| 초록 |
Cellulose acetate is one of the most important cellulose derivatives which are extensively used in several activities (coatings, membranes, cigar filters, etc.) because of its low-cost, toughness, gloss, high transparency, natural feel, and other favorable aesthetic properties. A variety of raw materials such as cotton, recycled paper, crop straw, wood pulp, corncob, corn fiber, rice hulls, and bacterial cellulose have been used to make cellulose acetate. This is an alternative useful new method for cellulose triacetate synthesis using grain by-product. Four types of cereal bran (chaff, soybean peel powder, corn bran, and wheat bran) were used to study for the production of cellulose triacetate. The process consists of three steps of cellulose separation from cereal bran with ionic liquid, cellulose recrystallization, and cellulose acetylation. The cellulose triacetate with a degree of substitution of 2.93 was obtained under the reaction of acetic anhydride at 55°C with drastically reducing the number of steps currently required to produce this derivative from raw materials itself. Final result was characterized using NMR analysis. |
