Additive Manufacturing (AM), commonly known as 3D printing, over three decades, emphasizing its transformative ability to create intricate structures in a single unit. The growing popularity of AM is attributed to continuous technological advancements and its application across diverse materials, responding to the demand for personalized products, shorter development cycles, sustainability, and new business models. Despite AM's strengths, the limitations of materials used in the process prompt the integration of intelligent materials, particularly in the emerging field of 4D printing. The focus shifts to intelligent materials, also known as smart materials, which respond to external stimuli, offering controlled transformations or shape changes post-fabrication. The narrative explores programmable matter, or 4D printing, where materials exhibit time-induced dynamics, introducing a fourth dimension to AM. Intelligent materials such as piezoelectric, shapememory, giant magnetostrictive, and nanomaterials extend the scope of applications from sensors to artificial muscles. The review discusses diverse 3D printing technologies in conjunction with intelligent materials, envisioning a future where these materials redefine additive manufacturing landscapes. AM technologies showcase their compatibility with intelligent materials and their potential to revolutionize various industries. The compatibility of intelligent materials with these technologies opens avenues for creating complex, functional, and customized objects with improved mechanical, thermal, and electrical qualities. 4D printing and the fusion of intelligent materials with bioinspired design principles offer a glimpse into the future of adaptive and functionally superior 3D-printed objects.

Superadsorbent hydrogels have become a viable solution to the urgent problem of industrial wastewater contamination. This paper offers a thorough analysis of the most recent advancements in superadsorbent hydrogels, highlighting their potential to reduce pollution from industrial waste and support environmental preservation. The review begins with an explanation of the basic properties and principles of superadsorbent hydrogels, with a focus on their exceptional ability to swell with water. The story then flows into a thorough analysis of wastewater treatment, explaining how superadsorbent hydrogels interact with pollutants. Synthesis processes using natural, synthetic, and hybrid materials are examined to reveal the many strategies used to produce these hydrogels. In addition, the study explores the environmental effects of using superadsorbent hydrogels in wastewater treatment, assessing possible effects on soil and aquatic environments. This research highlights the revolutionary potential of superadsorbent hydrogels in improving industrial wastewater treatment methods while also protecting the environment.