Hydroxyethyl selulose (HEC) ni ether idafite ionic selulose ether ikoreshwa cyane mubwubatsi, gutwikira, peteroli, imiti ya buri munsi nindi mirima. Ifite umubyimba mwiza, guhagarikwa, gutatanya, emulisile, gukora firime, kurinda colloid nibindi bintu, kandi ni umubyimba wingenzi kandi uhindura.
1. Gutegura ibikoresho fatizo
Ibikoresho nyamukuru bya hydroxyethyl selile ni selile naturel. Ubusanzwe selile ikurwa mubiti, ipamba cyangwa ibindi bimera. Gukuramo selile ya selile biroroshye cyane, ariko bisaba ubuziranenge bwinshi kugirango ukore neza ibicuruzwa byanyuma. Kubera iyo mpamvu, uburyo bwa chimique cyangwa ubukanishi bukoreshwa muburyo bwo kuvura mbere ya selile, harimo gusiba, kutanduza, guhumanya nizindi ntambwe zo gukuraho umwanda nibigize selile.
2. Kuvura alkalisation
Kuvura alkalisiyasi nintambwe yingenzi mubikorwa byo kubyara hydroxyethyl selile. Intego yiyi ntambwe ni ugukora hydroxyl group (-OH) kumurongo wa selile ya selile kugirango byorohereze reaction ya etherification. Sodium hydroxide (NaOH) igisubizo gikoreshwa nkibintu byangiza. Inzira yihariye ni: kuvanga selile na sodium hydroxide yumuti kugirango ubyimba kandi ukwirakwize selile mubihe bya alkaline. Muri iki gihe, amatsinda ya hydroxyl kuri molekile ya selile arakora cyane, yitegura reaction ya etherification.
3. Igisubizo cya Etherification
Etherification reaction nintambwe yibanze mugukora hydroxyethyl selile. Ubu buryo ni ukumenyekanisha okiside ya Ethylene (izwi kandi nka Ethylene oxyde) muri selile nyuma yo kuvura alkalinisation, hanyuma ikitwara hamwe nitsinda rya hydroxyl muri molekile ya selile kugirango ikore hydroxyethyl selile. Ubusanzwe reaction ikorerwa mumashanyarazi afunze, ubushyuhe bwa reaction bugenzurwa kuri 50-100 ° C, kandi igihe cyo kubyitwaramo kiva kumasaha menshi kugeza kumasaha arenga icumi. Igicuruzwa cyanyuma cyibisubizo ni hydroxyethylated selulose ether igice.
4. Kutabogama no gukaraba
Nyuma ya etherification reaction irangiye, reaction zisanzwe zirimo alkali nyinshi zidakozwe hamwe nibicuruzwa. Kugirango ubone hydroxyethyl selulose yuzuye, kubogama no gukaraba bigomba gukorwa. Mubisanzwe, acide acide (nka acide hydrochloric acide) ikoreshwa muguhindura alkali isigaye mubisubizo, hanyuma reaction ikozwa inshuro nyinshi namazi menshi kugirango ikureho umwanda ushonga mumazi nibicuruzwa. Hydroxyethyl selile yogejwe ibaho muburyo bwa cake itose.
5. Umwuma no Kuma
Cake itose nyuma yo gukaraba ifite amazi menshi kandi igomba gukama kandi ikuma kugirango ibone ifu ya hydroxyethyl selile. Umwuma ukunze gukorwa no kuyungurura vacuum cyangwa gutandukanya centrifugal kugirango ukureho amazi menshi. Nyuma, umutsima utose woherezwa mubikoresho byo kumisha. Ibikoresho bisanzwe byumye birimo ibyuma byuma, flash yumye hamwe nuwumisha. Ubushyuhe bwo kumisha muri rusange bugenzurwa kuri 60-120 ℃ kugirango birinde ubushyuhe bukabije butera ibicuruzwa cyangwa kwangirika kwimikorere.
6. Gusya no Kugaragaza
Hydroxyethyl selulose yumye mubisanzwe ni ikintu kinini cyangwa ibintu bya granular. Kugirango byoroherezwe gukoresha no kunoza ikwirakwizwa ryibicuruzwa, bigomba kuba hasi kandi bikerekanwa. Gusya mubisanzwe bikoresha imashini isya kugirango isya ibintu byinshi mubifu. Kugenzura ni ugutandukanya ibice bito bitagera ku bunini busabwa mu ifu nziza binyuze muri ecran hamwe na aperture zitandukanye kugirango hamenyekane neza ibicuruzwa byanyuma.
7. Gupakira ibicuruzwa nububiko
Hydroxyethyl selulose yibicuruzwa nyuma yo gusya no kuyisuzuma bifite fluxité no gutandukana, bikwiriye gukoreshwa muburyo butaziguye cyangwa gutunganywa neza. Ibicuruzwa byanyuma bigomba gupakirwa no kubikwa kugirango birinde ubushuhe, kwanduza cyangwa okiside mugihe cyo gutwara no kubika. Ibikoresho bipfunyika kandi birwanya anti-okiside nkibikapu bya aluminium foil cyangwa imifuka myinshi igizwe nibisanzwe bikoreshwa mubipakira. Nyuma yo gupakira, ibicuruzwa bigomba kubikwa ahantu hakonje kandi humye, hirindwa urumuri rwizuba nubushyuhe bwo hejuru hamwe nubushyuhe bwinshi kugirango habeho imikorere ihamye.
Igikorwa cyo gukora hydroxyethyl selulose gikubiyemo ahanini gutegura ibikoresho fatizo, kuvura alkalisation, reaction ya etherification, kutabogama no gukaraba, umwuma no gukama, gusya no gusuzuma, hamwe no gupakira ibicuruzwa no kubika. Buri ntambwe ifite gahunda yihariye isabwa hamwe ningingo zo kugenzura. Imiterere yimyitwarire hamwe nibikorwa byihariye bigomba kugenzurwa cyane mugihe cyibikorwa kugirango habeho ubuziranenge kandi buhamye bwibicuruzwa. Ibikoresho byinshi bya polymer bifite ibikoresho byinshi mubikorwa byinganda nubuzima bwa buri munsi, byerekana akamaro kayo kadasubirwaho.
Igihe cyo kohereza: Kanama-21-2024