Cellulose ahanini ifite uruhare runini rwo kubyimba, gufata amazi no kubaka muri minisiteri no gusiga irangi.
Kubyimba: Cellulose irashobora kubyimba kugirango ihagarike kandi igumane igisubizo kimwe hejuru no hepfo, kandi irwanya kugabanuka.
Kubika amazi: kora minisiteri hanyuma ushire irangi buhoro, kandi ufashe ibikoresho nka ivu na calcium kubyitwaramo mumazi.
Ubwubatsi: Cellulose igira amavuta yo kwisiga, ishobora gukora minisiteri hamwe na coatings bifite ubwubatsi bwiza.
1. Methyl selulose (MC)
Nyuma yipamba itunganijwe ivuwe na alkali, selile ya selile ikorwa binyuze murukurikirane rwibisubizo hamwe na chloride metani nka agent ya etherification. Mubisanzwe, urwego rwo gusimburwa ni 1.6 ~ 2.0, kandi gukemura nabyo biratandukanye hamwe nimpamyabumenyi zitandukanye zo gusimburwa. Nibya non-ionic selulose ether.
(1) Methylcellulose irashonga mumazi akonje, kandi bizagorana gushonga mumazi ashyushye. Igisubizo cyamazi cyacyo kirahagaze neza murwego rwa pH = 3 ~ 12. Ifite guhuza neza na krahisi, guar gum, nibindi byinshi na surfactants. Iyo ubushyuhe bugeze ku bushyuhe bwa gelation, gelation iba.
. Mubisanzwe, niba umubare wongeyeho ari munini, ubwiza ni buto, kandi ubwiza ni bunini, igipimo cyo gufata amazi ni kinini. Muri byo, ingano y’inyongera igira ingaruka zikomeye ku kigero cyo gufata amazi, kandi urwego rw’ubukonje ntiruhwanye neza n’urwego rwo gufata amazi. Igipimo cyo guseswa ahanini biterwa nurwego rwo guhindura isura ya selile na selile nziza. Muri ethers ya selile yavuzwe haruguru, methyl selulose na hydroxypropyl methyl selulose bifite igipimo kinini cyo gufata amazi.
(3) Imihindagurikire yubushyuhe izagira ingaruka zikomeye ku kigero cyo gufata amazi ya methyl selile. Mubisanzwe, uko ubushyuhe buri hejuru, niko gufata amazi ari bibi. Niba ubushyuhe bwa minisiteri burenze 40 ° C, kugumana amazi ya methyl selulose bizagabanuka cyane, bigira ingaruka zikomeye ku iyubakwa rya minisiteri.
(4) Methyl selulose igira ingaruka zikomeye kumikorere no gufatira minisiteri. "Gufatanya" hano bivuga imbaraga zifatika zumvwa hagati yumukozi usaba umukozi nu rukuta, ni ukuvuga kurwanya inkovu. Kwizirika hejuru ni byinshi, kurwanya inkweto za minisiteri ni nini, kandi imbaraga zisabwa n'abakozi mu gihe cyo gukoresha nazo ni nini, kandi imikorere ya minisiteri ikennye. Methyl selile yifata iri murwego ruciriritse mubicuruzwa bya selile.
2. Hydroxypropylmethylcellulose (HPMC)
Hydroxypropyl methylcellulose ni selile ya selile itanga umusaruro nogukoresha byiyongereye vuba mumyaka yashize. Ni selile idafite ionic ivanze ya ether ikozwe mu ipamba itunganijwe nyuma ya alkalisation, ukoresheje okiside ya propylene na methyl chloride nka agent ya etherification, binyuze mubisubizo. Urwego rwo gusimbuza muri rusange ni 1.2 ~ 2.0. Imiterere yacyo iratandukanye bitewe numubare utandukanye wibintu bya mikorobe na hydroxypropyl.
(1) Hydroxypropyl methylcellulose irashobora gushonga byoroshye mumazi akonje, kandi izahura ningorane zo gushonga mumazi ashyushye. Ariko ubushyuhe bwacyo bwo mumazi ashyushye buri hejuru cyane ugereranije na methyl selile. Ubushyuhe bwo mumazi akonje nabwo buratera imbere cyane ugereranije na methyl selulose.
. Ubushyuhe nabwo bugira ingaruka ku bwenge bwabwo, uko ubushyuhe bwiyongera, ubukonje bugabanuka. Nyamara, ubukonje bwacyo bwinshi bugira ingaruka zubushyuhe burenze methyl selile. Igisubizo cyacyo gihamye iyo kibitswe mubushyuhe bwicyumba.
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(4) Hydroxypropyl methylcellulose ihamye kuri aside na alkali, kandi igisubizo cyayo cyamazi kirahagaze neza murwego rwa pH = 2 ~ 12. Soda ya Caustic n'amazi ya lime ntacyo bihindura mubikorwa byayo, ariko alkali irashobora kwihutisha iseswa ryayo kandi ikongera ububobere bwayo. Hydroxypropyl methylcellulose ihagaze neza kumunyu usanzwe, ariko iyo ubunini bwumuti wumunyu mwinshi, ubwiza bwumuti wa hydroxypropyl methylcellulose bikunda kwiyongera.
. Nka alcool ya polyvinyl, ibinyamisogwe ether, amase y'imboga, nibindi.
. Gufatanya na hydroxypropyl methylcellulose mukubaka minisiteri birenze ibya methylcellulose.
3. Hydroxyethyl selulose (HEC)
Ikozwe mu ipamba itunganijwe ivurwa na alkali, ikanakoreshwa na okiside ya Ethylene nka etherification agent imbere ya acetone. Urwego rwo gusimburwa muri rusange ni 1.5 ~ 2.0. Ifite hydrophilicity ikomeye kandi byoroshye gukuramo ubuhehere.
(1) Hydroxyethyl selulose irashobora gushonga mumazi akonje, ariko biragoye gushonga mumazi ashyushye. Igisubizo cyacyo gihamye mubushyuhe bwo hejuru nta geli. Irashobora gukoreshwa igihe kirekire munsi yubushyuhe bwo hejuru muri minisiteri, ariko kubika amazi yayo biri munsi yubwa methyl selile.
(2) Hydroxyethyl selulose ihamye kuri aside rusange na alkali. Alkali irashobora kwihutisha iseswa ryayo kandi ikongerera gato ubwiza bwayo. Ikwirakwizwa ryayo mumazi ni mabi cyane ugereranije na methyl selulose na hydroxypropyl methyl selulose. .
(3) Hydroxyethyl selulose ifite imikorere myiza yo kurwanya-sag kuri minisiteri, ariko ifite igihe kirekire cyo kudindiza sima.
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4. Carboxymethyl selulose (CMC)
Ionic selulose ether ikozwe muri fibre karemano (ipamba, nibindi) nyuma yo kuvurwa na alkali hanyuma igakoreshwa nka etherification ikoresheje uburyo bwo kuvura. Urwego rwo gusimburwa muri rusange ni 0.4 ~ 1.4, kandi imikorere yarwo igira ingaruka cyane kurwego rwo gusimburwa.
(1) Carboxymethyl selulose ni hygroscopique, kandi izaba irimo amazi menshi mugihe abitswe mubihe rusange.
. Iyo ubushyuhe burenze 50 ° C, ubukonje ntibusubira inyuma.
(3) Guhagarara kwayo bigira ingaruka cyane kuri pH. Mubisanzwe, irashobora gukoreshwa muri minisiteri ishingiye kuri gypsumu, ariko ntabwo ikoreshwa muri minisiteri ishingiye kuri sima. Iyo alkaline nyinshi, itakaza ubukonje.
(4) Kubika amazi yayo biri hasi cyane ugereranije na methyl selulose. Ifite ingaruka mbi kuri gypsumu ishingiye kuri minisiteri kandi igabanya imbaraga zayo. Nyamara, igiciro cya carboxymethyl selulose kiri hasi cyane ugereranije na methyl selile
Uruhare rwa hydroxypropyl methylcellulose mu nganda zo gutwikira: Kubera ko HPMC ifite imitungo isa nizindi eferi zishonga amazi, irashobora gukoreshwa nkigikoresho cyo gukora firime, kubyimbye, emulisiferi na stabilisateur mu gusiga amarangi hamwe n’ibice bisiga amarangi. umukozi, nibindi, kugirango igifuniko gifite kwihanganira kwambara neza. Kuringaniza no gufatira hamwe, no kunoza ubuso bwubuso, guhagarara kuri aside na alkali, no guhuza ibyuma byuma. Kuberako ingingo ya gel ya HPMC iruta iya MC, irwanya isuri ya bagiteri nayo irakomeye kuruta izindi ether ya selile, bityo irashobora gukoreshwa nkibyimbye kugirango irangi ryamazi. HPMC ifite ububiko bwiza bwo kubika neza, kandi ifite itandukaniro ryiza cyane, kubwibyo birakwiriye cyane cyane nko gukwirakwiza impuzu za emulisile.
Igihe cyo kohereza: Werurwe-04-2023