Mu gikoresho cyavanzwe neza, igihe kingana n'ahoeteri ya selulosebishobora kunoza cyane imikorere ya mortilage itose, bigaragara ko eteri ya cellulose ari inyongeramusaruro nyamukuru igira ingaruka ku mikorere y'ubwubatsi bwa mortilage.
Guhitamo ubwoko butandukanye bw'ibimera, ubushyuhe butandukanye, ingano zitandukanye z'uduce, ubushyuhe butandukanye no kongeramo eteri za selulose nabyo bigira ingaruka zitandukanye ku kunoza imikorere ya selulose y'ifu yumye. Muri iki gihe, selulose nyinshi zo mu mabuye y'agaciro n'izisimwa zifite ubushobozi buke bwo kubika amazi, kandi amazi azatandukana nyuma y'iminota mike ahagaze. Bityo rero, ni ngombwa cyane kongeramo eteri ya selulose muri selulose ya sima.
kubika amazi
Kubika amazi ni ingenzi cyane kuri eteri ya methyl cellulose, kandi ni imikorere ikorwa n’inganda nyinshi zikora imashini zivanga imvange y’amazi mu ngo, cyane cyane izo mu turere two mu majyepfo dufite ubushyuhe bwinshi.
Mu gukora ibikoresho by'ubwubatsi, cyane cyane ifu yumye, eteri ya selulose igira uruhare rudasimburwa, cyane cyane mu gukora imashini yihariye (imashini yahinduwe), ni igice cy'ingenzi kandi cy'ingenzi.
Ubushyuhe, ingano, ubushyuhe bw’ikirere n’imiterere ya molekile ya eteri ya selulosi bigira ingaruka zikomeye ku mikorere yayo yo kubika amazi. Mu bihe bimwe, uko eteri ya selulosi irushaho kuba nini, ni ko amazi arushaho kugumana; uko ingano iba nyinshi, ni ko amazi arushaho kugumana. Ubusanzwe, eteri nto ya selulosi ishobora kongera cyane uburyo amazi abikwa muri mortilage. Iyo ingano igeze ku rugero runaka Iyo ingano yo kubika amazi yiyongera, icyerekezo cyo kubika amazi kiragabanuka; iyo ubushyuhe bw’ikirere buzamutse, ubushyuhe bw’amazi ya eteri ya selulosi bukunze kugabanuka, ariko zimwe muri eteri za selulosi zahinduwe nazo zifite ubushobozi bwo kubika amazi neza mu gihe cy’ubushyuhe bwinshi; fibre zifite urwego rwo hasi rwo gusimbuza eteri ya Vegan ifite ubushobozi bwo kubika amazi neza.
Itsinda rya hydroxyl riri kuri molekile ya eteri ya selulosi na atome ya ogisijeni iri kuri eteri bifitanye isano na molekile y'amazi kugira ngo bikore umugozi wa hydrogen, bigahindura amazi yigenga mo amazi yigenga, bityo bikagira uruhare runini mu kubika amazi; molekile y'amazi n'umuyoboro wa eteri ya selulosi Interdiffusion yemerera molekile z'amazi kwinjira imbere mu muyoboro wa macromolecular wa eteri ya selulosi kandi bigahura n'imbaraga zikomeye zo gufatanya, bityo bigakora amazi yigenga, amazi yivanze, kandi bikanoza kubika amazi ya sima; eteri ya selulosi inoza slurry nshya ya sima Imiterere ya rheological, imiterere y'urusobe rw'amazi n'umuvuduko wa osmotic cyangwa imiterere ya filime ya eteri ya selulosi ibangamira ikwirakwira ry'amazi.
gukurura no gukurura thixotropi
Eteri ya selulosiItuma sima itose irushaho kuba nziza, ibyo bikaba bishobora kongera ubushobozi bwo gufatanya hagati ya sima itose n'urwego rw'ibanze, kandi bikongera ubushobozi bwo kudacika intege bwa sima. Ikoreshwa cyane mu gusigwa sima, sima ifata amatafari n'uburyo bwo gukingira inkuta. Ingaruka zo gukomera kwa eteri ya cellulose zishobora kandi kongera ubushobozi bwo kurwanya gukwirakwira no guhuza ibikoresho bishya, gukumira gutandukana kw'ibikoresho, gutandukanya no kuva amaraso, kandi ishobora gukoreshwa muri sima ya fibre, sima yo munsi y'amazi na sima yikora ubwayo.
Ingaruka zo gukuba kwa eteri ya selulosi ku bikoresho bishingiye kuri sima ziva ku bucucike bwa eteri ya selulosi. Mu bihe bimwe, uko eteri ya selulosi irushaho kuba nini, ni ko ubucucike bw'ibikoresho byahinduwe bishingiye kuri sima burushaho kuba bwiza, ariko niba ubucucike buri hejuru cyane, bizagira ingaruka ku bucucike no gukora neza kw'ibikoresho (nk'ugushyiraho icyuma cyo gusigwa). Sima yigenga na sima yigenga, ikenera ubucucike bwinshi, ikenera ubucucike buke bwa eteri ya selulosi. Byongeye kandi, ubucucike bwa eteri ya selulosi buzongera amazi akenewe ku bikoresho bishingiye kuri sima kandi byongera umusaruro wa sima.
Umuti w’amazi wa cellulose ether ufite ubushyuhe bwinshi ufite thixotropy nyinshi, ari nabyo biranga cellulose ether. Imiti y’amazi ya methyl cellulose akenshi iba ifite ubushyuhe bwa pseudoplastic na non-thixotropic munsi y’ubushyuhe bwa gel yayo, ariko igaragaza imiterere y’amazi ya Newtonian ku gipimo gito cyo gukata. Pseudoplasticity yiyongera uko uburemere bwa molekile cyangwa ubwinshi bwa cellulose ether, hatitawe ku bwoko bw’umusimbura n’urwego rwo gusimbuza. Kubwibyo, cellulose ethers zo mu rwego rumwe rwa viscosity, uko byaba biri kose, MC, HPMC, HEMC, zizahora zigaragaza imiterere imwe ya rheological igihe cyose ubushyuhe n’ubushyuhe biguma bihamye. Gels z’imiterere zibaho iyo ubushyuhe buzamuwe, kandi habaho urujya n’uruza rwa thixotropic rwinshi.
Eteri za cellulose zifite ubucucike bwinshi kandi zifite ubucucike buke zigaragaza thixotropy ndetse no munsi y'ubushyuhe bwa gel. Iyi miterere ifite akamaro kanini mu guhindura uburyo bwo kugorora no kumanuka mu bwubatsi bwa mortilage. Aha hagomba gusobanurwa ko uko eteri ya cellulose ifite ubucucike bwinshi, ni ko amazi agumana neza, ariko uko viscosity irushaho kuba nyinshi, ni ko uburemere bwa molekile ya cellulose ether burushaho kuba bwinshi, ndetse no kugabanuka k'ubushongi bwayo, bigira ingaruka mbi ku bucucike bwa mortilage n'imikorere yayo.
Gutanga amahugurwa mu kirere
Eteri ya selulosi ifite ingaruka zigaragara zo gushyira umwuka mu bikoresho bishya bishingiye kuri sima. Eteri ya selulosi ifite amatsinda yombi akunda amazi (amatsinda ya hydroxyl, amatsinda ya eteri) n'amatsinda akunda amazi (amatsinda ya methyl, impeta za glucose), kandi ni surfactant ifite imikorere yo hejuru, bityo ikaba ifite ingaruka zo gushyira umwuka mu kirere. Ingaruka zo gushyira umwuka mu kirere za eteri ya selulosi zizatanga ingaruka nziza, zishobora kunoza imikorere y'ibikoresho bishya bivanze, nko kongera ubuziranenge n'ubuso bw'ibumba mu gihe cyo gukora, ibyo bikaba byiza mu gukwirakwiza ibumba; bizongera kandi umusaruro w'ibumba, bigabanye ikiguzi cyo gukora ibumba; ariko bizongera ubwiyongere bw'ibikoresho bikomeye kandi bigabanye imiterere yabyo nk'imbaraga na modulus yoroshye.
Nk'umusemburo w'ibintu bikoreshwa mu gusukura, eteri ya selulose ifite ingaruka zo gutosesha cyangwa gusiga amavuta ku duce twa sima, ibyo byongera ubushuhe bw'ibikoresho bishingiye kuri sima hamwe n'ingaruka zayo zo guhumeka mu mwuka, ariko ubushuhe bwayo buzagabanya ubushuhe. Ingaruka zo guhumeka ni uruvange rw'ingaruka zo gushonga no gushonga. Muri rusange, iyo ingano ya eteri ya selulose iri hasi cyane, imikorere nyamukuru ni ugushonga cyangwa kugabanya amazi; iyo ingano iri hejuru, ubushuhe bwa eteri ya selulose bwiyongera vuba, kandi ingaruka zayo zo guhumeka mu mwuka zikunda kuba nyinshi. Bityo bigaragara nk'ingaruka zo kongera ubushuhe cyangwa kwiyongera k'ubukene bw'amazi.
gutinda
Eteri ya selulosibizongerera igihe cyo gushyiraho sima cyangwa sima, kandi bitinde imiterere y’amazi ya sima, ibyo bikaba ingirakamaro mu kunoza igihe cyo gukora kw’ibikoresho bishya bivanze, kunoza imiterere ya sima no gutakaza sima uko igihe kigenda gihita, ariko bishobora no gutera gutinda kubaka.
Igihe cyo kohereza: 25 Mata 2024