Hydroxypropyl methylcellulosebụ cellulose ether na-emekarị, nke na-adịghị emerụ ahụ mmadụ. Otú ọ dị, ihe ndị e ji emepụta owu na HPMC ndị a na-eji eme ihe n'ụlọ ọrụ ahụ bụ ihu, n'ihi na nke a ga-enwe mmetụta nke uzuzu, na ndị ọzọ adịghị emerụ ahụ.
Hydroxypropyl methylcellulose adịghị egbu egbu. A na-ewere cellulose dị mma ma na-edozi ya site na iji eriri na-emekarị site na ngwakọta alkali, nzaghachi grafting, ịsa, ihicha, egweri na usoro ndị ọzọ. Agaghị etinye ahụike ndị mmadụ n'ihe egwu.
Hydroxypropyl methyl cellulose, nke a makwaara dị ka hypromellose na cellulose hydroxypropyl methyl ether, bụ nke a na-eme site na iji cellulose dị ọcha nke ukwuu dị ka akụrụngwa na ịnweta etherification pụrụ iche n'okpuru ọnọdụ alkaline.
Njikọ nke hydroxypropyl methylcellulose: a nụchara anụcha cellulose owu a nụchara anụcha na-emeso ya na lye na 35-40 ℃ maka ọkara otu awa, squeezed, na cellulose na-echi ọnụ n'ala, na ịka nká na-rụrụ na 35 ℃ na-eme ka enwetara alkali fiber uniformly polymerized. N'ime oke achọrọ. Tinye eriri alkali n'ime kettle etherification, gbakwunye propylene oxide na methyl chloride n'usoro, ma etherify na 50-80 ℃ maka 5h, na nrụgide elu dị ihe dịka 1.8MPa. Mgbe ahụ tinye ego kwesịrị ekwesị nke hydrochloric acid na oxalic acid iji sachaa ihe ndị ahụ na mmiri ọkụ na 90 Celsius C iji mee ka nha na ụda dịkwuo elu. Wepu mmiri site na centrifugation. Swash na-anọpụ iche. Mgbe mmiri dị n'ime ihe dị n'ime ihe na-erughị 60%, kpoo ya na iyi nke ikuku ọkụ na 130 ° C na ọdịnaya nke na-erughị 5%.
HPMC mepụtara site na usoro mgbaze na-eji toluene na isopropanol dị ka ihe mgbaze. Ọ bụrụ na a na-asa ya nke ọma, ọ ga-enwetụ isi ísì. Nke a bụ nsogbu nke usoro ịsa ahụ, nke na-adịghị emetụta ojiji ma ọ bụ nsogbu ọ bụla.
Hypromellose bụ owu a nụchara anụcha nke na-adịkarịghị etinye ya na mmiri mmiri iji nweta alkaline cellulose, wee sonye na ihe mgbaze, ndị na-ahụ maka etherification, toluene na isopropanol maka mmeghachi omume etherification, a na-ewepụ ya, saa ya, akpọnwụọ ma gwerie ya iji nweta ngwaahịa emechara. Ọ dị njọ ma na-esi ísì, yabụ ndị ọrụ nwere ike iji ya na ọnọdụ kwụsiri ike.
Hydroxypropyl methylcellulose kwesịrị ịṅa ntị na ihe ndị a na ngwa:
Na mmetụta nke apịtị ntụ ntụ, hydroxypropyl methylcellulose na-arụ ọrụ nkwado naanị, ọ dịghị etinye aka na mmeghachi omume kemịkal ọ bụla. A na-agbakwunye ntụ ntụ apịtị na mmiri ma tinye ya na mgbidi, nke bụ mmeghachi omume kemịkal. N'ihi nhazi nke ihe ọhụrụ, a na-ewepụ ntụ ntụ nke dị na mgbidi ahụ na mgbidi wee ghọọ ntụ ntụ iji mepụta ihe ọhụrụ. Hydroxypropyl methylcellulose na-ejigide mmiri naanị ma na-enyere calcium isi awọ aka inwe nzaghachi ka mma, mana ọ naghị etinye aka na nzaghachi ọ bụla.
Hydroxypropyl Methyl Cellulose HPMC anaghị eso na mmeghachi omume kemịkal ọ bụla, kama ọ na-enyere aka. Tinye mmiri na ntụ ntụ ntụ ma tinye ya na mgbidi, ọ bụ mmeghachi omume kemịkal. N'ihi nhazi nke ihe ọhụrụ, a na-ewepụ ntụ ntụ na mgbidi ahụ na mgbidi na ala n'ime ntụ ntụ, mgbe ahụ, ọ gaghị ekwe omume, n'ihi na e mepụtala ihe ọhụrụ NS. Isi ihe dị na 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 na ikuku, ebe HPMC na-ejigide mmiri naanị ma na-enyere calcium isi awọ aka inwe nzaghachi ka mma. Ọ naghị eso na nzaghachi ọ bụla.
Hydroxypropyl methyl cellulose nwere ọtụtụ ojiji. Na ndụ kwa ụbọchị, ọtụtụ ngwaahịa enweghị ikewapụ na usoro mmepụta ihe. Mgbe ahụ, na ụlọ ọrụ dị iche iche, gịnị bụ mmetụta nke hydroxypropyl methylcellulose, m ga-akọwara gị ya, ka i wee gbochie iji ya eme ihe mgbe ị na-enweta ihe ọmụma.
Nke mbụ, na ụlọ ọrụ ihe owuwu, enwere ike iwere ya dị ka onye na-eme ka ọ bụrụ ihe na-eme ka ọ bụrụ onye na-ejigide mmiri. Ngwa ngwa ngwa agha na-agbapụta, yabụ ngwa ngwa niile akọrọ anyị na-eji nwere òkè ya. Tụkwasị na nke ahụ, na ihe ndị e ji ewu ụlọ dị ka gypsum raw, plasta, na ntụ ntụ, a pụrụ iji ya mee ihe dị ka ihe nkedo, nke ọ bụghị nanị na-agbatị oge maka ịrụ ọrụ, kamakwa na-eme ka agba ahụ dịkwuo mma. Na marble, nrapado ceramic tiles, molecular compound plastic decorations, ọ nwere ike ji mee ihe dị ka adhesion enhancer, wdg. Ọ nwere ike na-ekwu na hydroxypropyl methyl cellulose bụ ihe kasị ama maka versatility na ụlọ ihe.
N'ụlọ ọrụ ndị ọzọ, dị ka poselin na mmepụta ihe, enwere ike iji ya dị ka ihe nrapado maka mmepụta nke poselin na ngwaahịa ite; na ụlọ ọrụ lacquer na mbipụta ink, enwere ike iji ya dị ka ntụ ntụ na-adịghị ahụkebe, thickener, stabilizer, na ọbụna n'ihi na ọ nwere ike ijikọta ya na organic Solvent ma ọ bụ mmiri na-agwakọta nke ọma, a pụkwara iji ya mee ihe dị ka onye na-ese ihe na-emepụta ihe na-emepụta plastik. , yana ndị na-eme ka ọ dị nro, ndị na-ahapụ ebu, mmanụ mmanu, wdg; na mmepụta nke polyvinyl chloride, a na-ewere ya dị ka ntụ ntụ na-adịghị mma.
A na-eji ngwaahịa hydroxypropyl methylcellulose mee ihe na ịdị ọhụrụ nke mkpụrụ osisi na akwụkwọ nri, ọgwụ, akpụkpọ anụ na ụlọ ọrụ akwa. Ọ dị mma na nke na-adịghị egbu egbu, ọ bụghị nke ukwuu na-akpasu mmadụ iwe na akpụkpọ anụ mucous na akpụkpọ anụ, na ọbụna nwere ike iji dị ka ihe mgbakwunye nri. Otú ọ dị, n'ọnọdụ dị adị nke okwu ahụ, ájá ya nwere ike ime ka ikuku na-emetọ ya, ọ dịghịkwa uru maka nlekọta akpụkpọ ahụ iji wepụ ya na ọkụ iji zere mgbawa.
njide mmiri
Hydroxypropyl methylcellulose pụrụ iche maka owuwu na-ezere iji mmiri na-emebiga ihe ókè site na mkpụrụ, na mmiri kwesịrị idobe ya na plasta dị ka o kwere mee n'oge a na-edozi gypsum kpamkpam. A na-akpọ ihe onwunwe pụrụ iche a na-ejide mmiri ma na-adaba na viscosity nke hydroxypropyl methylcellulose ngwọta nke eji arụ ọrụ na plasta. Nke dị elu viscosity ngwọta, otú ahụ ka ahụmahụ njigide mmiri dị elu.
Anti-sagging
Enwere ike itinye ngwa agha ahụ nwere ihe pụrụ iche nke mgbochi sagging na mkpuchi dị arọ na-enweghị mgbagha, nke pụtakwara na ngwa agha ahụ n'onwe ya adịghị agbanwe okike ya, ma ọ bụghị ya, ọ ga-agbada mgbe ụlọ ahụ malitere.
Belata viscosity ma kwado ihe owuwu
Mgbe ịgbakwunye ngwaahịa hydroxypropyl methylcellulose dị iche iche, a ga-emepụta plasta gypsum green nwere àgwà viscous dị nro. Mgbe a na-ahụta na ọ bụ ihe kwesịrị ekwesị ma na-eji ọkwa dị ala-viscosity nke hydroxypropyl methylcellulose a na-ewu ihe, a na-ebelata ogo viscosity ma na-ewu ụlọ na-adị mfe. Otú ọ dị, njide mmiri nke hydroxypropyl methylcellulose maka ihe owuwu viscosity dị ntakịrị adịghị ike, ọ dịkwa mkpa ịbawanye ụba nke mgbakwunye.
Ọnụọgụ ndakọrịta plastik
Maka ọnụ ọgụgụ a na-akwụ ụgwọ nke ụrọ akọrọ, ọ na-adịkwu ọnụ ahịa iji mepụta oke mmiri mmiri dị elu, nke a ga-enweta site n'ịgbakwunye obere mmiri na afụ. Otú ọ dị, ọ bụrụ na ọnụ ọgụgụ nke mmiri na afụ dị ogologo, ike na-emebi.
Oge nzipu: Eprel-26-2024