Cellulose ether (CE) ni ubwoko bw'ibintu bivamo bivamo hakoreshejwe uburyo bwa chemically modulation cellulose. Cellulose ni igice cy'ingenzi cy'inkuta z'uturemangingo tw'ibimera, naho cellulose ethers ni urukurikirane rwa polymers zikorwa no guhindurwa kwa ether kwa hydroxyl groups (–OH) muri cellulose. Zikoreshwa cyane mu nzego nyinshi nko mu bikoresho by'ubwubatsi, mu buvuzi, mu biribwa, mu mavuta yo kwisiga, nibindi, kandi zikoreshwa cyane mu nganda zitandukanye bitewe n'imiterere yazo yihariye y'umubiri n'imiti ndetse n'uburyo zikoreshwa mu buryo butandukanye.
1. Gushyira mu byiciro eteri za selulose
Eteri za selulosi zishobora kugabanywamo ubwoko butandukanye bitewe n'ubwoko bw'ibisimbura mu miterere ya chimique. Uburyo bukunze gushyirwa mu byiciro bushingiye ku itandukaniro ry'ibisimbura. Eteri za selulosi zisanzwe ni izi zikurikira:
Selulose ya Methyl (MC)
Selulosi ya Methyl ikorwa binyuze mu gusimbuza igice cya hydroxyl cya molekile ya selulosi na methyl (–CH₃). Ifite ubushobozi bwo gukomera, gukora filime no gufatanya neza kandi ikunze gukoreshwa mu bikoresho by'ubwubatsi, gusiga irangi, imiti n'inganda z'ibiribwa.
Hydroxypropyl methylcellulose (HPMC)
Hydroxypropyl methylcellulose ni eteri isanzwe ya cellulose, ikoreshwa cyane mu bikoresho by'ubwubatsi, mu buvuzi, mu binyabutabire bya buri munsi no mu biribwa bitewe nuko ishonga neza mu mazi no mu buryo ihamye. HPMC ni eteri ya cellulose itari ionic ifite imiterere yo kubika amazi, kuyakomera no kuyatuza.
Selulose ya karboksimetili (CMC)
Carboxymethyl cellulose ni ether ya cellulose ya anionic ikorwa no kwinjiza amatsinda ya carboxymethyl (–CH₂COOH) muri molekile za cellulose. CMC ifite ubushobozi bwo gushonga neza mu mazi kandi ikunze gukoreshwa nk'ikintu gikomeza ubushyuhe, gikomeza ubushyuhe no gufunga. Igira uruhare runini mu biribwa, mu buvuzi no mu kwisiga.
Selulose ya ethyl (EC)
Selulose ya ethyl iboneka binyuze mu gusimbuza itsinda rya hydroxyl muri selulose na ethyl (–CH₂CH₃). Ifite ubushobozi bwo kudakoresha amazi neza kandi ikunze gukoreshwa nk'ikintu gikingira firime ndetse n'ibikoresho bigenzurwa mu nganda zikora imiti.
2. Imiterere y'umubiri n'imiti ya eteri za selulose
Imiterere y'ibintu bifatika n'ibinyabutabire bya eteri za selulose bifitanye isano rya hafi n'ibintu nk'ubwoko bwa eteri ya selulose, ubwoko bw'isimbura ndetse n'urwego rwo gusimbuza. Imiterere yayo y'ingenzi irimo ibi bikurikira:
Gushonga no gushonga kw'amazi
Eteri nyinshi za selulosi zifite ubushobozi bwo gushonga neza mu mazi kandi zishobora gushonga mu mazi akonje cyangwa ashyushye kugira ngo zikore umuti wa colloidal ubonerana. Urugero, HPMC, CMC, nibindi bishobora gushonga vuba mu mazi kugira ngo bikore umuti ufite ubukana bwinshi, ukoreshwa cyane mu bikorwa bifite ibisabwa nko gukurura, gusunika no gukora firime.
Imiterere yo gukurura no gukora filime
Eteri za selulosi zifite ubushobozi bwiza bwo gukurura kandi zishobora kongera ubukana bw'amazi. Urugero, kongeramo HPMC mu bikoresho by'ubwubatsi bishobora kunoza uburyo bwo gukora neza no gukora neza kwa sima no kongera ubushobozi bwo kwirinda kugwa. Muri icyo gihe, eteri za selulosi zifite ubushobozi bwiza bwo gukora filime kandi zishobora gukora filime imwe irinda ibintu, bityo zikoreshwa cyane mu gusiga no gusiga imiti.
Kubika amazi no kuyagumana neza
Eteri za selulosi zifite ubushobozi bwo kubika amazi neza, cyane cyane mu bijyanye n'ibikoresho by'ubwubatsi. Eteri za selulosi zikunze gukoreshwa mu kunoza uburyo amazi ya sima abikwamo, kugabanya ubukana bw'imisenyi, no kongera igihe cy'ubuzima bwa sima. Mu rwego rw'ibiribwa, CMC ikoreshwa kandi nk'umuti utuma ibiryo bitinda kumuka.
Gukomera kw'ibinyabutabire
Eteri za selulosi zigaragaza ubuziranenge bwiza bwa shimi mu bisubizo bya aside, alkali na electrolyte, kandi zishobora kubungabunga imiterere n'imikorere yabyo mu bintu bitandukanye bigoye bya shimi. Ibi bituma zikoreshwa mu nganda zitandukanye nta kibazo cy'ibindi binyabutabire.
3. Uburyo bwo gukora eteri ya selulose
Ikorwa rya eteri ya selulosi rikorwa ahanini hakoreshejwe uburyo bwa eteri ya selulosi karemano. Intambwe z'ibanze zirimo kuvura selulosi hakoreshejwe alkali, uburyo bwa eteri, gutunganya, n'ibindi.
Uburyo bwo kuvura alkalize
Ubwa mbere, selulose karemano (nk'ipamba, ibiti, nibindi) irahindurwamo alkali kugira ngo ihindure igice cya hydroxyl muri selulose mo umunyu wa alcool ukora cyane.
Uburyo bwo guhindura eteri
Selulose nyuma yo gukora alkalize ikorana n'ikintu gitanga eteri (nk'imiti ya methyl chloride, propylene oxide, nibindi) kugira ngo ikore eteri ya selulose. Bitewe n'imiterere y'ikoreshwa, hashobora kuboneka ubwoko butandukanye bwa eteri za selulose.
Gusukura no kumisha
Eteri ya selulosi ikomoka kuri iyo reaction irasukurwa, yozwa hanyuma ikaniyumishwa kugira ngo haboneke ifu cyangwa umusaruro w'ibinyabutabire. Ubuziranenge n'imiterere y'umusaruro wa nyuma bishobora kugenzurwa hakoreshejwe ikoranabuhanga rikurikiraho ryo gutunganya.
4. Imiterere y'ibikoresho bya eteri ya selulose
Bitewe n'imiterere yihariye y'ibintu bya eteri za selulose, zikoreshwa cyane mu nganda nyinshi. Inzego z'ingenzi zikoreshwa ni izi zikurikira:
Ibikoresho by'ubwubatsi
Mu bijyanye n'ibikoresho by'ubwubatsi, eteri za selulose zikoreshwa cyane cyane nk'ibikomeza amazi no kubika ibintu bikomoka kuri sima n'ibikomoka kuri gypsum. Eteri za selulose nka HPMC na MC zishobora kunoza imikorere y'ubwubatsi bwa selulose, zikagabanya gutakaza amazi, bityo zikongera uburyo bwo gufatana no kudacika kw'imitsi.
Ubuvuzi
Mu nganda zikora imiti, eteri za cellulose zikoreshwa cyane nk'ibikoresho byo gusiga imiti, kole zo gusiga ibinini, n'ibikoresho bigenzurwa. Urugero, HPMC ikunze gukoreshwa mu gutegura irangi ry'imiti kandi igira ingaruka nziza zo gusiga imiti.
Ibiryo
CMC ikunze gukoreshwa nk'umuti ukomeza ubushyuhe, ugabanya ubushyuhe, kandi ugatuma ibiryo bikomera mu nganda z'ibiribwa bikomera. Ikoreshwa cyane mu binyobwa, mu mata no mu biryo bitetse, kandi ishobora kunoza uburyohe n'ubushobozi bwo koroshya ibiryo.
Ibikoresho byo kwisiga n'imiti ya buri munsi
Eteri za selulosi zikoreshwa nk'ibikomeza ubushyuhe n'ibigabanya ubushyuhe ndetse n'ibikomeza ubushyuhe mu mavuta yo kwisiga no mu binyabutabire bya buri munsi, bishobora gutanga imiterere myiza n'ubuziranenge. Urugero, HPMC ikunze gukoreshwa mu bikoresho nk'uburoso bw'amenyo na shampoo kugira ngo bigire imiterere ihamye kandi ihamye.
Imyambaro
Mu nganda zikora irangi, eteri za selulose zikoreshwa nk'ibikomeza ubushyuhe, ibitera firime, n'ibituma firime zihagarara, ibyo bikaba bishobora kongera imikorere y'irangi mu bwubatsi, kunoza uburyo rishyirwa mu mwanya waryo, no gutanga irangi ryiza.
5. Iterambere ry'eteri za selulose mu gihe kizaza
Kubera ko hari kwiyongera gukenewe kurengera ibidukikije, cellulose ether, nk'ikintu gikomoka ku mutungo kamere ushobora kongera gukoreshwa, ifite amahirwe menshi yo gutera imbere. Kubora kwayo, kongera gukoreshwa no gukoresha uburyo butandukanye bituma byitezwe ko izakoreshwa cyane mu bijyanye n'ibikoresho by'icyatsi kibisi, ibikoresho bishobora kwangirika n'ibikoresho by'ubwenge mu gihe kizaza. Byongeye kandi, cellulose ether ifite ubushobozi bwo gukora ubushakashatsi no guteza imbere mu nzego zifite agaciro kanini nko mu buhanga mu by'ubuvuzi n'ibikoresho bigezweho.
Nk'ikintu cy'ingenzi mu binyabutabire, eteri ya selulose ifite akamaro kanini. Kubera ko irushaho gukomera, ifata amazi, ikora filime kandi ikagira ubushobozi bwo kudahinduka, igira uruhare runini mu nzego nyinshi nko mu bwubatsi, mu buvuzi, no mu biribwa. Mu gihe kizaza, hamwe n'iterambere rihoraho ry'ikoranabuhanga no guteza imbere ibitekerezo byo kurengera ibidukikije, amahirwe yo gukoresha eteri ya selulose azarushaho kuba manini kandi atange umusanzu mwinshi mu guteza imbere iterambere rirambye ry'inganda zitandukanye.
Igihe cyo kohereza: 24 Nzeri 2024