Methylhydroxyethylcellulose (MHEC) na-arụ ọrụ dị mkpa n'ịkwalite nkwụsi ike nke putty, ihe a na-ejikarị eme ihe na ụlọ ọrụ dị iche iche gụnyere ihe owuwu, ụgbọ ala na mmepụta ihe. Edemede a na-enye nyocha miri emi nke ihe onwunwe nke MHEC na mmetụta dị ịrịba ama na mmelite nke nkwụsi ike nke putty. Ọ na-enyocha ihe mejupụtara kemịkalụ, akụrụngwa anụ ahụ, na usoro omume nke MHEC na usoro putty.
Putty bụ ihe eji eme ihe n'ọtụtụ ebe n'ịrụ ụlọ, nrụzi ụgbọ ala, nrụpụta na ọtụtụ ụlọ ọrụ ndị ọzọ. Nkwenye ya bụ isi ihe na-achọpụta ike ya na ịdị irè ya na ngwa dị iche iche. Iji nweta nguzosi ike nke putty chọrọ nlebara anya nsogbu dị iche iche dị ka njikwa viscosity, ịrụ ọrụ na ihe nrapado. Methylhydroxyethylcellulose (MHEC) na-apụta dị ka ihe mgbakwunye isi nke na-abawanye nkwụsi ike nke putty ka ọ na-eme ka njirimara arụmọrụ ya dịkwuo elu.
1. Ngwakọta kemịkalụ na ihe anụ ahụ nke MHEC
MHEC bụ nonionic cellulose ether nwetara site na mgbanwe kemịkalụ nke cellulose. A na-emepụta ya site na iji ethylene oxide na methyl chloride meghachi omume cellulose iji webata hydroxyethyl na methyl otu n'ime agbụ cellulose. Ogo nke nnọchi (DS) nke hydroxyethyl na methyl otu na-emetụta nke ọma njirimara nke MHEC, gụnyere solubility, viscosity, na rheological omume.
Ọdịdị molekụla nke MHEC na-enye ya ihe pụrụ iche, na-eme ka ọ dị mma maka ngwa dị iche iche, gụnyere ihe nhazi nke putty. MHEC nwere ezigbo mmiri solubility na-emepụta ihe ngwọta na-egbuke egbuke ma kwụsie ike mgbe a gbasasịrị na mmiri. Njirimara solubility a na-akwado ọbụna nkesa n'ime matrix putty, na-ahụ na arụmọrụ na-agbanwe agbanwe site na batch ruo na batch.
MHEC na-enye pseudoplastic rheological omume na-emepụta putty, nke pụtara na viscosity ya na-ebelata na ọnụ ọgụgụ shear na-abawanye. Nke a rheological onwunwe enhances na putty si workability, mfe nke ngwa na ịkpụzi, mgbe ịnọgide na-enwe zuru oke sag iguzogide na thixotropic omume.
MHEC nwere ọmarịcha ihe na-emepụta ihe nkiri, na-enyere aka melite ike na-ejikọta ya na ntinye nke putty n'elu ala. Ikike imepụta ihe nkiri ya na-emepụta ihe mgbochi nchebe, na-eme ka ike dị ogologo na nguzogide ihu igwe, na-eme ka putty dị mma maka ngwa n'èzí.
2. Usoro nke omume nke MHEC na putty formulations
Ọrụ MHEC n'ịkwalite nkwụsi ike nke putty nwere ọtụtụ akụkụ ma na-agụnye ọtụtụ usoro nke ime ihe na-emetụta njirimara reological na arụmọrụ ya.
Otu usoro bụ isi bụ hydration na ọzịza nke ụmụ irighiri ihe MHEC n'ụdị putty dabere na mmiri. Mgbe a gbasasịrị n'ime mmiri, agbụ MHEC na-eme ka ọ dị ọcha, na-eme ka e guzobe netwọk polymer hydrated n'ime matrix putty. Usoro netwọk a na-enye putty viscosity na pseudoplastic omume, na-enye ohere ka ọ na-asọba ngwa ngwa n'okpuru nrụgide siri ike ka ọ na-ejigide ọdịdị ya na ịdị n'otu.
MHEC na-arụ ọrụ dị ka onye na-agba mmiri site n'ịbawanye viscosity nke oge mmiri na usoro putty. Ọdịdị hydrophilic nke MHEC na-akwalite njide mmiri, na-egbochi oke evaporation na ihicha nke putty n'oge ngwa. Ikike njide mmiri a na-agbatị oge oghere nke putty, na-enye ohere zuru ezu iji rụọ ọrụ tupu ịtọlite , na-abawanye mgbanwe ngwa ngwa na ibelata ihe mkpofu ihe.
MHEC na-arụ ọrụ dị ka ihe nkedo na stabilizer n'ime usoro putty. Site n'ịme njikọ hydrogen na ihe ndị ọzọ dị ka fillers, pigmenti na polymers. Mmekọrịta ndị a na-akwalite ịdị n'otu na ịgbasa otu nke ihe mgbakwunye n'ime matrix putty, si otú ahụ na-eme ka ihe ndị a na-arụ ọrụ na-arụ ọrụ, nkwụsi ike agba na arụmọrụ zuru ezu.
MHEC na-enye aka na omume thixotropic nke putty, nke pụtara na ọ na-egosipụta viscosity dị elu na ezumike na obere viscosity n'okpuru nrụgide siri ike. Ngwongwo a na-eme ka ngwa ngwa dị mfe na ịgbasa putty ka ọ na-egbochi ịdaba ma ọ bụ daa n'elu elu kwụ ọtọ. The thixotropic ọdịdị nke putty formulations nwere MHEC ana achi achi kacha mma mkpuchi na edo edo nke etinyere n'ígwé, si otú eme aesthetics na elu imecha.
3. Ihe ndị na-emetụta nkwụsị nke putty na ọrụ MHEC
Enwere ọtụtụ ihe na-emetụta nguzozi nke usoro putty, gụnyere ụdị na ịdị mma nke akụrụngwa, usoro usoro, ọnọdụ nhazi na ihe gburugburu ebe obibi. MHEC na-arụ ọrụ dị mkpa n'ịgbasa ihe ndị a na ịkwalite nkwụsi ike nke putty iji mezuo ihe achọrọ arụ ọrụ.
Otu ihe dị mkpa bụ nha nha na nkesa nke ndị na-ejuputa na pigmenti na nhazi nke putty. Ihe dị mma na-emekarị ka viscosity na thixotropy dịkwuo elu, ebe ihe ndị na-adịghị mma nwere ike ibelata eruba na ịdị n'otu. MHEC na-enyere aka ibelata okwu ndị a site n'ịkwalite ụdị mgbasa ozi na nkwusioru nke ụmụ irighiri ihe dị n'ime matriks putty, na-ahụ na viscosity na-agbanwe agbanwe na omume rheological.
Ọnụ ọgụgụ na ndakọrịta nke ihe dị iche iche na usoro putty na-emetụtakwa nkwekọ na arụmọrụ nke putty. MHEC na-arụ ọrụ dị ka onye na-emekọrịta ihe na rheology modifier, na-akwalite njikọ nke ihe mgbakwunye dị iche iche dị ka resins, plasticizers na rheology modifiers. Ngwongwo ya dị iche iche na-enye ndị na-emepụta ihe ohere ime mgbanwe na mma-mezie ihe gbasara rheological nke putty na ngwa chọrọ.
Usoro nhazi dị ka ịgwakọta ọsọ, okpomọkụ, na ọnụ ọgụgụ shear nwere ike imetụta mgbasa na mmekọrịta nke MHEC na ntinye ntinye. Ịmepụta paramita ndị a na-eme ka mmiri dị mma na ịgbalite ụmụ irighiri ihe MHEC, na-eme ka ha sie ike, na-eme ka ahụ sie ike, na mmetụta njikọ.
Tụkwasị na nke ahụ, ọnọdụ gburugburu ebe obibi dị ka iru mmiri, okpomọkụ na ihe ndị dị n'elu nwere ike imetụta ngwa na omume ọgwụgwọ nke putty. MHEC na-eme ka njigide mmiri na njigide ihe nke putty dị mma, na-eme ka ọ dị mma maka ọnọdụ gburugburu ebe obibi na ihe ndị na-emepụta ihe.
4. Ngwa usoro na usoro onunu ogwu
Iji MHEC rụọ ọrụ nke ọma na usoro putty chọrọ nleba anya nke ọma nke usoro ngwa na ọkwa usoro onunu iji nweta nkwekọ achọrọ na njirimara arụmọrụ. Ngwakọta nke ọma, ntinye na usoro ọgwụgwọ dị oke mkpa iji hụ na nkesa otu na ịgbalite MHEC n'ime matrix putty.
N'oge mmepe nhazi, ọ dị oke mkpa iji chọpụta ego kachasị mma nke MHEC dabere na ihe achọrọ arụ ọrụ dị ka viscosity, nkwụsị sag, na oge ihicha. Ọnụ ego MHEC ejiri mee ihe nwere ike ịdịgasị iche dabere na ihe ndị dị ka ụdị putty, usoro ngwa, ọnọdụ mkpụrụ na ihe gburugburu ebe obibi.
Dabere na ọdịdị nke mkpụrụ ahụ, njedebe elu a chọrọ na ihe achọrọ, a pụrụ iji usoro ihe owuwu dị iche iche mee ihe, gụnyere ịhịa aka n'aka, ịgbasa na extrusion. Usoro Putty nwere MHEC na-egosipụta ezigbo ndakọrịta na ụzọ ngwa dị iche iche, na-enye ohere maka mgbanwe na mgbanwe n'iji.
Oge nzipu: Feb-28-2024