Synthesis and Characterization of Hydroxypropylmethyl Cellulose from “Air Particle Vacuum Dust”

Abstract

Tr en Bu çalışmada, Kahramanmaraş’ta bulunan tekstil fabrikalarında atık olarak çıkan ve “klima toz”u (APVD) olarak adlandırılan selüloz içerikli iplik olmaya elverişsiz pamuk lifleri değerlendirilmiştir. Bu amaçla, ilk olarak atık klima tozu musluk suyu ile yığın halinde yıkanarak % 17,5’luk NaOH ile 90 ^oC’de pişirilmiştir. Bu yığın kurutulmadan NaOH ve H₂O₂ ile 90 ^oC’de ağartılmıştır. Sonra elde edilen selüloz NaOH ile soğuk ortamda merserize edilmiştir. Daha sonra selülozunun, propilenoksit (PO) ve metilklorür ile heterojen reaksiyonundan, yüksek (HPMC-H), orta (HPMC-M) ve düşük (HPMC-L) sübsitasyon derecesine sahip üç farklı hidroksipropilmetil selüloz (HPMC) sentezlen-miştir. Sentezlenen HPMC’lerin yapıları FT-IR ve XRD spektroskopisi ile aydınlatılarak DTA-TG ile termal davranışları, SEM ile yüzey morfolojileri incelenmiştir. HPMC örneklerinin viskoziteleri tayin edilip en yüksek değer 820 cP olarak bulunmuştur. In this study, in cotton factories located in Kahramanmaraş, waste cotton fibers which are not suitable for cellulose fiber yarns called “air particle vacuum dust” (APVD) have been evaluated. For this purpose, the waste was firstly washed with tap water and then, boiled at 90 °C with 17.5% NaOH. This batch was bleached at 90 ^oC by H₂O₂ in basic solution without drying. The cellulose obtained was then mercerized by NaOH in cold temperature. Hydroxypropylmethyl cellulose which has three different substitution degree [high (HPMC-H), medium (HPMC-M) and low (HPMC-L)] was then synthesized with propyleneoxide (PO) and methylchloride in the heterogeneous reaction media. The structures of the synthesized HPMCs were characterized by FT-IR and XRD. Thermal behaviors of HPMCs were investigated by the DTA-TG method and their surface morphology was analyzed by the SEM method. The viscosities of HPMCs samples were determined and to be the highest 820 cP.