Saiful Huda, Widi Astuti, Harianingsih Harianingsih, Megawati Megawati, Prima Astuti Handayani
Indonesia is a strategic maritime country, especially in terms of trade and economy. The most vital defense is Indonesian waters in the form of shipping by the Indonesian Navy. The support is in the form of nautical chart paper which is strong and waterproof. Natural paper reinforcement needs to be added because synthetic materials contain monomer groups, can damage the environment and are difficult to grade. Examples of natural agents are carrageenan and bentonite which work to form hydrogen bonds with cellulose fibers, thereby increasing the strength of paper. The research aims to study the effect of carrageenan and bentonite on opacity, tearing, tensile, wet index, and Cobb. The highest opacity was 100.2% in carrageenan with a dose of 14%. The highest tearing was in the mixed agent, amounting to 745.87 mN at a dose of 14%. The highest tensile dose of 14% was 1.58 kgf/15mm. The highest wet index dose is 14%, which is 2.55% of the mixed agent. The best Cobb for mixed agents with a dose of 14% was 67.09 g/m2. In conclusion, carrageenan and bentonite have potential as wet strength agents in making nautical chart paper. © The Authors, published by EDP Sciences.
Department of Chemical Engineering, Faculty of Engineering, Universitas Negeri Semarang, Sekaran, Gunungpati, Semarang, Indonesia
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