Hydroxyethyl Methyl Cellulose

Cellulose ether nikintu kinini gikoreshwa na polymer ibikoresho byiza bya chimique bikozwe muri polymer selile selile binyuze mumiti ivura imiti. Nyuma yo gukora nitrate ya selile na selile ya selile mu kinyejana cya 19, abahanga mu by'imiti bakoze urukurikirane rw'ibikomoka kuri selile ya ether nyinshi ya selile, kandi imirima mishya ikoreshwa yavumbuwe ubudahwema, irimo inganda nyinshi. Ibicuruzwa bya selile ya selile nka sodium carboxymethyl selulose (CMC), Ethyl selulose (EC), hydroxyethyl selulose (HEC), hydroxypropyl selulose (HPC), methyl hydroxyethyl selulose (MHEC) na methyl hydroxypropyl selulose (MHPC) nibindi byitwa selile. “Inganda monosodium glutamate” kandi yakoreshejwe cyane mu gucukura peteroli, kubaka, gutwikira, ibiryo, imiti n'imiti ya buri munsi.

Hydroxyethylmethylcellulose. Ifite ibiranga kubyimba, guhambira, gutatanya, kwigana, gukora firime, guhagarika, adsorbing, gell, hejuru yubutaka, kubungabunga ubushuhe no kurinda colloid. Bitewe nubuso bukora bwibikorwa byamazi yo mumazi, birashobora gukoreshwa nkumuti urinda colloidal, emulifier na dispersant. Hydroxyethyl methylcellulose igisubizo cyamazi gifite hydrophilique nziza kandi nikintu cyiza cyo gufata amazi. Kuberako hydroxyethyl methylcellulose irimo amatsinda ya hydroxyethyl, ifite ubushobozi bwiza bwo kurwanya mildew, guhagarara neza kwijimye no kurwanya indwara ya mildew mugihe cyo kubika igihe kirekire.

Hydroxyethyl methylcellulose (HEMC) itegurwa no kwinjiza insimburangingo ya Ethylene (MS 0.3 ~ 0.4) muri methylcellulose (MC), kandi kurwanya umunyu ni byiza kuruta ibya polimeri idahinduwe. Ubushyuhe bwa methylcellulose nabwo buri hejuru ya MC.

Imiterere:

Ikiranga:

Ibintu nyamukuru biranga hydroxyethyl methylcellulose (HEMC) ni:

1. Gukemura: Kubora mumazi hamwe na solge organic. HEMC irashobora gushonga mumazi akonje. Kwibanda kwayo kwinshi kugenwa gusa nubwiza. Gukemura biratandukanye nubwiza. Hasi ya viscosity, niko gukomera.
2. Kurwanya umunyu: Ibicuruzwa bya HEMC ni ethers ya selile ya ionic kandi ntabwo ari polyelectrolytes, kubwibyo rero birasa neza mubisubizo byamazi mugihe umunyu wicyuma cyangwa electrolytique kama, ariko kwiyongera kwinshi kwa electrolytite bishobora gutera gelation nubushyuhe.
3. Igikorwa cyo hejuru: Bitewe nubuso bukora bwibikorwa byamazi yo mumazi, birashobora gukoreshwa nkibikoresho birinda colloidal, emulifier na dispersant.
4. Gele yubushyuhe: Iyo igisubizo cyamazi cyibicuruzwa bya HEMC gishyushye kubushyuhe runaka, gihinduka opaque, geles, nubushyuhe, ariko iyo gikomeje gukonjeshwa, gisubira mubisubizo byumwimerere, hamwe nubushyuhe iyi gel hamwe nubushyuhe. bibaho ahanini Biterwa na lubricants, infashanyo zihagarika, colloide ikingira, emulisiferi nibindi.
5. Metabolism inert numunuko muke nimpumuro nziza: HEMC ikoreshwa cyane mubiribwa nubuvuzi kuko itazahinduka kandi ifite impumuro nziza nimpumuro nziza.
6. Kurwanya indwara: HEMC ifite imbaraga zo guhangana nindwara nziza kandi itajegajega neza mugihe cyo kubika igihe kirekire.
7. PH itajegajega: Ubukonje bwumuti wamazi wibicuruzwa bya HEMC ntibibangamiwe cyane na aside cyangwa alkali, kandi agaciro ka pH karahagaze neza murwego rwa 3.0 kugeza 11.0.

Gusaba:

Hydroxyethyl methylcellulose irashobora gukoreshwa nkigikoresho cyo gukingira colloidal, emulisiferi no gutatana kubera imikorere yacyo igaragara mubisubizo byamazi. Ingero zikoreshwa ni izi zikurikira:

1. Ingaruka za hydroxyethyl methylcellulose kumikorere ya sima. Hydroxyethyl methylcellulose ni ifu yera itagira impumuro nziza, itaryoshye, idafite uburozi ishobora gushonga mumazi akonje kugirango ibe igisubizo kiboneye. Ifite ibiranga kubyimba, guhambira, gutatanya, kwigana, gukora firime, guhagarika, adsorbing, gell, hejuru yubutaka, kubungabunga ubushuhe no kurinda colloid. Kubera ko igisubizo cyamazi gifite ubuso bukora cyane, kirashobora gukoreshwa nkumuti urinda colloidal, emulifier na dispersant. Hydroxyethyl methylcellulose igisubizo cyamazi gifite hydrophilique nziza kandi nikintu cyiza cyo gufata amazi.
2. Irangi ryubutabazi rifite imiterere ihindagurika ryateguwe, rikozwe mubikoresho bikurikira bikurikira mubice byuburemere: 150-200 g y'amazi ya deionion; 60-70 g ya emulion yuzuye ya acrylic; 550-650 g ya calcium iremereye; 70-90 g y'ifu ya talcum; 30-40g shingiro ya selile yumuti wamazi; 10-20g lignocellulose igisubizo cyamazi; Imfashanyo yo gukora firime 4-6g; 1.5-2.5g antiseptike na bagiteri; 1.8-2.2g ikwirakwiza; 3.5-4.5g; Ethylene glycol 9-11g; Hydroxyethyl methylcellulose yumuti wamazi ikorwa mugushonga 2-4% hydroxyethyl methylcellulose mumazi; Amazi ya lignocellulose akozwe muri 1-3% Lignocellulose ikorwa no gushonga mumazi.

Imyiteguro:

Uburyo bwo gutegura hydroxyethyl methylcellulose, uburyo nugukoresha ipamba itunganijwe nkibikoresho fatizo na okiside ya Ethylene nkumuti wa etherification kugirango utegure hydroxyethyl methylcellulose. Ibice byuburemere bwibikoresho fatizo byo gutegura hydroxyethyl methyl selulose nibi bikurikira: ibice 700-800 bya toluene na isopropanol bivanze nkibishishwa, ibice 30-40 byamazi, ibice 70-80 bya sodium hydroxide, 80-85 by ipamba nziza, impeta ibice 20-28 bya oxyethane, ibice 80-90 bya methyl chloride, ibice 16-19 bya acide glacial acetique; intambwe zihariye ni:

Intambwe yambere, mukibabi cya reaction, ongeramo toluene na isopropanol ivanze, amazi, na hydroxide ya sodium, shyushya kugeza kuri 60-80 ° C, komeza ushyushye muminota 20-40;

Intambwe ya kabiri, alkalisation: gukonjesha ibikoresho byavuzwe haruguru kuri 30-50 ° C, ongeramo ipamba inoze, utere imiti ya toluene na isopropanol ivanze, uyivange kuri 0.006Mpa, wuzuze azote kubasimbuye 3, hanyuma ukore nyuma yo gusimburwa Alkalinisation, imiterere ya alkalisation ni: igihe cya alkalisation ni amasaha 2, naho ubushyuhe bwa alkalisation ni 30 ° C kugeza 50 ° C;

Intambwe ya gatatu, etherification: nyuma ya alkalisation irangiye, reaction yimurwa kugeza 0.05-0.07MPa, hanyuma okiside ya Ethylene na methyl chloride yongerwaho muminota 30-50; icyiciro cya mbere cya etherification: 40-60 ° C, Amasaha 1.0-2.0, umuvuduko ugenzurwa hagati ya 0.15 na 0.3Mpa; icyiciro cya kabiri cya etherification: 60 ～ 90 ℃, 2.0 ～ amasaha 2.5, umuvuduko ugenzurwa hagati ya 0.4 na 0.8Mpa;

Intambwe ya kane, kutabogama: Ongeramo acide ya glacial acetike yapimwe mbere yikariso yimvura, kanda mubikoresho bya etherified kugirango bitabogamye, uzamure ubushyuhe bugere kuri 75-80 ° C kugirango imvura igwe, ubushyuhe buzamuka kuri 102 ° C, na pH agaciro ni 6 Saa munani, desolventisation irarangiye; ikigega cya desolventisation cyuzuyemo amazi ya robine akoreshwa nigikoresho cya osmose kinyuma kuri 90 ° C kugeza 100 ° C;

Intambwe ya gatanu, gukaraba centrifugal: ibikoresho byo muntambwe ya kane bishyirwa hagati binyuze muri horizontal screw centrifuge, hanyuma ibikoresho bitandukanijwe byimurirwa mu kigega cyo gukaraba cyuzuyemo amazi ashyushye mbere yo koza ibikoresho;

Intambwe ya gatandatu, yumisha centrifugal: ibikoresho byogejwe bishyikirizwa byumye binyuze muri horizontal centrifuge ya horizontal, kandi ibikoresho byumye kuri 150-170 ° C, hanyuma ibikoresho byumye bikajanjagurwa bikapakirwa.

Ugereranije na tekinoroji ya selile ya selile isanzweho, ubu bushakashatsi bwakozwe bukoresha okiside ya Ethylene nka agent ya etherification kugirango itegure hydroxyethyl methyl selulose, ifite ubushobozi bwiza bwo kurwanya ibibyimba kubera amatsinda ya hydroxyethyl. Ifite ubwiza bwimyororokere hamwe no kurwanya mildew mugihe cyo kubika igihe kirekire. Irashobora gukoreshwa aho gukoresha izindi selile.