Hydroxypropyl methylcellulosebụ cellulose ether nke sitere n'okike, nke na-adịghị emerụ ahụ mmadụ ahụ. Agbanyeghị, ihe ndị e ji owu mee na HPMC e ji eme ihe n'ụlọ ọrụ mmepụta ihe bụ ihu, n'ihi na nke a ga-enwe mmetụta nke uzuzu, ndị ọzọ adịghịkwa emerụ ahụ.
Hydroxypropyl methylcellulose anaghị egbu egbu. A na-ewere cellulose dị ka ihe dị mma ma a na-ejikwa eriri ndị sitere n'okike eme ihe site na ngwakọta alkali, mmeghachi omume grafting, ịsa, ihicha, igwepịa na usoro ndị ọzọ. Agaghị etinye ahụike ndị mmadụ n'ihe ize ndụ.
A na-emepụta Hydroxypropyl methyl cellulose, nke a makwaara dị ka hypromellose na cellulose hydroxypropyl methyl ether, site na iji owu dị ọcha dị ka ihe eji emepụta ihe ma na-enweta etherification pụrụ iche n'okpuru ọnọdụ alkaline.
Nhazi nke hydroxypropyl methylcellulose: a na-eji lye agwọ cellulose owu a nụchara anụcha na 35-40℃ maka ọkara awa, a pịpịa ya, a na-akụri cellulose ahụ, a na-emekwa agadi na 35℃ iji mee ka eriri alkali enwetara bụrụ nke a na-eme ka ọ bụrụ nke a na-eme ka ọ bụrụ nke a na-eme ka ọ bụrụ nke a na-eme ka ọ bụrụ nke a na-eme ka ọ bụrụ nke a na-eme ka ọ bụrụ nke a na-eme ka ọ dị otu. N'ime oke achọrọ. Tinye eriri alkali n'ime ketulu etherification, tinye propylene oxide na methyl chloride n'usoro, wee mee ka ọ dị ọkụ na 50-80℃ maka awa ise, nrụgide elu dịkwa ihe dị ka 1.8MPa. Mgbe ahụ, tinye oke kwesịrị ekwesị nke hydrochloric acid na oxalic acid iji saa ihe ndị ahụ na mmiri ọkụ na 90°C iji mee ka nha na olu dịkwuo elu. Mmiri mmiri site na centrifugation. Sachaa ya ka ọ bụrụ nke na-anọpụ iche. Mgbe mmiri dị n'ime ihe ahụ erughị 60%, kpoo ya na ikuku ọkụ na 130°C ruo na ọdịnaya na-erughị 5%.
HPMC nke usoro ihe mgbaze mepụtara na-eji toluene na isopropanol dị ka ihe mgbaze. Ọ bụrụ na a sachaa ya nke ọma, ọ ga-enwe ntakịrị isi fọdụrụ. Nke a bụ nsogbu nke usoro ịsa ahụ, nke anaghị emetụta ojiji ma ọ bụ nsogbu ọ bụla.
Hypromellose bụ owu a nụchara anụcha nke a na-etinyeghị mmiri mmiri iji nweta alkaline cellulose, wee sonye na ihe mgbaze, ihe ndị na-eme ka ikuku dị ọcha, toluene na isopropanol maka mmeghachi omume ikuku, a na-ewepụkwa ya, saa ya, kpọọ ya nkụ, ma gwerie ya iji nweta ngwaahịa emechara. Ọ dị njọ ma na-esi isi, ya mere ndị ọrụ nwere ike iji ya mee ihe n'ọnọdụ kwụsiri ike.
Hydroxypropyl methylcellulose kwesịrị ịṅa ntị na ihe ndị a dị na ngwa ahụ:
N'ihe gbasara ntụ ntụ apịtị, hydroxypropyl methylcellulose na-arụ ọrụ naanị na-akwado ya, ọ naghịkwa esonye na mmeghachi omume kemịkalụ ọ bụla. A na-agbakwunye ntụ ntụ apịtị ahụ na mmiri ma tinye ya na mgbidi ahụ, nke bụ mmeghachi omume kemịkalụ. N'ihi mmepụta ihe ọhụrụ, a na-ewepụ ntụ ntụ apịtị dị na mgbidi ahụ na mgbidi ma gwerie ya ka ọ bụrụ ntụ iji mepụta ihe ọhụrụ. Hydroxypropyl methylcellulose na-ejigide naanị mmiri ma na-enyere calcium isi awọ aka inwe nzaghachi ka mma, mana ọ naghị esonye na nzaghachi ọ bụla.
Hydroxypropyl Methyl Cellulose HPMC anaghị esonye na mmeghachi omume kemịkalụ ọ bụla, kama ọ na-enyere aka naanị. Tinye mmiri na ntụ ntụ apịtị ma tinye ya na mgbidi ahụ, ọ bụ mmeghachi omume kemịkalụ. N'ihi mmepụta ihe ọhụrụ, a na-ewepụ ntụ ntụ apịtị dị na mgbidi ahụ na mgbidi ma gwerie ya ka ọ bụrụ ntụ, mgbe ahụ ọ gaghị ekwe omume, n'ihi na e mepụtala ihe ọhụrụ NS. Isi ihe mejupụtara ntụ ntụ calcium isi awọ bụ: Ca(OH)2, ngwakọta nke CaO na obere CaCO3, CaO
H2O=Ca(OH)2-Ca(OH)2 CO2=CaCO3↓ H2O
Calcium isi awọ na-emepụta ihe ndị ọzọ n'okpuru mmetụta nke mmiri na CO2 n'ikuku, ebe HPMC na-ejide naanị mmiri ma na-enyere calcium isi awọ aka inwe nzaghachi ka mma. Ọ naghị esonye na nzaghachi ọ bụla.
Hydroxypropyl methyl cellulose nwere ọtụtụ ojiji. N'ụbọchị niile, ọtụtụ ngwaahịa anaghị ekewapụ onwe ha na usoro mmepụta. Mgbe ahụ, n'ime ụlọ ọrụ dị iche iche, gịnị bụ mmetụta nke hydroxypropyl methylcellulose, m ga-akọwara gị ya, ka i wee nwee ike igbochi iji ya eme ihe n'ụzọ na-ezighị ezi mgbe ị na-enweta ihe ọmụma.
Nke mbụ, n'ọrụ owuwu ụlọ, a pụrụ iwere ya dị ka ihe na-egbochi mmiri na ihe na-ejide mmiri. A na-eji ngwa agha a eme ihe, yabụ ngwa agha akọrọ niile anyị na-eji nwere òkè ya. Na mgbakwunye, n'ihe owuwu ụlọ dịka gypsum raw, plaster, na ntụ apịtị, enwere ike iji ya dị ka ihe na-ejikọ ihe, nke na-eme ka oge ọrụ dịkwuo ogologo, kamakwa ọ na-eme ka agba ahụ dị nro karịa. Na marble, taịlị seramiiki a na-arapara, ihe ịchọ mma plastik molekul, enwere ike iji ya dị ka ihe na-eme ka njikọta dịkwuo mma, wdg. A pụrụ ikwu na hydroxypropyl methyl cellulose bụ ihe a ma ama maka ọtụtụ ihe ọ na-eji arụ ọrụ ụlọ.
N'ụlọ ọrụ ndị ọzọ, dịka imepụta poselin na ite ụrọ, enwere ike iji ya dị ka ihe na-arapara maka imepụta ngwaahịa poselin na ite ụrọ; na ụlọ ọrụ lacquer na mbipụta ink, enwere ike iji ya dị ka ntụ ntụ na-adịghị ekpo ọkụ, ihe na-eme ka ihe sie ike, ihe na-eme ka ihe sie ike, ọbụlagodi n'ihi na enwere ike iji ya na ihe na-agbaze ihe ma ọ bụ mmiri gwakọtara nke ọma, enwere ike iji ya dị ka ihe na-ewepụ agba n'imepụta plastik mejupụtara molekul, yana ihe na-eme ka ihe dị nro, ihe na-eme ka ebu dịghachi ndụ, ihe na-eme ka mmanụ dị mma, wdg; na imepụta polyvinyl chloride, a na-ewere ya dị ka ntụ ntụ na-adịghị ekpo ọkụ.
A na-eji ngwaahịa ndị e ji hydroxypropyl methylcellulose mee eme ihe n'ụdị mkpụrụ osisi na akwụkwọ nri, ọgwụ, akpụkpọ anụ anụmanụ na ụlọ ọrụ ákwà. Ọ dị mma ma ghara imebi ahụ, ọ naghị akpasu akpụkpọ ahụ na akpụkpọ ahụ mmadụ iwe nke ukwuu, a pụkwara iji ya mee ihe dị ka ihe mgbakwunye nri. Agbanyeghị, n'ọnọdụ dị adị, uzuzu ya nwere ike ibute mmetọ ikuku, ọ baghịkwa uru n'ịkwado akpụkpọ ahụ ikewapụ ya n'ọkụ iji zere mgbawa.
njigide mmiri
Hydroxypropyl methylcellulose pụrụ iche maka owuwu na-ezere iji mmiri eme ihe gabiga ókè site na ihe ndị dị n'ime ya, a ga-edebekwa mmiri ahụ na plasta ruo n'ókè o kwere mee n'oge a na-etinye gypsum ahụ kpamkpam. A na-akpọ ihe onwunwe pụrụ iche a njigide mmiri ma dabara kpọmkwem na viscosity nke ngwọta hydroxypropyl methylcellulose ejiri rụọ na plasta ahụ. Ka viscosity ngwọta dị elu, otú ahụ ka ahụmịhe njide mmiri ka elu.
Mgbochi ịda mba
Enwere ike itinye ụrọ nwere ihe pụrụ iche nke na-egbochi ịcha akwa na mkpuchi dị arọ na-enweghị ịda ada, nke pụtakwara na ụrọ ahụ n'onwe ya anaghị agbanwe okike ya, ma ọ bụghị ya, ọ ga-ada ada mgbe owuwu ahụ malitere.
Belata viscosity ma mee ka owuwu dị mfe
Mgbe etinyere ọtụtụ ngwaahịa hydroxypropyl methylcellulose maka owuwu, enwere ike imepụta plasta gypsum akwụkwọ ndụ akwụkwọ ndụ nwere àgwà viscous dị nro. Mgbe a hụrụ ya ka ọ dabara adaba ma jiri ọkwa viscosity dị ala nke hydroxypropyl methylcellulose maka owuwu, ogo viscosity na-ebelata ma owuwu na-adị mfe. Agbanyeghị, njigide mmiri nke hydroxypropyl methylcellulose maka owuwu viscosity dị ala adịghị ike, ọ dịkwa mkpa ịbawanye ọnụọgụ mgbakwunye.
Ọnụego ndakọrịta plastik
Maka obere ite akọrọ a kapịrị ọnụ, ọ ka mma imepụta ite mmiri dị elu karịa, nke enwere ike ime site na itinye obere mmiri na afụ. Agbanyeghị, ọ bụrụ na oke mmiri na afụ dị ogologo, ike ya ga-ebelata.
Oge ozi: Eprel-26-2024