Methylcellulose (MC) waa maaddo kiimiko ah oo caadi ah oo polymer ah, eter cellulose ah oo la beddelay oo ay heshay methylating cellulose dabiiciga ah. Sababo la xiriira sifooyinka gaarka ah ee jirka iyo kiimikada, waxaa si weyn loogu isticmaalaa dhismaha, cuntada, daawada, qurxinta, waraaqaha iyo dahaarka.
1. Kala soocida heerka beddelka
Heerka beddelka (DS) waxaa loola jeedaa celceliska qiimaha kooxaha hydroxyl ee ay ku beddeleen kooxaha methyl unug kasta oo gulukoos ee methylcellulose. Waxaa jira 3 kooxood oo hydroxyl giraan kasta oo gulukoos ah oo ah unugyadu cellulose kuwaas oo lagu bedeli karo kooxaha methyl. Sidaa darteed, heerka beddelka methylcellulose wuxuu ku kala duwanaan karaa 0 ilaa 3. Marka loo eego heerka beddelka, methylcellulose waxaa loo qaybin karaa laba qaybood: heerka sare ee beddelka iyo heerka hoose ee beddelka.
Heerarka sare ee beddelka methylcellulose (DS> 1.5): Alaabta noocan ahi waxay leedahay heer sare oo beddelka methyl, sidaas darteed waa hydrophobic badan, waxay leedahay milanka hoose iyo iska caabbinta biyaha wanaagsan. Inta badan waxaa loo isticmaalaa qalabka dhismaha, dahaarka iyo munaasabadaha kale ee u baahan heer gaar ah oo hydrophobicity ah.
Darajada hoose ee beddelka methylcellulose (DS <1.5): Sababtoo ah beddelka methyl yar awgeed, nooca badeecada ayaa ka badan hydrophilic, waxay leedahay milmayn wanaagsan waxaana lagu milmi karaa biyo qabow. methylcellulose-hooseeya ayaa si weyn loogu isticmaalaa cuntada iyo warshadaha dawooyinka sida dhumuc weyn, emulsifier iyo xasiliye.
2. Kala soocida isticmaalka
Marka loo eego isticmaalka methylcellulose ee dhinacyo kala duwan, waxaa loo qaybin karaa laba qaybood: methylcellulose warshadaha iyo cuntada iyo methylcellulose daawada.
methylcellulose warshadaha: Inta badan loo isticmaalo in dhismaha, daahan, waraaqaha, dhoobada iyo warshadaha kale sida dhumucdiisuna, xabagta, film hore, wakiilka biyaha haynta, iwm In warshadaha dhismaha, methylcellulose waxaa loo isticmaalaa in sibidhka iyo alaabta gypsum si loo hagaajiyo waxqabadka dhismaha iyo adkeysiga; Warshadaha dahaarka, methylcellulose waxay kordhin kartaa xasilloonida iyo kala firdhinta dahaarka.
Cuntada iyo daawada methylcellulose: Sababo la xiriira sifooyinka aan sunta ahayn iyo kuwa aan waxyeellada lahayn, methylcellulose waxaa loo isticmaalaa wax lagu daro cuntada iyo daawada. Cuntada, methylcellulose waa dhumuc caadi ah iyo emulsifier kaas oo xasilin kara qaabka cuntada kana hortagaya kala-soocidda ama kala-goynta; Goobta dawooyinka, methylcellulose waxaa loo isticmaali karaa sidii qolof kaabsal ah, side daroogada, iyo sidoo kale waxay leedahay shaqada daawooyinka sii-daynta joogtada ah. Cuntodeeda iyo badbaadadeeda ayaa methylcellulose ka dhigaya mid caan ka ah labadan goobood.
3. Kala soocida milmayn
Methylcellulose inta badan waxay u qaybsantaa laba qaybood marka loo eego milanka: nooca dareeraha biyaha qabow iyo nooca dareeraha organic.
methylcellulose biyo qabow: Noocan ah methylcellulose waxaa lagu milmi karaa biyo qabow si loo sameeyo xal hufan oo muuqda kadib kala diri. Inta badan waxaa loo isticmaalaa warshadaha cuntada iyo dawooyinka sidii dhumuc ama filim hore. Solubility ee nooca methylcellulose ee noocan oo kale ah ayaa hoos u dhacaya heerkulka sii kordhaya, sidaas darteed qaabkan waxaa loo isticmaali karaa xakamaynta dhismaha marka loo isticmaalo warshadaha dhismaha.
methylcellulose dareere dareere ah: Noocan methylcellulose waxaa lagu milmi karaa dareerayaasha organic waxaana badanaa loo isticmaalaa rinjiyada, dahaarka iyo goobaha kale ee warshadaha ee u baahan warbaahinta wajiga dabiiciga ah. Sababtoo ah sifooyinka filim-samaynta wanaagsan iyo caabbinta kiimikada, waxay ku habboon tahay isticmaalka xaaladaha adag ee warshadaha.
4. Kala soocida miisaanka unugyada (viscosity)
Miisaanka molecular ee methylcellulose wuxuu saameyn weyn ku leeyahay sifooyinka jireed, gaar ahaan waxqabadka viscosity ee xalka. Marka loo eego miisaanka kelli, methylcellulose waxaa loo qaybin karaa nooca viscosity hooseeya iyo nooca viscosity sare.
Miisaanka yar ee methylcellulose: Miisaanka kelliyadu waa yar yahay, mawjadaha xalkuna waa hooseeyaa. Inta badan waxaa loo isticmaalaa cuntada, daawada iyo waxyaalaha la isku qurxiyo, badi ahaan emulsification, hakinta iyo dhumucyada. methylcellulose-ka-yar ee viscosity-ku wuxuu ilaalin karaa dareeraha wanaagsan iyo isku-duubnaanta, wuxuuna ku habboon yahay codsiyada u baahan xalal yar-yar.
methylcellulose-viscosity High-viscosity: Waxay leedahay miisaan kelli ah oo weyn waxayna samaysaa xal sare oo viscosity ah kadib kala diri. Inta badan waxaa loo isticmaalaa qalabka dhismaha, dahaarka iyo xabagta warshadaha. methylcellulose-viscosity-sare ayaa si wax ku ool ah u kordhin kara xoogga farsamada, xirto caabbinta iyo xajinta xalka, sidaas darteed waxaa si ballaaran loo isticmaalaa qalabka u baahan xoog sare iyo iska caabin sare.
5. Kala soocida heerka isbeddelka kiimikada
Methylcellulose waa nooc ka mid ah unugyada cellulose oo kiimiko la beddelay. Marka loo eego habka wax ka beddelka iyo shahaadada, waxa loo qaybin karaa hal unug oo methyl cellulose ah iyo cellulose la beddelay oo isku dhafan.
Hal methyl cellulose: waxaa loola jeedaa ethers cellulose kuwaas oo kaliya methyl-la beddelay. Alaabta noocan ahi waxay leedahay sifooyin jidheed iyo kiimiko oo xasiloon, milmaynteeda, dhumucdeeda iyo samaynta aflaanta ayaa aad u wanaagsan.
Cellulose isku dhafan oo wax laga beddelay: Marka lagu daro methylation, waxaa lagu sii daaweeyaa kiimiko ahaan, sida hydroxypropylation, ethylation, iwm., si loo sameeyo badeeco isku dhafan oo wax laga beddelay. Tusaale ahaan, hydroxypropyl methylcellulose (HPMC) iyo carboxymethyl cellulose (CMC). Unugyadan cellulose-ka ah ee isku-dhafan ee wax laga beddelay waxay badanaa leeyihiin milmi-biyood ka wanaagsan, caabbinta kulaylka iyo xasilloonida, waxayna la qabsan karaan baahiyo ballaadhan oo warshadeed.
6. Kala soocida warshadaha codsiga
Codsiga ballaaran ee methylcellulose wuxuu u oggolaanayaa in loo kala saaro si waafaqsan sifooyinka codsiga ee warshadaha kala duwan.
Warshadaha dhismaha methylcellulose: Inta badan waxaa loo isticmaalaa sibidhka ku salaysan iyo walxaha gypsum-ku-salaysan sidii biyo haynta iyo dhumucdooda. Waxay wanaajin kartaa shaqada qalabka dhismaha, waxay ka hortagtaa luminta biyaha hore, waxayna kordhin kartaa xoogga farsamada ee alaabta la dhammeeyey.
Warshadaha cuntada methylcellulose: Sida emulsifier, dhumuc iyo xasiliye ee habaynta cuntada. Waxay ka hortagi kartaa luminta biyaha, wanaajin kartaa dhadhanka iyo qaabka cuntada, waxayna kordhin kartaa nolosha shelf ee cuntada.
Warshadaha dawooyinka methylcellulose: Sida kiniinka xidhaha ama walxaha sii-daynta joogtada ah ee daroogada. Methylcellulose sidoo kale waxaa loo isticmaali karaa diyaarinta dawooyinka caloosha iyo mindhicirka si badbaado leh oo dawooyin ah oo waxtar leh.
Warshadaha qurxinta methylcellulose: Alaabada daryeelka maqaarka iyo waxyaalaha la isku qurxiyo, methylcellulose waxaa loo isticmaalaa dhumuc weyn, emulsifier iyo moisturizer si ay uga caawiso alaabada inay samaystaan qaab jilicsan oo siman iyadoo sii dheeraynaysa saamaynta qoyaanka.
Marka la soo koobo, waxaa jira siyaabo badan oo lagu kala saaro methylcellulose, taas oo lagu kala saari karo iyada oo loo eegayo sifooyinka qaabdhismeedka kiimikada, ama marka loo eego goobaha codsiga iyo sifooyinka milanka. Hababkan kala-soocidda ee kala duwani waxay naga caawinayaan inaan si wanaagsan u fahanno sifooyinka iyo shaqooyinka methylcellulose, iyo sidoo kale inay bixiyaan aasaas aragtiyeed codsigeeda dhinacyo kala duwan.
Waqtiga boostada: Oct-23-2024