Surface modification of cellulose is critical for advancing its utility across a wide range of applications, particularly in the growing fields of green electronics and sustainable packaging. This chapter focuses on physical modification techniques as sustainable alternatives to chemical approaches, aiming to preserve the inherent properties of cellulose while enhancing its surface characteristics. Key physical methods explored include corona surface treatment, plasma treatment, UV treatment, and laser treatment. Corona surface treatment enhances polymer adhesion by exposing materials to electrical discharge, creating reactive species like ozone and atomic oxygen. These species introduce polar functional groups, increasing surface energy and wettability. This technique is widely used due to its cost-effectiveness and minimal environmental impact, though its effects are temporary and may degrade over time. Plasma treatment, in contrast, offers nanoscale precision by utilizing ionized gases under low pressure, though it comes with higher costs and complexity. UV treatment improves surface wettability and adhesion using UV light, avoiding chemical waste but requiring careful control of exposure conditions. Laser treatment, characterized by its high precision, is ideal for creating intricate patterns but requires expensive equipment and expertise. The growing emphasis on sustainable production is driving innovation in these physical modification techniques, which minimize environmental impact while expanding the utility of cellulose in advanced applications. This chapter provides an overview of these methods, assessing their effectiveness, limitations, and potential use of cellulose in advanced and sustainable technologies.