Hydroxypropyl methylcellulose (HPMC) bụ ihe mgbakwunye dị mkpa na nrapado taịlị ọgbara ọhụrụ yana mgbakwunye kemịkalụ na-ewu. Ngwongwo ya multifunctional na-eme ka akụkụ niile nke nhazi ihe nrapado na-eme ka ọ dịkwuo mma, na-enyere aka melite nhazi nhazi, njide mmiri, adhesion na n'ozuzu arụmọrụ.
Ụlọ ọrụ ihe owuwu na-aga n'ihu na-achọ ihe ngwọta ọhụrụ iji melite arụmọrụ na ịdịte aka nke ihe ụlọ. N'ime ihe mgbakwunye dị iche iche a na-eji na-emepụta kemịkalụ ihe owuwu, hydroxypropyl methylcellulose (HPMC) adọtala uche n'ihi ọtụtụ uru ya na nrapado tile na ihe mgbakwunye kemịkal na-ewu. HPMC bụ ihe mmepụta nke cellulose nwere ihe pụrụ iche nke nwere ike imetụta arụmọrụ nke nrapado ma melite ogo ọrụ ụlọ. Ebumnuche nke isiokwu a bụ inyocha ọrụ na uru nke HPMC na nrapado tile na ihe mgbakwunye kemịkalụ, na-akọwapụta ihe mejupụtara kemịkalụ ya, usoro ihe omume na uru ọ na-enye ụlọ ọrụ ihe owuwu.
1. Chemical mejupụtara na Njirimara nke HPMC:
Hydroxypropyl methylcellulose (HPMC) bụ polymer synthetic nke nwere kemịkalụ gbanwetụrụ site na cellulose. A na-ejikọta ya site n'ịgwọ cellulose na propylene oxide na methyl chloride, na-emepụta ihe na-emepụta ihe na hydroxypropyl na methyl substituents (-OH na -CH3 ìgwè) jikọtara na ọkpụkpụ azụ cellulose. Ogo nke nnọchi (DS) nke otu hydroxypropyl na methyl na-ekpebi njirimara nke HPMC, gụnyere viscosity, solubility, na nkwụsi ike ọkụ.
HPMC nwere ọmarịcha mmiri solubility na-etolite a transperent na viscous ngwọta mgbe agbasasị na mmiri. Otú ọ dị, solubility ya na-adabere na okpomọkụ, yana okpomọkụ dị elu na-akwado mgbasa. Ngwongwo a na-eme ka HPMC dabara adaba maka iji kemịkalụ kemịkalụ ewu ebe sistemu mmiri juru ebe niile. Na mgbakwunye, HPMC na-enye pseudoplastic omume na ngwọta, nke pụtara na viscosity ya na-ebelata n'okpuru nrụgide shiee, si otú ahụ na-eme ka ngwa ngwa dị mfe ma na-emeziwanye usoro nhazi nke nrapado.
2. Usoro nke ọrụ nke ceramic tile nrapado:
N'ime usoro nrapado tile, HPMC na-arụ ọrụ dị iche iche n'ihi nhazi kemịkalụ pụrụ iche na akụrụngwa ya. Otu n'ime ọrụ ya bụ isi bụ ime ihe dị ka onye na-agba ume, na-eme ka nkwụsi ike na ịrụ ọrụ nke nrapado. Site n'ịbawanye viscosity, HPMC na-enyere aka gbochie ngwa ngwa nrapado ka ọ ghara ịda ma ọ bụ daa, na-ahụ na mkpuchi kwesịrị ekwesị na njikọ dị n'etiti taịlị na mkpụrụ.
HPMC na-arụkwa ọrụ dị ka onye na-ejigide mmiri, na-ekwe ka nrapado na-enwekwa ọdịnaya mmiri zuru oke n'oge usoro ọgwụgwọ. Ihe onwunwe a dị mkpa iji hụ na hydration kwesịrị ekwesị nke ihe simenti dị na nrapado, na-akwalite njikọ siri ike ma na-ebelata ihe ize ndụ nke nkwụsịtụ. Na mgbakwunye, ikike njide mmiri nke HPMC na-enyere aka ịgbatị oge oghe, na-enye ohere zuru oke maka idowe taịlị na ngbanwe tupu ịtọọ nrapado.
HPMC na-etolite ihe nkiri na-agbanwe agbanwe na nke nnyapade mgbe a na-ehicha ya, si otú ahụ na-emeziwanye njirimara njikọ nke nrapado taịlị. Ihe nkiri a na-arụ ọrụ dị ka ihe nrapado, na-akwalite njikọ n'etiti akwa mkpuchi, taịl nile na mkpụrụ. Ọnụnọ nke HPMC na-eme ka ike nkekọ na ịdịte aka nke nrụnye tile na-ebelata, na-ebelata ikike nke debonding ma ọ bụ delamination ka oge na-aga.
3. Mmetụta na-ewu chemical admixtures:
Na mgbakwunye na nrapado taịlị, a na-eji HPMC eme ihe n'ọtụtụ kemịkalụ dị iche iche na-ewu ụlọ, gụnyere ngwa agha, plasta na grouts. Njirimara multifunctional ya na-eme ka ọ bụrụ ihe mgbakwunye dị mkpa iji welie arụmọrụ na ịdịte aka nke ihe ndị a. N'ime ngwa agha, HPMC na-arụ ọrụ dị ka rheology modifier, na-achịkwa omume ịgba ọsọ na nkwekọ nke ngwakọta. Nke a na-eme ka ngwa otu na-arụ ọrụ dịkwuo mma, na-eme ka ntinye ma na-ebelata ihe mkpofu.
HPMC na-enyere aka melite njirimara nhazi onwe nke ogige ụlọ na mkpụrụ SCR, na-enye ohere maka ịdị nro, ọbụnadị elu. Ikike ijide mmiri ya na-egbochi ngwakọta ahụ ịsachapụ ngwa ngwa, na-akwalite ọgwụgwọ kwesịrị ekwesị ma na-ebelata ezughị okè dị elu dị ka mgbawa ma ọ bụ mgbawa. Na mgbakwunye, HPMC na-eme ka adhesion na adhesion nke plasta na grouts dịkwuo elu, na-eme ka ọ dịkwuo ike ma mara mma.
Iji HPMC na-ewu kemịkalụ admixtures dabara na ebumnuche nkwado ụlọ ọrụ. Site na imeziwanye nhazi na ibelata oriri ihe, HPMC na-enye aka na nrụpụta akụrụngwa na mbelata mkpofu. Na mgbakwunye, ọrụ ya n'ịkwalite ịdịte aka nke ihe eji arụ ụlọ na-enyere aka ịgbatị ndụ ụlọ, si otú ahụ belata mkpa ọ dị ịrụzi ma ọ bụ dochie anya ya ugboro ugboro.
Hydroxypropyl methylcellulose (HPMC) na-arụ ọrụ dị mkpa na nrapado tile ọgbara ọhụrụ na ihe mgbakwunye kemịkalụ na-ewu, na-enye ọtụtụ uru na-enyere aka melite arụmọrụ, ịrụ ọrụ na ịdịte aka. Ngwakọta kemịkalụ ya pụrụ iche na ihe onwunwe ya na-enyere ya aka ịrụ ọrụ dị ka ihe na-ekpu mmiri, ihe na-ejigide mmiri na onye na-akwalite adhesion n'ụdị nrapado. Na mgbakwunye, HPMC enhances rheological Njirimara nke ewu chemical admixtures ikwado ngwa na hụ uniformity nke okokụre ngwaahịa.
Ojiji HPMC juru ebe niile na ụlọ ọrụ ihe owuwu na-egosipụta mkpa ọ dị dị ka mgbakwunye na-agbanwe agbanwe nke na-eme ka ịdịmma na nkwado nke ihe ụlọ dị mma. Ka omume ihe owuwu na-aga n'ihu na-etolite, mkpa maka ngwọta ọhụrụ iji melite arụmọrụ na ịdịte aka ga-eme ka nyocha na mmepe nke usoro dabeere na HPMC. Site na ijikwa ikike nke HPMC, ụlọ ọrụ na-ewu ụlọ nwere ike ịghọta ọganihu n'ime ihe onwunwe ma tinye aka na mmepe nke gburugburu ebe obibi na-adịgide adịgide ma na-adịgide adịgide.
Oge nzipu: Feb-26-2024