential method for information security but is often neglected. Here, taking the polyacrylamide (PAAm) hydrogel system as a typical example, facilely adjustable information encryption and decryption via its regulable phase separation process in ethanol/water mixed solvent, are reported. By controlling the osmotic pressure of the external and internal environment, it is demonstrated that the diffusion coefficient during deswelling and reswelling, as well as the corresponding change of transmittance of the gel, can be well controlled. Relatively high osmotic pressure leads to rapid phase separation of the initial gel but slow phase remixing of the phase-separated gel, opening the opportunity of applying the gel as a reversible information encryption device. As proof-of-concept demonstrations, several stable and reversible information encryption and decryption systems by making use of the phase separation process of the gels are designed, which are expected to inspire the development of next-generation soft devices for information technology.
中文翻译:
用于信息加密的水凝胶中可调节的混合溶剂诱导相分离
信息技术的快速进步伴随着大量的信息盗用和伪造,但开发先进的加密技术以确保信息安全仍然具有挑战性。相分离通常会导致亲水性聚合物网络的透射率发生显着变化,这是一种潜在的信息安全方法,但往往被忽视。在此,以聚丙烯酰胺 (PAAm) 水凝胶系统为例,报道了通过其在乙醇/水混合溶剂中的可调节相分离过程轻松调节的信息加密和解密。通过控制内外环境的渗透压,证明了消溶胀和再溶胀过程中的扩散系数,以及凝胶透光率的相应变化,可以很好地控制。相对较高的渗透压导致初始凝胶的快速相分离,但相分离凝胶的相再混合缓慢,这为凝胶作为可逆信息加密设备的应用提供了机会。作为概念验证演示,利用凝胶的相分离过程设计了几种稳定可逆的信息加密和解密系统,有望激发下一代信息技术软设备的发展。
更新日期:2022-11-04
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
用于信息加密的水凝胶中可调节的混合溶剂诱导相分离
信息技术的快速进步伴随着大量的信息盗用和伪造,但开发先进的加密技术以确保信息安全仍然具有挑战性。相分离通常会导致亲水性聚合物网络的透射率发生显着变化,这是一种潜在的信息安全方法,但往往被忽视。在此,以聚丙烯酰胺 (PAAm) 水凝胶系统为例,报道了通过其在乙醇/水混合溶剂中的可调节相分离过程轻松调节的信息加密和解密。通过控制内外环境的渗透压,证明了消溶胀和再溶胀过程中的扩散系数,以及凝胶透光率的相应变化,可以很好地控制。相对较高的渗透压导致初始凝胶的快速相分离,但相分离凝胶的相再混合缓慢,这为凝胶作为可逆信息加密设备的应用提供了机会。作为概念验证演示,利用凝胶的相分离过程设计了几种稳定可逆的信息加密和解密系统,有望激发下一代信息技术软设备的发展。