Environmental issues are being addressed more intensely in today’s and future society. Concerning to this, the term ‘solvent-free’ conjures up a wide variety of innovations amongst the scientific community. Thus, it is necessary to develop environmentally benign green approaches in design engineering. In this communication, we reported the fabrication of solvent-free green polyvinyl chloride (gPVC) gel based electroactive varifocal micro-lens, which can dynamically tune its focal length under the applied input voltage. To develop gPVC gels, PVC powder was thermally treated by mixing stoichiometric quantity of an eco-friendly green plasticizer, acetyl tributyl citrate (ATBC). To obtain better control over the tunable optical properties, various gPVC gels were characterized and optimized gel was investigated. Consequently, gPVC gel with ATBC to PVC (15:1) ratio have showed an outstanding performance. Under the electrical stimulation, the focal length of the proposed lens has been ...

中文翻译：

---

无溶剂绿色PVC凝胶变焦微透镜的研制

在当今和未来的社会中，环境问题得到了越来越多的关注。关于这一点，“无溶剂”一词在科学界引起了各种各样的创新。因此，有必要在设计工程中开发对环境无害的绿色方法。在此交流中，我们报道了基于无溶剂绿色聚氯乙烯（gPVC）凝胶的电活性变焦微透镜的制造，该透镜可以在施加的输入电压下动态调整其焦距。为了开发gPVC凝胶，通过混合化学计量的环保型绿色增塑剂柠檬酸乙酰三丁酯（ATBC）对PVC粉末进行热处理。为了更好地控制可调光学性能，对各种gPVC凝胶进行了表征，并研究了优化的凝胶。所以，具有ATBC与PVC（15：1）比例的gPVC凝胶表现出出色的性能。在电刺激下，建议的镜头焦距为...