Nigute methyl hydroxyethyl selile yateguwe?

Amavu n'amavuko

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. Cellulose ether ibicuruzwa nka sodiumcarboxymethyl selulose (CMC), Ethyl selulose (EC), hydroxyethyl selulose (HEC), hydroxypropyl selulose (HPC), methyl hydroxyethyl selulose (MHEC)namethyl hydroxypropyl selulose (MHPC)hamwe na ether ya selile izwi nka "inganda monosodium glutamate" kandi yagiye ikoreshwa cyane mu gucukura peteroli, kubaka, gutwikira, ibiryo, imiti n'imiti ya buri munsi.

Hydroxyethyl methyl selulose (MHPC) 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. Bitewe nubuso bukora bwibikorwa byamazi yo mumazi, birashobora gukoreshwa nkibikoresho birinda 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: Gushonga mumazi hamwe na solge organic. HEMC irashobora gushonga mumazi akonje. Kwibanda kwayo kwinshi kugenwa gusa nubwiza. Gukemura biratandukanye nubwiza. Hasi ya viscosity, niko gukomera.

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5. Ubusembure bwa metabolike numunuko muke nimpumuro nziza: HEMC ikoreshwa cyane mubiribwa nubuvuzi kuko itazahinduka kandi ifite impumuro nziza nimpumuro nziza.

6. Kurwanya ibibyimba: HEMC ifite imbaraga zo kurwanya indwara yoroheje kandi ihagaze neza mugihe cyo kubika igihe kirekire.

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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 ibikorwa, birashobora gukoreshwa nkibikoresho birinda colloidal, emulifier na dispersant. Hydroxyethyl methylcellulose igisubizo cyamazi gifite hydrophilique nziza kandi nikintu cyiza cyo gufata amazi.

2. Hateguwe irangi ryoroshye cyane ryubutabazi, rikozwe mubikoresho fatizo 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; Shingiro ya selile yamazi yumuti 30-40g; lignocellulose igisubizo cyamazi 10-20g; imfashanyo yo gukora firime 4-6g; antiseptic na fungiside 1.5-2.5g; gutatanya 1.8-2.2g; umukozi woza 1.8-2.2g; 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.

Kwitegura

Uburyo bwo gutegura hydroxyethyl methyl selulose, uburyo nuko ipamba itunganijwe ikoreshwa nkibikoresho fatizo, naho okiside ya Ethylene ikoreshwa nka etherification yo gutegura hydroxyethyl methyl selulose. Ibice byuburemere bwibikoresho fatizo byo gutegura hydroxyethyl methylcellulose nibi bikurikira: ibice 700-800 bya toluene na isopropanol bivanze nkibishishwa, ibice 30-40 byamazi, ibice 70-80 bya hydroxide ya sodium, ibice 80-85 bya pamba itunganijwe, impeta ibice 20-28 bya oxy etan, 80-90 bya methyl chloride, 16-19; 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 itunganijwe, utere imiti ya toluene na isopropanol ivanze, vacuumize kuri 0.006Mpa, wuzuze azote kubasimbuye 3, hanyuma ukore nyuma yo gusimburwa na Alkalinisation, ibihe bya alkalisation ni amasaha 2 °, na ubushyuhe bwa alkalisation ni 30 ° C kugeza kuri 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 bugere kuri 102 ° C, kandi agaciro ka pH kagaragaye ko ari 6 Saa munani, desolventisation irangiye; 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 nkumuti wa etherification kugirango utegure hydroxyethyl methyl selulose, ifite imiti irwanya indwara kubera ko irimo amatsinda ya hydroxyethyl. Ifite ubwiza bwimyororokere hamwe no kurwanya mildew mugihe cyo kubika igihe kirekire. Irashobora gukoreshwa aho gukoresha izindi selile.