Ọbara hydroxidepropyl methyl cellulose (HPMC) maka akpụkpọ ahụ a kpụrụ akpụ?
– azịza: Akpụkpọ ahụ a na-akpọ Skim dị mma nke ukwuu. HPMC 100000cps, ụfọdụ ka ogologo karịa ihe achọrọ na ngwa agha, chọrọ ikike iji 150000cps. Ọzọkwa, HPMC bụ ọrụ kachasị mkpa nke idobe mmiri, wee soro ya mee ka ọ dị nkọ. Na akpụkpọ ahụ a na-akpọ Skim, ọ bụrụhaala na idobe mmiri dị mma, viscosity dị ala (7-80000), o nwekwara ike, n'ezie, viscosity dị ukwuu, idobe mmiri dị mma karịa, mgbe viscosity karịrị 100, viscosity nke idobe mmiri adịghị oke.
Kedu ihe bụ isi ihe na-egosi teknụzụ nke hydroxypropyl methyl cellulose (HPMC)?
Azịza: Ọdịnaya Hydroxypropyl na viscosity, ọtụtụ ndị ọrụ na-eche maka ihe ngosi abụọ a. Ọdịnaya Hydroxypropyl dị elu, resistence mmiri na-aka mma n'ozuzu. Viscosity, residency mmiri, relative (mana ọ bụghị zuru oke) dịkwa mma, viscosity, simenti smor ka mma iji ụfọdụ.
Gịnị bụ ihe ndị bụ isi e ji arụ ọrụ na Hydroxypropyl methyl cellulose (HPMC)?
Azịza: hydroxypropyl methyl cellulose (HPMC) bụ isi ihe eji emepụta ihe: owu a nụchara anụcha, chloromethane, propylene oxide, ihe ndị ọzọ eji emepụta ihe, mbadamba alkali, acid, toluene, isopropyl alcohol na ihe ndị ọzọ.
HPMC na Skim coat na ngwa, ọrụ bụ isi, ma ọ bụ kemịkal?
Azịza: HPMC na mkpuchi Skim, ịka nká, mmiri na ịrụ ọrụ atọ. Ịkpọ nkụ: enwere ike ime ka cellulose sie ike ruo mgbe ọ ga-akwụsị, ka ihe ngwọta ahụ wee dịrị otu elu na ala nke ọrụ mgbochi mmiri kwụgidere. Ịdobe mmiri: mee ka mkpuchi Skim kpọọ nkụ nwayọ nwayọ, calcium isi awọ na-enyere aka n'ọrụ mmeghachi omume mmiri. Nhazi: mmanụ cellulose, nwere ike ime ka mkpuchi Skim nwee ezigbo owuwu. HPMC anaghị esonye na mmeghachi omume kemịkalụ ọ bụla, mana ọ na-arụ naanị ọrụ nkwado. Akpụkpọ Skim na mmiri, n'elu mgbidi, bụ mmeghachi omume kemịkalụ, n'ihi mmepụta nke ihe ọhụrụ, mgbidi nke Skim na-ekpuchi site na mgbidi, gwerie ya ka ọ bụrụ ntụ, wee jiri ya, ọ dịghị mma, n'ihi na emepụtala ihe ọhụrụ (calcium carbonate). Isi ihe mejupụtara ntụ ntụ calcium isi awọ bụ: Ca(OH)2, CaO na obere ngwakọta CaCO3, CaO+H2O=Ca(OH)2 – Ca(OH)2+CO2=CaCO3↓+H2O calcium isi awọ na mmiri na ikuku n'okpuru ọrụ nke CO2, nhazi nke calcium carbonate, na HPMC naanị mmiri, calcium isi awọ na-enyere aka ka mma, nke ya esonyeghị na mmeghachi omume ọ bụla.
HPMC bụ cellulose ether nke na-abụghị ionic, yabụ gịnị bụ non-ionic?
A: N'ozuzu, ihe ndị na-abụghị ion bụ ihe ndị na-anaghị ion n'ime mmiri. Ionization bụ nkewa nke electrolyte n'ime ion ndị na-agagharị agagharị n'ime ihe mgbaze pụrụ iche, dị ka mmiri ma ọ bụ mmanya. Dịka ọmụmaatụ, nnu anyị na-eri kwa ụbọchị - sodium chloride (NaCl) na-agbaze na mmiri ma na-agbanwe ion iji mepụta ion sodium na-agagharị agagharị (Na+) nwere chajị dị mma na ion chloride (Cl) nwere chajị na-adịghị mma. Ya bụ, HPMC dị na mmiri anaghị ekewa n'ime ion ndị a na-agbaze, kama ọ dị ka molekul.
Kedu ihe metụtara okpomọkụ gelation nke hydroxypropyl methyl cellulose?
Azịza: Okpomọkụ jel nke HPMC metụtara ọdịnaya methoxyl. Ka ọdịnaya methoxyl dị ala, otú ahụ ka okpomọkụ jel dị elu.
Ntụ ntụ akpụkpọ anụ na HPMC enweghị mmekọrịta ọ bụla?
Azịza: Ntụ ntụ ntụ a kpụchara akpụcha na ịdị mma nke calcium ntụ nwere nnukwu mmekọrịta, HPMC enweghịkwa njikọ buru ibu. Ọdịnaya calcium dị ala nke calcium isi awọ na oke CaO na Ca(OH)2 na calcium isi awọ ga-eme ka ntụ ntụ daa. Ọ bụrụ na enwere mmekọrịta na HPMC, mgbe ahụ nchekwa mmiri nke HPMC ga-akpatakwa mfu ntụ.
Kedu ihe dị iche n'etiti mmiri oyi na-agbaze agbaze na hydroxypropyl methyl cellulose na-agbaze agbaze na-ekpo ọkụ n'usoro mmepụta?
– Azịza: Ụdị ngwọta mmiri oyi HPMC bụ mgbe a gwọchara glyoxal surface surface, tinye ya na mmiri oyi gbasaa ngwa ngwa, mana ọ gbazeghị nke ọma, viscosity ahụ na-agbaze, agbazekwa. A naghị eji glyoxal agwọ ụdị thermosoluble ahụ n'elu. Ọnụọgụ glyoxal buru ibu, mgbasa ahụ na-agba ọsọ, mana viscosity ahụ dị nwayọ, ọnụọgụ ahụ pere mpe, n'ụzọ megidere nke ahụ.
Gịnị ka hydroxypropyl methyl cellulose (HPMC) na-esi isi?
– Azịza: HPMC nke e ji usoro ihe mgbaze mepụta bụ nke toluene na isopropyl alcohol. Ọ bụrụ na ịsa ahụ adịghị mma nke ukwuu, a ga-enwe ntakịrị ụtọ fọdụrụ.
Ojiji dị iche iche, kedu ka esi ahọrọ hydroxypropyl methyl cellulose (HPMC) kwesịrị ekwesị?
– azịza: Kwụsị ịtụ ntụ nwa: ihe achọrọ adịghị mma, viscosity 100000, ọ dị mma, ọ dị mkpa ichebe mmiri ka ọ dịrị nso. Ngwa ngwa: ihe achọrọ dị elu, ihe achọrọ dị elu, ihe achọrọ dị ka 150000 ka ọ ka mma. Ngwa gluu: mkpa maka ngwaahịa ozugbo, viscosity dị elu.
Kedu aha ọzọ a na-akpọ hydroxypropyl methyl cellulose?
– AZỊZA: Hydroxypropyl MethylCellulose, E dere ya n'ime HPMC ma ọ bụ MHPC, ma ọ bụ Hydroxypropyl Methyl Cellulose; Cellulose hydroxypropyl methyl ether; Hypromellose, Cellulose, 2-hydroxypropyl methyl Cellulose ether.
HPMC n'itinye Skim coat n'ọrụ, gịnị kpatara afụfụ Skim coat ji dị mkpa?
Azịza: HPMC na mkpuchi akpụkpọ ahụ, oke ọkpụrụkpụ, mmiri na nhazi nke ọrụ atọ. Anaghị esonye na mmeghachi omume ọ bụla. Ihe na-akpata afụfụ: 1, oke mmiri. 2, ala adịghị akpọnwụ akpọnwụ, n'elu oyi akwa ịkpụcha, ọ dịkwa mfe ịfụ.
Mgbidi dị n'ime na mpụta. Usoro mkpuchi akpụkpọ ahụ?
– azịza: mgbidi dị n'ime ya. Mkpuchi akpụkpọ ahụ: calcium 800KG isi awọ calcium 150KG (starch ether, akwụkwọ ndụ akwụkwọ ndụ dị ọcha, peng runtu, citric acid, polyacrylamide nwere ike itinye nke ọma)
Mgbidi mpụta: simenti 350KG calcium 500KG quartz ájá 150KG ntụ latex 8-12kg cellulose ether 3KG starch ether eriri osisi 0.5kg 2KG
Kedu ihe dị iche n'etiti HPMC na MC?
– Azịza:MC bụ methyl cellulose, nke e ji cellulose ether mee site na usoro mmeghachi omume na methane chloride dị ka ihe na-eme ka ikuku dị ọcha mgbe ejiri alkali gwọọ owu a nụchara anụcha. N'ozuzu, ogo nnọchi bụ 1.6~2.0, ihe na-agbazekwa na-agbanwe dabere na ogo nnọchi. Ọ bụ nke cellulose ether nonionic.
(1) Njide mmiri nke methyl cellulose dabere na ọnụọgụ mgbakwunye ya, viscosity, ịdị mma nke ihe dị n'ime ya na ọnụego mgbaze. Na-agbakwụnye nnukwu ego, obere ịdị mma, viscosity, ọnụego njigide mmiri dị elu. N'ime ha, ọnụọgụ mgbakwunye nwere mmetụta kachasị ukwuu na njigide mmiri, viscosity adịghịkwa nhata na njigide mmiri. Ọnụego mgbaze dabere na ogo mgbanwe elu na ịdị mma nke ihe dị n'ime ya. N'ọtụtụ cellulose ethers dị n'elu, ọnụego njigide mmiri methyl cellulose na hydroxypropyl methyl cellulose dị elu.
(2) Methyl cellulose na-agbaze n'ime mmiri oyi, nke siri ike ịgbaze na mmiri ọkụ. Mmiri ya na-agbaze nke ọma n'ime pH = 3 ~ 12. Ọ na-adaba nke ọma na starch, guanidine gum na ọtụtụ surfactants. Gelation na-eme mgbe okpomọkụ ruru okpomọkụ gelation.
(3) Mgbanwe nke okpomọkụ ga-emetụta oke nchekwa mmiri nke methyl cellulose. N'ozuzu, ka okpomọkụ dị elu, otú ahụ ka nchekwa mmiri na-aka njọ. Ọ bụrụ na okpomọkụ nke mortar karịrị 40℃, nchekwa mmiri nke methyl cellulose ga-aka njọ nke ukwuu, nke na-emetụta ike nrụpụta nke mortar nke ukwuu.
(4) Methyl cellulose nwere mmetụta doro anya na ike ịrụpụta na njikọta nke ngwa agha. "Nrapado" ebe a na-ezo aka na njikọta nke onye ọrụ na-enwe n'etiti ngwaọrụ na ihe mkpuchi mgbidi, ya bụ, iguzogide nkedo nke ngwa agha. Nrapado buru ibu, iguzogide nkedo nke ngwa agha buru ibu, ike ndị ọrụ chọrọ n'oge ojiji dịkwa ukwuu, owuwu nke ngwa agha adịghịkwa mma. Na ngwaahịa cellulose ether, njikọta nke methyl cellulose dị n'ọkwa dị ala.
A na-eji owu eme ka ọ dị ọcha mgbe a gwọchara ya, jiri propylene oxide na chloromethane dị ka ihe na-eme ka ọ dị ka ihe na-eme ka ọ dị ka ihe na-eme ka ọ dị ka ihe na-eme ka ọ dị ka ihe na-eme ka ọ dị ka ihe na-eme ka ọ dị ka ihe na-eme ka ọ dị ka ihe na-eme ka ọ dị ka ihe na-eme ka ọ dị ka ihe na-eme ka ọ dị ka ionic. Ogo nke nnọchi ya na-abụkarị 1.2~2.0. Àgwà ya dị iche iche dabere na oke nke methoxy na hydroxypropyl dị na ya.
(1) Hydroxypropyl methyl cellulose na-agbaze ngwa ngwa na mmiri oyi, nke siri ike ịgbaze na mmiri ọkụ. Agbanyeghị, okpomọkụ gelation ya na mmiri ọkụ dị elu karịa nke methyl cellulose. E mekwara ka methyl cellulose na-agbazekwa nke ọma.
(2) Ọbara nke hydroxypropyl methyl cellulose na-adabere na ibu ya, na ka ibu ya dị elu, otú ahụ ka viscosity si dị elu. Okpomọkụ na-emetụtakwa viscosity. Ọbara nke viscosity na-ebelata ka okpomọkụ na-abawanye. Mana mmetụta okpomọkụ ya dị elu dị ala karịa nke methyl cellulose. Ngwọta ahụ kwụsiri ike mgbe echekwara ya na okpomọkụ ụlọ.
(3) Hydroxypropyl methyl cellulose kwụsiri ike na acid na ntọala, mmiri mmiri ya dịkwa oke mma n'etiti pH = 2 ~ 12. Caustic soda na mmiri lime anaghị enwe mmetụta dị ukwuu na ihe ndị dị na ya, mana alkali nwere ike ime ka ọsọ ya gbasaa ngwa ngwa ma melite viscosity. Hydroxypropyl methyl cellulose na-adịgide ruo mgbe nnu zuru oke, mana mgbe njupụta nke mmiri nnu dị elu, viscosity nke mmiri hydroxypropyl methyl cellulose na-abawanye.
(4) Njide mmiri nke hydroxypropyl methyl cellulose dabere na oke na viscosity ya, oke nchekwa mmiri nke hydroxypropyl methyl cellulose dịkwa elu karịa nke methyl cellulose n'otu usoro.
(5) Enwere ike ịgwakọta Hydroxypropyl methyl cellulose na ngwakọta polymer na-agbaze mmiri ka ha wee bụrụ otu ihe ngwọta viscosity dị elu. Dịka polyvinyl alcohol, starch ether, gluu akwụkwọ nri na ihe ndị ọzọ.
(6) Nrapara nke hydroxypropyl methyl cellulose na ihe owuwu ngwa agha dị elu karịa nke methyl cellulose.
(7) Hydroxypropyl methyl cellulose nwere nguzogide enzyme ka mma karịa methyl cellulose, ohere mbibi enzyme ngwọta ya dịkwa ala karịa nke methyl cellulose.
Gịnị ka a ga-elebara anya na ya n'ọrụ bara uru gbasara mmekọrịta dị n'etiti viscosity na okpomọkụ nke HPMC?
Azịza: ỌNỤỌGWỤ nke HPMC na-adaba n'ọnọdụ okpomọkụ, ya bụ, ọngụ ahụ na-abawanye ka okpomọkụ na-ebelata. Mgbe anyị na-ekwu maka ọngụ ahụ nke ngwaahịa, anyị na-ekwu maka ọngụ ahụ nke 2% nke ngwaahịa ahụ na mmiri na ogo Celsius 20.
N'ọrụ bara uru, n'ebe nwere nnukwu ọdịiche okpomọkụ n'etiti oge okpomọkụ na oge oyi, a ga-amara na a na-atụ aro ka e jiri obere viscosity mee ihe n'oge oyi, nke na-eme ka ọ dịkwuo mma maka owuwu. Ma ọ bụghị ya, mgbe okpomọkụ dị ala, viscosity nke cellulose ga-abawanye, mgbe a na-akpụcha ya, mmetụta ahụ ga-adị arọ.
Ọkwa dị n'etiti: 75000-100000 a na-ejikarị eme ihe maka putty
Ihe Mere: Ezigbo njigide mmiri
Ọbara dị elu: A na-ejikarị HPMC 150000-200000 eme ihe maka mkpuchi ihe mkpuchi polystyrene na ihe mkpuchi ihe mkpuchi vitrified.
Ihe kpatara ya: oke viscosity, ngwa agha adịghị mfe ịda, ịkwanye mmiri, imeziwanye ihe owuwu ahụ.
Ma n'ozuzu, ka viscosity dị elu, otú ahụ ka njigide mmiri ka mma, ọtụtụ ụlọ ọrụ ngwa agha akọrọ, n'ihi na ha na-atụle ọnụ ahịa ya, na-eji viscosity ọkara HPMC cellulose (75000-100000) dochie viscosity ọkara na obere HPMC cellulose (20000-40000) iji belata ọnụọgụ mgbakwunye.
Oge ozi: Jenụwarị-10-2022