Waa maxay waxa ku jira hydroxypropyl methylcelrelose ka samaysan?

Hydroxypropyl methylcelrelose (HPMC) waa polymer polymale oo si weyn loo isticmaalo ee warshadaha kala duwan, oo loo yaqaan guryahooda iyo codsiyadeeda. Xaruntani waa mid soo saarta cellulose, polymmer dabiici ah oo laga helo darbiyada geedka. Si loo fahmo halabuurka hydroxypropythylcellexylcellelrellase, waxaa lagama maarmaan ah in dib loo dhigo qaab dhismeedka iyo isku-darka isku-darka unugyada unugyada unugyada.

Qaab dhismeedka cellulose:

Cellulose waa karbohaydrayt adag oo ka kooban silsilad toosan oo ah unugyada β-g-glutose ee ku xiran by β-1,4-glycosidididic. Silsiladaha gulukoostan waxaa lagu wadaa in lagu daro bond bonds si loo sameeyo qaab dhismeedka toosan ee adag. Cellulose waa qaybta qaabdhismeedka ugu weyn ee darbiyada dhirta dhirta, iyadoo la siinayo xoog iyo adkeyn si ay u dhisaan unugyada.

Soosaarida hydroxypropyl methylcelrelose:

Hydroxypropylylulolose methylcelrellase waxaa isku daraya kiimikaad wax ka beddelaya chelka by chelloles-ka waxaana lagu soo bandhigayaa hydroxypropyl iyo kooxaha methyl ee silsiladda ugu weyn ee cellulose. Soosaarka badanaa waxaa ku jira tillaabooyinka soo socda:

Falcelinta Ethelity:

Methylation: Daaweynta cellulose xalka alkaline iyo methyl chloride si aad ugu soo bandhigto kooxaha methyl (-ch3) gudaha kooxaha hydroxyl (-h) ee cellulose.

Hydroxypopylation: cellulose cellulose waxay kaloo ka falcelisaa propylene oxide si uu ugu soo bandhigo kooxo hydroxpypropyl (-ch2Chiohchch3) qaab dhismeedka unugyada. Hawshani waxay sare u qaadeysaa jilicsanaanta biyaha waxayna badalaysaa astaamaha jir ahaaneed ee cellulose.

Daahirinta:

Unugyada unugyada wax laga beddelay ayaa markaa loo daahiriyaa si looga saaro wixii ka mid ah dib-u-habeyn aan la-koobi karin, alaabooyin ama cilado.

Qalajinta iyo shiididda:

Hay'adda hydroxypropylykyl methylcelrellase waa la qalajiyaa oo ku dhexjirtaa budo ganaax ah oo diyaar u ah in lagu isticmaalo codsiyo kala duwan.

Waxyaabaha ay ka kooban tahay hydroxypropyl methylcelrelose:

Halabuurka hydroxypropylylulosure waxaa lagu gartaa heerka beddelka, kaas oo loola jeedo shahaadada ku jirta biyo-ku-taaloyinka metroxypropyl iyo kooxaha methylypyph-ka ay ku beddelaan kooxaha hydroxyl ee silsiladda unugyada. Darajooyinka kala duwan ee HPMC waxay leeyihiin heerar kala duwan oo ah beddelaad, oo saameeya xaamilayaashooda, viscositykooda iyo guryaha kale.

 

Qaaciddada kiimikada ee hydroxypropylylrcellellalose waxaa loo sheegi karaa sidii (c6h7o2 (OCH3) MN (OCH3) M (OCH3) M (OCH3) M (OCH3) N) _x, halkaasoo m iyo n ay matalaan heerka beddelka.

M: shahaadada methylation (kooxaha methyl per gulukoose)

n: shahaadada hydroxypropylopylation (hydroxypropyl youter's qaybta gulukooska)

x: Tirada unugyada gulukooska ee silsilada unugyada

Tilmaamaha iyo Codsiyada:

SOLUBENES: HPMC waa biyo-milmi, iyo heerka beddelka ayaa saameeya astaamaha isku-darka. Waxay ku sameysaa xalka cad oo viscous ah oo biyo ah, taasoo ka dhigeysa mid ku habboon qaabab kala duwan.

Viscosisisis: Marxaladda hoose ee xalka HPMC waxay kuxirantahay qodobbada sida miisaanka molikalar iyo heerka beddelka. Hantidan ayaa muhiim u ah codsiyada sida dawooyinka u baahan ka mid ah sii deynta la xakameynaya.

Qaanuunka Filimka

Xiidistayaasha iyo dhumucyada: ee warshadaha cuntada, HPMC waxaa loo isticmaalaa sidii dhumuc oo ka mid ah badeecado kala duwan, oo ay ku jiraan suugooyinka, oo ay ku jiraan suule, macmacaanka, iyo alaabada la dubay.

Codsiyada Daawooyinka: HPMC waxaa si weyn loogu isticmaalaa qaababka dawooyinka, oo ay ku jiraan kiniinno, kaabsoosha, iyo xalalka indhaha, sababtuna tahay siidaynta la xakameeyo iyo biocompattate-ka.

Dhismaha iyo jaakadaha: HPMC waxaa loo isticmaalaa agabyada dhismaha sida madaafiic, tile adheals iyo balaastiro. Waxaa sidoo kale loo isticmaalaa sidii dhumuc weyn oo lagu nasiyo rinjiga iyo foomamka daboolka.

Alaabada daryeelka shakhsi ahaaneed: ee ku jira warshadaha is-qurxinta ah iyo warshadaha daryeelka shakhsi ahaaneed, HPMC waxaa laga helaa badeecadaha sida kareemada, lotus iyo shaambo, halkaas oo ay ku siiso dareen-celin iyo xasillooni.

Hydroxypropyl methylcelrellase waxaa lagu helaa methylation iyo hydroxypropylation ee cellulose. Waa polymer ujeedo badan leh oo leh noocyo fara badan oo kala duwan. Guryaheeda u gaarka ah waxay ka dhigeysaa mid qiimo u leh warshadaha sida dawooyinka, cuntada, dhismaha iyo daryeelka shaqsiyeed. Wax ka badalida xakameysan ee cellulose waxay ganaaxi kartaa sifooyinka HPMC, taasoo ka dhigaysa qayb muhiim ah oo ka mid ah alaabada badan ee aan ku kulanno nolol-maalmeedka.


Waqtiga Post: Jan-10-2024