Hydroxypropylmethylcellulose iyo daawaynta dusha sare ee HPMC

Hydroxypropylmethylcellulose(HPMC) waa polymer-ku-saleysan cellulose kaas oo si weyn loogu isticmaalo warshadaha dawooyinka, cuntada, iyo warshadaha qurxinta. Waa budo cad ama ka baxsan oo ku milmay biyaha oo samaysa xal cad oo muuqda. HPMC waxa loo isticmaalaa sidii dhumuc, emulsifier, iyo xasiliye alaabooyin kala duwan. Waxa kale oo loo isticmaalaa sida wakiilka dahaarka ee kiniiniyada iyo kaabsoosha.

Daaweynta dusha sare ee HPMC waxay ku lug leedahay wax ka beddelka sifooyinka dusha sare ee polymerka si kor loogu qaado shaqeyntiisa. Daawaynta dusha sare waxay wanaajin kartaa adhesion, qoynta, iyo kala firdhisanaanta HPMC. Waxa kale oo ay wanaajin kartaa iswaafajinta HPMC iyo maaddooyinka kale ee qaabaynta.

Qaar ka mid ah hababka daaweynta dusha caadiga ah ee HPMC waxaa ka mid ah:

1. Etherification: Tani waxay ku lug leedahay ka falcelinta HPMC oo leh walax alkylating si ay u soo bandhigto kooxo hydrophobic dheeraad ah oo ku yaal dusha sare ee polymerka.

2. Isku-xidhka-isku-xidhka: Tani waxay ku lug leedahay soo bandhigida isku-xirnaanta u dhexeeya molecules HPMC si loo kordhiyo xoogga iyo xasilloonida polymerka.

3. Acetylation: Tani waxay ku lug leedahay soo bandhigida kooxaha acetyl ee dusha sare ee HPMC si loo kordhiyo milanka iyo xasilloonida.

4. Sulfonation: Tani waxay ku lug leedahay soo bandhigida kooxaha sulfonic acid dusha sare ee HPMC si loo hagaajiyo milanka biyaha iyo kala firdhisanaanta.

Guud ahaan, daaweynta dusha sare ee HPMC waxay wanaajin kartaa shaqeynteeda waxayna ka dhigi kartaa mid ku habboon codsiyo kala duwan.