Kiimikada darajada maalinlaha ah ee hydroxypropyl methylcellulose waa polymer synthetic oo laga sameeyay cellulose dabiiciga ah iyada oo loo marayo wax ka beddel kiimikaad. Cellulose ether waa nooc ka mid ah cellulose dabiiciga ah. Wax soo saarka ether-ka cellulose wuu ka duwan yahay polymers-ka synthetic. Maaddada ugu badan ee aasaasiga ah waa cellulose, oo ah ka samaysan polymer dabiici ah.
Sababtoo ah gaar ahaan qaab dhismeedka cellulose dabiiciga ah, cellulose lafteedu awood uma laha inay ka falceliyaan wakiilada etherification. Si kastaba ha ahaatee, ka dib daaweynta wakiilka bararka, bonds hydrogen xooggan u dhexeeya silsiladaha molecular iyo silsiladaha waa la burburiyaa, iyo sii daynta firfircoon ee kooxda hydroxyl waxay noqotaa cellulose alkali fal-celin ah. Ka dib falcelinta wakiilka etherifying, kooxda -OH waxa loo beddelaa AMA koox Hel ether cellulose. 200,000-viscosity hydroxypropyl methylcellulose ee "Max" maalin kasta oo kiimiko ah waa budo cad ama wax yar oo huruud ah, oo aan ur lahayn, aan dhadhamin oo aan sun ahayn. Waxaa lagu milmi karaa biyo qabow iyo dareere isku dhafan oo walxaha organic ah si loo sameeyo xal hufan.
Dareeraha isticmaalka biyaha ayaa leh dhaqdhaqaaqa dusha sare, daah-furnaan sare, xasillooni xoog leh, oo aan saameyn ku yeelan pH marka lagu milmo biyaha. Waxay ku leedahay saamaynta dhumucda iyo barafka ka-hortagga ee shaambooyinka iyo shaambada qubeyska, waxayna leedahay haynta biyaha iyo samaynta aflaanta wanaagsan ee timaha iyo maqaarka. Iyada oo kor u kaca fiiqan ee alaabta ceeriin ee aasaasiga ah, isticmaalka cellulose (daaweeyaha ka-hortagga ka-hortagga) ee shaambada iyo qubeyska ayaa si weyn u yareyn kara kharashka waxayna gaari kartaa saameynta la rabo.
Waqtiga boostada: Abriil-21-2023