Cellulose ether ni polymer ikoze mu buryo bwa sillulose karemano binyuze mu guhindura shimi. Cellulose ether ni ikintu gikomoka kuri cellulose karemano. Ikorwa rya cellulose ether ritandukanye na polymer zikoze mu buryo bwa sillulose. Ibikoresho byayo by'ibanze ni cellulose, imvange ya polymer karemano. Bitewe n'imiterere ya cellulose karemano, cellulose ubwayo ntabwo ifite ubushobozi bwo gukorana n'ibintu bihindura ether. Ariko, nyuma yo kuvurwa n'ikintu kibyimba, imigozi ikomeye ya hydrogen hagati y'iminyururu ya molekile n'iminyururu irasenyuka, kandi irekurwa ry'itsinda rya hydroxyl rihinduka cellulose ya alkali ikora. Kubona cellulose ether.
Imiterere ya ether za selulosi iterwa n'ubwoko, umubare n'ikwirakwizwa ry'ibisimbura. Uburyo bwo gushyira mu byiciro ether ya selulosi nabwo bushyirwa mu byiciro hakurikijwe ubwoko bw'ibisimbura, urwego rwa ether, gushonga n'imiterere bifitanye isano. Dukurikije ubwoko bw'ibisimbura ku muyoboro wa molekile, ishobora kugabanywamo monoether na ether ivanze. MC dusanzwe dukoresha ni monoether, naho HPMC ni ether ivanze. Methyl cellulose ether MC ni umusaruro nyuma y'uko itsinda rya hydroxyl riri ku gice cya glucose cya cellulose karemano risimbuwe na methoxy. Ni umusaruro uboneka hashingiwe ku gusimbuza igice cy'itsinda rya hydroxyl kuri icyo gice n'itsinda rya methoxy n'ikindi gice n'itsinda rya hydroxypropyl. Formula y'imiterere ni [C6H7O2 (OH)3-mn (OCH3)m [OCH2CH (OH)CH3]n]x Hydroxyethyl methyl cellulose ether HEMC, izi ni zo moko y'ingenzi akoreshwa cyane kandi agurishwa ku isoko.
Ku bijyanye n'uburyo ishonga ishobora gushonga, ishobora kugabanywamo ionic na non-ionic. I-ether za cellulose zidafite ionic zishonga mu mazi zigizwe ahanini n'uruhererekane rubiri rwa alkyl ethers na hydroxyalkyl ethers. Ionic CMC ikoreshwa cyane cyane mu isabune y'ubukorikori, gucapa no gusiga amarangi mu myenda, gushakisha ibiryo n'amavuta. I-MC zidafite ionic, HPMC, HEMC, n'izindi zikoreshwa cyane cyane mu bikoresho by'ubwubatsi, gusiga latex, imiti, imiti ya buri munsi, n'ibindi. Ikoreshwa nk'ingufu, ifata amazi, itera imbaraga, igabanya ubushyuhe n'itera firime.
Kumenya ubuziranenge bwa eteri ya selulose:
Ingaruka z'umubare wa methoxyl ku bwiza: imikorere yo kubika amazi no kuyagwingira
Ingaruka nziza ku gipimo cya hydroxyethoxyl/hydroxypropoxyl: uko igipimo kiri hejuru, niko amazi arushaho kugumana neza.
Ingaruka z'ubwiza bw'ubushyuhe: uko polimeri irushaho kuba nyinshi, ni ko ubushyuhe burushaho kwiyongera kandi amazi akarushaho kugumana neza.
Ingaruka z'ubwiza bw'ubuziranenge: uko ikwirakwira no gushonga neza muri mortiwo, ni ko yihuta kandi irushaho kuba imwe, kandi amazi agakomeza kubikwa neza.
Ingaruka nziza z'ubwiza bw'urumuri: uko polimeri irushaho kuba nyinshi, ni ko polimeri irushaho kuba imwe, kandi umwanda ukagabanuka.
Ingaruka ku bushyuhe bwa gel: ubushyuhe bwa gel bwo kubaka ni hafi 75°C
Ingaruka ku bwiza bw'amazi: <5%, eteri ya selulose yoroshye kuyikuramo ubushuhe, bityo igomba gufungwa no kubikwa
Ingaruka ku bwiza bw'ivu: <3%, uko ivu rirushaho kuba ryinshi, niko imyanda iba myinshi
Ingaruka ku bwiza bw'agaciro ka PH: hafi ya eteri ya selulose ifite imikorere ihamye hagati ya PH: 2-11
Igihe cyo kohereza: Gashyantare 14-2023