Ion gels have been obtained by crystallization of polylactide (PLA) in an ionic liquid. The modulus of the resulted ion gels is increased with PLA content in the ionic liquid, whereas ionic conductivity follows an opposite tendency. Isolated spheres, caused by PLA crystallization, are responsible for low modulus in the ion gels with low PLA content. By adding a nucleating agent isolated spheres are transformed into interconnected network due to the increased nucleation density during PLA crystallization in the ionic liquid. It in turn significantly enhances the modulus by more than three orders of magnitude, while ionic conductivity remains nearly intact. (C) 2016 Elsevier Ltd. All rights reserved.