kimwe. Itandukaniro hagati y'ibyahinduwehydroxypropyl methylcellulose (HPMC)na hydroxypropyl methylcellulose (HPMC) yonyine
1. Ishusho: Hydroxypropyl methylcellulose HPMC isa neza kandi ifite ubucucike buke, kuva kuri 0.3-0.4g/ml; Hydroxypropyl methylcellulose yahinduwe HPMC ifite ubushyuhe bwiza kandi yumva iremereye, kandi hari itandukaniro rinini mu isura ugereranyije n'ibicuruzwa nyabyo.
2. Imiterere: Ifu ya HPMC ya hydroxypropyl methylcellulose yuzuye ifite uturemangingo tw’urukiramende munsi ya mikorosikopi cyangwa ikirahuri gikuza; mu gihe hydroxypropyl methylcellulose yahinduwe ishobora kugaragara nk'ibintu bikomeye cyangwa kristu munsi ya mikorosikopi cyangwa ikirahuri gikuza.
3. Impumuro mbi: Hydroxypropyl methylcellulose HPMC ntabwo ishobora guhumurirwa impumuro mbi ya ammonia, starch na alcohol; Hydroxypropyl methylcellulose HPMC ishobora guhumurirwa impumuro mbi z'ubwoko bwose, nubwo yaba idafite uburyohe, yumva iremereye.
4. Umuti w'amazi: umuti w'amazi wa hydroxypropyl methylcellulose HPMC usobanutse neza, utanga urumuri rwinshi, amazi agumana ≥ 97%; umuti w'amazi wa hydroxypropyl methylcellulose HPMC uvanze ni umukungugu, kandi umuti w'amazi ugumana 80% biragoye kuwugeraho.
Icya kabiri, uburyo hydroxypropyl methylcellulose HPMC igumana amazi, bitandukanya ibyiza n'ibibi:
Kubika amazi muri ether ya methyl cellulose mu gihe cy'ubushyuhe bwinshi ni ikimenyetso cy'ingenzi cyo gutandukanya ubwiza bwa ether ya methyl cellulose. Ibintu nk'ubushyuhe bw'umwuka, ubushyuhe n'umuvuduko w'umuyaga bigira ingaruka ku gipimo cyo guhindagurika kw'amazi muri sima na gypsum. Kubwibyo, mu bihe bitandukanye, hari itandukaniro mu ngaruka zo kubika amazi ku bicuruzwa bifite HPMC zingana. Mu buryo bwihariye, ingaruka zo kubika amazi muri slurry zishobora guhindurwa no kongera cyangwa kugabanya ingano ya HPMC. Ibicuruzwa byiza bya hydroxypropyl methylcellulose HPMC bishobora gukemura neza ikibazo cyo kubika amazi mu gihe cy'ubushyuhe bwinshi.
Methylcellulose nziza cyane ishobora gukwirakwizwa mu buryo bumwe kandi neza mu bintu bikozwe muri sima no muri gypsum, igapfunyika uduce twose tw’ingenzi, igakora agahu gatose, ubushuhe mu gice cyo hasi bugasohoka buhoro buhoro igihe kirekire, kandi inorganic. Uburyo bwo guhumeka bw’ibintu bikozwe muri gel butuma ibintu bikomera kandi bigakomera. Hydroxypropyl methylcellulose HPMC ifite ubuziranenge bwo hejuru, uburinganire bwayo ni bwiza cyane, amatsinda yayo ya methoxy na hydroxypropoxy akwirakwizwa ku buryo bungana ku muyoboro wa cellulose, ishobora kongera ogisijeni ku migozi ya hydroxyl na ether. Ubushobozi bwa atome bwo kwihuza n’amazi mu gukora imigozi ya hydrogen buhindura amazi yigenga mu mazi, bityo bukagenzura neza imyuka y’amazi iterwa n’ikirere gishyushye cyane kandi bukagera ku kubika amazi menshi.
Kubwibyo, mu bwubatsi bushyuha cyane mu mpeshyi, kugira ngo amazi agerweho, ni ngombwa kongeramo ibikoresho byiza bya HPMC mu bwinshi buhagije hakurikijwe formula, bitabaye ibyo, amazi ntahagije azaba ahari, imbaraga nke, gucikamo ibice, gupfuka no gushonga bitewe n'ibibazo byumye cyane, ariko nanone byongera ingorane z'abakozi mu bwubatsi. Uko ubushyuhe bugenda bugabanuka, ingano y'amazi HPMC yongewemo ishobora kugabanuka buhoro buhoro, kandi ingaruka imwe yo kubika amazi ishobora kugerwaho.
3. Gushonga kwa hydroxypropyl methylcellulose HPMC
Mu nganda z'ubwubatsi, hydroxypropyl methylcellulose HPMC ikunze gushyirwa mu mazi adafite aho ahuriye n'amazi, kandi umusaruro wa HPMC ushongeshwa wonyine kugira ngo hamenyekane igipimo cyo gusenyuka. Nyuma yo gushyirwa mu mazi adafite aho ahuriye n'amazi gusa, umusaruro wihuta wihuta udatatanye ni umusaruro udatunganywa n'amazi; nyuma yo gushyirwa mu mazi adafite aho ahuriye n'amazi gusa, umusaruro ushobora gutatana ntufatanye ni umusaruro utunganywa n'amazi. Iyo hydroxypropyl methylcellulose HPMC idatunganyijwe ishongeshwa yonyine, agace kayo kamwe karashonga vuba kandi gakora agahu vuba, bigatuma amazi atakinjira mu tundi duce, bigatuma habaho kwihuza no guterana, ubu byitwa gushonga buhoro buhoro ku isoko.
Uduce twa hydroxypropyl methylcellulose HPMC two mu bwoko bwa HPMC twatunganyijwe ku butaka, mu mazi adafite aho ahuriye, uduce twihariye dushobora gukwirakwira nta kwivanga, ariko ubukana bw'umusaruro ntibuhita butera. Nyuma yo kwinika mu mazi igihe runaka, imiterere y'imiti yo gutunganya ubuso irangirika, kandi amazi ashobora gushonga uduce twa HPMC. Muri iki gihe, uduce twa HPMC tuba twakwirakwiriye kandi twinjiyemo amazi ahagije, bityo igikoresho ntikizaterana cyangwa ngo giterane nyuma yo gushonga. Umuvuduko wo gukwirakwira no gushonga biterwa n'urwego rwo gutunganya ubuso. Iyo gutunganya ubuso ari gato, umuvuduko wo gukwirakwira ugenda buhoro kandi umuvuduko wo gufatana ugenda wihuta; mu gihe igikoresho gifite imiterere yimbitse yo gutunganya ubuso gifite umuvuduko wo gukwirakwira no gufatana buhoro. Niba ushaka gutuma uru ruhererekane rw'ibicuruzwa rushonga vuba muri iyi mimerere, ushobora kugabanya ingano nto y'ibintu bya alkaline iyo bishongeshejwe byonyine. Isoko ririho ubu rikunze kwitwa ibicuruzwa byihuse. Ibiranga HPMC zo mu bwoko bwa HPMC zo mu bwoko bwa HPMC ni ibi bikurikira: mu gisubizo cy'amazi, uduce dushobora gukwirakwira hamwe, dushobora gushonga vuba muri alkaline, kandi tugashonga buhoro buhoro muri aside.
Ibiranga hydroxypropyl methylcellulose HPMC itavuwe ni ibi bikurikira: agace kamwe gashonga vuba cyane mu miterere ya aside, alkaline, na neutre, ariko ntigashobora gukwirakwira hagati y’utundi duce turi mu mazi, bigatuma habaho kwishyira hamwe no guterana. Mu mikorere nyayo, nyuma yo gukwirakwira kw’uru rukurikirane rw’ibicuruzwa n’utundi duce dukomeye nka ifu ya rubber, sima, umucanga, nibindi, umuvuduko wo gusenyuka uba wihuta cyane, kandi nta guterana cyangwa guterana bibaho. Iyo bibaye ngombwa gushonga ibicuruzwa bya HPMC ukwabyo, uru rukurikirane rw’ibicuruzwa rugomba gukoreshwa witonze, kuko bizaterana kandi bigafatana. Niba bibaye ngombwa gushonga ibicuruzwa bya hydroxypropyl methylcellulose HPMC bitavuwe ku buso ukwabyo, bigomba gushonganywa neza n’amazi ashyushye ya 95°C, hanyuma bigakonjeshwa kugira ngo bishonge.
Mu mikorere nyayo y'umusaruro, uru ruhererekane rw'ibicuruzwa rukunze gushonga nyuma yo gukwirakwizwa n'ibindi bikoresho bikomeye mu gihe cy'ubushyuhe, kandi igipimo cyo gushonga kwabyo ntabwo gitandukanye n'ic'ibicuruzwa bitavuwe. Birakwiriye kandi gukoreshwa mu bicuruzwa bishonga byonyine, nta gufunga cyangwa gupfunyika. Icyitegererezo cyihariye cy'ibicuruzwa gishobora gutoranywa hakurikijwe igipimo cyo gushonga gisabwa n'ubwubatsi.
Mu gihe cyo kubaka, byaba ari sima cyangwa plaque ishingiye kuri gypsum, inyinshi muri zo ni alkaline systems, kandi ingano ya HPMC yongerwamo ni nto cyane, ishobora gukwirakwizwa neza muri utwo duce. Iyo amazi yongewemo,HPMCizashonga vuba.
Igihe cyo kohereza: 26 Mata 2024