Hydroxypropyl methylcellulose (HPMC) ni ionic, amazi-soluble selile yivanze na ether.Kugaragara ni umweru kugeza ifu yumuhondo gato cyangwa ibikoresho bya granulaire, uburyohe, impumuro nziza, idafite uburozi, imiti ihamye, kandi ishonga mumazi kugirango bibe igisubizo cyiza, kiboneye kandi kibonerana.Imwe mu miterere yingenzi ya hydroxypropyl methylcellulose mukoresha ni uko byongera ubwiza bwamazi.Ingaruka yibyibushye biterwa nurwego rwa polymerisiyasi (DP) yibicuruzwa, kwibumbira hamwe kwa selile ya ether mu gisubizo cyamazi, igipimo cyogosha, nubushyuhe bwumuti.N'ibindi bintu.
01
Ubwoko bwamazi ya HPMC igisubizo cyamazi
Muri rusange, imihangayiko y'amazi yo gutemba irashobora kugaragazwa nkigikorwa cyikigereranyo cyogosha gusa ƒ (γ), mugihe cyose kidashingiye kumwanya.Ukurikije imiterere ya ƒ (γ), amazi ashobora kugabanywamo ubwoko butandukanye, aribwo: Amazi ya Newtonian, flulatant fluid, pseudoplastique fluide na Bingham.
Ethers ya selile igabanijwemo ibyiciro bibiri: imwe ni ionic selulose ether iyindi ni ionic selulose ether.Kuri rheologiya yubwoko bubiri bwa selile ethers.SC Naik n'abandi.yakoze ubushakashatsi bwuzuye kandi bugereranya kuri hydroxyethyl selulose na sodium carboxymethyl selulose ibisubizo.Ibisubizo byerekanaga ko ibisubizo byombi bitari ionic selulose ether ibisubizo hamwe na ionic selulose ether ibisubizo byari pseudoplastique.Urujya n'uruza, ni ukuvuga imigezi itari Newtonian, wegera amazi ya Newtonian gusa yibitekerezo bike.Pseudoplastique ya hydroxypropyl methylcellulose igisubizo igira uruhare runini mubikorwa.Kurugero, iyo ushyizwe mubitambaro, bitewe nuburyo bwogosha buranga ibisubizo byamazi, ubwiza bwumuti buragabanuka hamwe no kwiyongera kwikigero cyogosha, ibyo bikaba bifasha gukwirakwiza kimwe mubice bya pigment, kandi bikongerera ubwiza bwikibiriti .Ingaruka nini cyane;mugihe uruhutse, ubwiza bwumuti ni bunini cyane, burinda neza gushira ibice bya pigment muri coating.
02
Uburyo bwo Kwipimisha HPMC
Ikimenyetso cyingenzi cyo gupima ingaruka zibyibushye bya hydroxypropyl methylcellulose nubukonje bugaragara bwumuti wamazi.Uburyo bwo gupima ibintu bigaragara neza mubusanzwe burimo uburyo bwa capillary viscosity uburyo, uburyo bwo kuzunguruka bwizunguruka hamwe nuburyo bwo kugwa kumupira.
aho: ni ibigaragara bigaragara, mPa s;K ni viscometer ihoraho;d ni ubucucike bw'icyitegererezo kuri 20/20 ° C;t nigihe cyo gukemura kunyura mugice cyo hejuru cya viscometer kugeza kumurongo wo hasi, s;Igihe amavuta asanzwe anyura muri viscometer arapimwa.
Nyamara, uburyo bwo gupima na capillary viscometer burarenze ibibazo.Ubusembwa bwa ethers nyinshi ya selile biragoye kubisesengura ukoresheje capillary viscometer kuko ibisubizo bikubiyemo urugero rwibintu bitangirika bigaragarira gusa mugihe capillary viscometer ihagaritswe.Kubwibyo, abayikora benshi bakoresha viscometer zizunguruka kugirango bagenzure ubuziranenge bwa hydroxypropyl methylcellulose.Viscometer ya Brookfield ikoreshwa mubihugu byamahanga, naho viscometer ya NDJ ikoreshwa mubushinwa.
03
Ingaruka yibintu bya HPMC
3.1 Isano nu rwego rwo guteranya
Iyo ibindi bipimo bidahindutse, ubwiza bwumuti wa hydroxypropyl methylcellulose buringaniye nurwego rwa polymerisiyasi (DP) cyangwa uburemere bwa molekile cyangwa uburebure bwurunigi, kandi byiyongera hamwe no kwiyongera kurwego rwa polymerisation.Ingaruka zigaragara cyane mugihe cya polimerisiyonike nkeya kuruta iyo murwego rwo hejuru rwa polymerisation.
3.2 Isano iri hagati yubukonje no kwibanda
Ubukonje bwa hydroxypropyl methylcellulose bwiyongera hamwe no kwiyongera kwibicuruzwa byibisubizo mumazi.Ndetse impinduka ntoya yibitekerezo bizatera impinduka nini mubwiza.Hamwe na viscosity nominal ya hydroxypropyl methylcellulose Ingaruka zimpinduka yibisubizo byibisubizo kumitsi yibisubizo biragaragara kandi biragaragara.
3.3 Isano iri hagati yubukonje nigipimo cyogosha
Hydroxypropyl methylcellulose igisubizo cyamazi gifite umutungo wo kogosha.Hydroxypropyl methylcellulose yubwiza butandukanye bwizina yateguwe mubisubizo byamazi 2%, kandi ubwiza bwayo mubipimo bitandukanye byapimwe.Ibisubizo nibi bikurikira Nkuko bigaragara ku gishushanyo.Ku gipimo gito cyogosha, ubwiza bwumuti wa hydroxypropyl methylcellulose ntabwo bwahindutse cyane.Ubwiyongere bwikigero cyogosha, ubwiza bwumuti wa hydroxypropyl methylcellulose hamwe nubwinshi bwizina ryizina ryaragabanutse cyane, mugihe igisubizo gifite ubukonje buke kitagabanutse kuburyo bugaragara.
3.4 Isano iri hagati yubukonje nubushyuhe
Ubukonje bwumuti wa hydroxypropyl methylcellulose bigira ingaruka cyane kubushyuhe.Mugihe ubushyuhe bwiyongera, ubwiza bwumuti buragabanuka.Nkuko bigaragara ku gishushanyo, cyateguwe mu gisubizo cy’amazi gifite ubunini bwa 2%, kandi hapimwa ihinduka ry’imitsi hamwe n’ubwiyongere bw’ubushyuhe.
3.5 Ibindi bintu bigira ingaruka
Ubukonje bwumuti wamazi wa hydroxypropyl methylcellulose nabwo bugira ingaruka ku nyongeramusaruro mu gisubizo, pH agaciro k'igisubizo, no kwangirika kwa mikorobe.Mubisanzwe, kugirango tubone imikorere myiza yubukonje cyangwa kugabanya ikiguzi cyo gukoresha, birakenewe ko hongerwaho abahindura imvugo, nkibumba, ibumba ryahinduwe, ifu ya polymer, etarike ether na aliphatic copolymer, kubisubizo byamazi ya hydroxypropyl methylcellulose., na electrolytite nka chloride, bromide, fosifate, nitrate, nibindi nabyo birashobora kongerwaho igisubizo cyamazi.Izi nyongeramusaruro ntizizagira ingaruka gusa kumiterere yumuti wumuti wamazi, ahubwo izagira ingaruka no mubindi bikorwa bya hydroxypropyl methylcellulose nko kubika amazi., kwihanganira sag, nibindi
Ubukonje bwumuti wamazi wa hydroxypropyl methylcellulose ntushobora kwibasirwa na aside na alkali, kandi muri rusange ihagaze neza hagati ya 3 na 11. Irashobora kwihanganira urugero runaka rwa acide nkeya, nka acide formique, acide acike, aside fosifori , aside ya boric, aside citric, nibindi, ariko, aside yibanze izagabanya ubukonje.Ariko soda ya caustic, hydroxide ya potasiyumu, amazi ya lime, nibindi ntacyo bigira kuri yo.Ugereranije nizindi ethers ya selile, hydroxypropyl methylcellulose igisubizo cyamazi gifite umutimanama mwiza wa mikorobe, impamvu nyamukuru nuko hydroxypropyl methylcellulose ifite amatsinda ya hydrophobique afite urwego rwo hejuru rwo gusimbuza no gukumira inzitizi zamatsinda Nyamara, kubera ko reaction yo gusimbuza ubusanzwe idahuye, igice cya anhydroglucose. isenyuka byoroshye na mikorobe, bikaviramo kwangirika kwa molekile ya selile na selile.Imikorere nuko bigaragara ko viscosity yibisubizo byamazi bigabanuka.Niba ari ngombwa kubika igisubizo cyamazi ya hydroxypropyl methylcellulose igihe kirekire, birasabwa kongeramo urugero rwimiti igabanya ubukana kugirango viscike idahinduka cyane.Mugihe uhisemo imiti igabanya ubukana, imiti igabanya ubukana cyangwa fungiside, ugomba kwitondera umutekano, ugahitamo ibicuruzwa bidafite ubumara bwumubiri wumuntu, bifite imiterere ihamye kandi bidafite impumuro nziza, nka DOW Chem's AMICAL fungicides, CANGUARD64, imiti ya bagiteri ya FUELSAVER. nibindi bicuruzwa.irashobora kugira uruhare ruhuye.
Igihe cyo kohereza: Ukwakira-20-2022