AI Article Synopsis
- Most cellulose products are water-sensitive due to many hydroxyl groups, making them less durable in wet conditions.
- The study modified microfibrillated cellulose (MFC) using a combination of a chemical agent (APTES) and mechanical milling, allowing it to become both fibrillated and hydrophobic.
- The resulting cellulose films maintained their original structure while showing increased water resistance, with a high contact angle of 133.2°, improved thermal stability, and enhanced mechanical properties.
Article Abstract
Most cellulose products lack water resistance due to the existence of abundant hydroxyl groups. In this work, microfibrillated cellulose (MFC) was modified via 3-aminopropyltriethoxysilane (APTES)-assisted ball milling. Under the synergism between high-energy mechanical force field and APTES-modification, the fibrillation and hydrophobization of MFC were achieved simultaneously. Free-standing translucent cellulose films made of modified MFC were fabricated. The original crystal form of cellulose is maintained. The hydrophobicity of cellulose film markedly increases and the water contact angle goes up to 133.2 ± 3.4°, which might be ascribed to the combined effects of APTES-modification and rough film surface. In addition, the thermostability and mechanical properties of cellulose film are also improved via mechanochemical modification. This work provides a novel one-step fibrillation-hydrophobization method for cellulose.
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| http://dx.doi.org/10.1016/j.carbpol.2021.118701 | DOI Listing |
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