Cellulose ether ni polymer ikorwa muri cellulose karemano binyuze mu nzira yo gukwirakwiza ether, kandi ni ikintu cyiza cyane cyo gukurura no kubika amazi.
Amasomo y'ubushakashatsi
Etha za selulosi zakoreshejwe cyane mu mvange yumye mu myaka ya vuba aha, izikoreshwa cyane ni zimwe muri etha za selulosi zitari ioni, harimo methyl cellulose ether (MC), hydroxyethyl cellulose ether (HEC), hydroxyethyl cellulose ether Methyl cellulose ether (HEMC) na hydroxypropyl methyl cellulose ether (HPMC). Kuri ubu, nta nyandiko nyinshi zihari ku buryo bwo gupima ubukana bw'umuti wa selulosi ether. Mu gihugu cyacu, hari amahame amwe n'amwe n'amakuru amwe gusa agaragaza uburyo bwo gupima ubukana bw'umuti wa selulosi ether.
Uburyo bwo gutegura umuti wa eteri ya selulose
Gutegura umuti wa Methyl Cellulose Ether
Methyl cellulose ethers bivuga cellulose ethers zirimo amatsinda ya methyl muri molekile, nka MC, HEMC na HPMC. Bitewe n'uko itsinda rya methyl ridashobora gushonga neza, ibisubizo bya cellulose ether birimo amatsinda ya methyl bifite ubushobozi bwo gushyuha, ni ukuvuga ko bidashonga mu mazi ashyushye ku bushyuhe buri hejuru y'ubushyuhe bwabyo bwo gushyuha (hafi 60-80°C). Kugira ngo wirinde ko umuti wa cellulose ether urema agglomerates, shyushya amazi hejuru y'ubushyuhe bwa gel yayo, hafi 80~90°C, hanyuma ongeramo ifu ya cellulose ether mu mazi ashyushye, uvange kugira ngo ikwirakwizwe, ikomeze kuvanga no gukonja Ku bushyuhe bwashyizweho, ishobora gutegurwa mu muti wa cellulose ether umeze kimwe.
Imiterere y'ingufu za ethers zirimo methylcellulose zidatunganyijwe ku buso
Kugira ngo hirindwe ko eteri ya selulosi iterana mu gihe cyo gushonga, abakora ibikoresho rimwe na rimwe bakora imiti ku bicuruzwa bya selulosi ifu kugira ngo batinde gushonga. Gushonga kwayo bibaho nyuma yuko eteri ya selulosi itatanye burundu, bityo ishobora gukwirakwizwa mu mazi akonje ifite pH idafite aho ihuriye n’ibintu biterana. Uko pH y’umuti iba iri hejuru, niko igihe cyo gushonga cya eteri ya selulosi ifite ubushobozi bwo gushonga butinze kigabanuka. Hindura agaciro ka pH y’umuti ku gaciro kanini. Alkalinity izakuraho gushonga gutinze kwa eteri ya selulosi, bigatuma eteri ya selulosi ikora agglomerates iyo ishonga. Kubwibyo, agaciro ka pH k’umuti kagomba kuzamurwa cyangwa kugabanuka nyuma yuko eteri ya selulosi itatanye burundu.
Imiterere y'ingufu za ethers zirimo methylcellulose zitunganyijwe ku buso
Gutegura umuti wa Hydroxyethyl Cellulose Ether
Umuti wa Hydroxyethyl cellulose ether (HEC) ntufite ubushobozi bwo gushyuha, bityo, HEC idatunganyije ubuso nayo ikora agglomerate mu mazi ashyushye. Abakora muri rusange bakora imiti ku buso bwa HEC kugira ngo batinde gushonga, kugira ngo ibashe gukwirakwizwa mu mazi akonje afite pH idafite aho ihuriye n’amazi nta ma-agglomerate. Mu buryo nk’ubwo, mu muti ufite alkalinity nyinshi, HEC ishobora no gukora agglomerate bitewe no gutinda gushonga. Kubera ko slurry ya sima ari alkali nyuma yo gushonga kandi pH y’umuti iri hagati ya 12 na 13, igipimo cyo gushonga cya ether ya cellulose yatunganyijwe ku buso muri sima nacyo ni cyo gihe cyo kwihuta cyane.
Imiterere y'ingufu za HEC yavuwe ku buso
Umwanzuro n'Isesengura
1. Uburyo bwo gukwirakwiza
Kugira ngo hirindwe ingaruka mbi ku gihe cyo gupima bitewe no gushonga buhoro buhoro kw'ibintu bitunganya ubuso, ni byiza gukoresha amazi ashyushye mu gutegura.
2. Uburyo bwo gukonjesha
Ibikoresho bya eteri ya selulosi bigomba kuvangwa no gukonjeshwa ku bushyuhe bw'ikirere kugira ngo bigabanye igipimo cyo gukonjesha, bisaba igihe kirekire cyo kugerageza.
3. Uburyo bwo gukangura
Nyuma yuko eteri ya selulosi ishyizwe mu mazi ashyushye, menya neza ko ukomeza kuvanga. Iyo ubushyuhe bw'amazi bugabanutse munsi y'ubushyuhe bwa gel, eteri ya selulosi izatangira gushonga, kandi umuti uzagenda urushaho kuba nk'ufite ubushyuhe. Muri iki gihe, umuvuduko wo kuvanga ugomba kugabanuka. Nyuma yuko umuti ugeze ku rugero runaka, ugomba guhagarara amasaha arenga 10 mbere yuko uduheri dutangira kureremba buhoro buhoro hejuru kugira ngo duturike kandi tubure.
Udupira tw'umwuka muri Selilulosi Ether Solution
4. Uburyo bwo kuvura amazi
Ubwiza bwa eteri ya selulosi n'amazi bugomba gupimwa neza, kandi ntutegereze ko umuti ugera ku bushyuhe bwinshi mbere yo kongera kuzuza amazi.
5. Ikizamini cy'ubukana
Bitewe n’uko umuti wa eteri ya selulose umeze, iyo upimye ubukana bwawo, iyo rotor ya viscometer izunguruka yinjijwe mu muti, bizabangamira umuti kandi bigira ingaruka ku bipimo. Bityo, nyuma yuko rotor yinjijwe mu muti, igomba kureka ikamara iminota 5 mbere yo gupimwa.
Igihe cyo kohereza ubutumwa: Werurwe-22-2023