Hydroxyethyl Cellulose (HEC) iyo hydroxypropyl cellulose (HPC) waa laba nooc oo cellulose caadi ahaan loo isticmaalo. Waxay leeyihiin farqi weyn oo u dhexeeya qaab-dhismeedka, waxqabadka iyo ku-dhaqanka.
1. Qaab dhismeedka kiimikada
Hydroxyethyl cellulose (HEC): Hydroxyethyl cellulose waxaa lagu sameeyay soo bandhigida koox hydroxyethyl (-CH₂CH₂OH) oo ku jirta molecule cellulose. Kooxda hydroxyethyl waxay siisay HEC milmayn wanaagsan iyo xasillooni.
Hydroxypropyl Cellulose (HPC): Hydroxypropyl cellulose waxa ay samaysaa iyada oo soo bandhigaysa koox hydroxypropyl ah (-CH₂CHOHCH₃) oo ku jirta molecule cellulose. Soo bandhigida kooxaha hydroxypropyl waxay siinaya HPC kala duwanaansho iyo astaamo viscosity.
2. Solubility
HEC: Hydroxyethylcellulose waxay leedahay milmayn wanaagsan oo biyaha ah waxayna samayn kartaa xal kolloid ah oo hufan. milmayntiisu waxay ku xidhan tahay heerka beddelka kooxaha hydroxyethyl (tusaale tirada kooxaha hydroxyethyl unuggii gulukoosta).
HPC: Hydroxypropyl cellulose waxay leedahay milmi gaar ah oo ku jira biyaha iyo dareerayaasha organic, gaar ahaan dareerayaasha organic sida ethanol. Solubility HPC waxaa si weyn u saameeya heerkulka. Marka heerkulku kordho, milmahooda biyaha ayaa yaraan doona.
3. Viscosity iyo rheology
HEC. Marka dhogorta la mariyo, viscositykeedu wuu yaraanayaa, taas oo sahlaysa in la isticmaalo oo la isticmaalo.
HPC: Hydroxypropyl cellulose waxa uu leeyahay mawjad aad u hooseeya oo soo bandhigta pseudoplasticity la mid ah xalka. Xalalka HPC waxa kale oo ay samayn karaan kolloydyo hufan, laakiin mawqifkoodu inta badan wuu ka hooseeyaa HEC.
4. Goobaha codsiga
HEC: Hydroxyethyl cellulose waxaa si weyn loogu isticmaalaa dahaarka, qalabka dhismaha, waxyaalaha la isku qurxiyo, saabuunta iyo beeraha kale. Sida dhumuc weyn, xasiliye iyo wakiilka hakin, waxay si wax ku ool ah u xakameyn kartaa viscosity iyo rheology ee nidaamka. Rinjiga iyo dahaarka, HEC waxay ka hortagtaa dejinta midabka waxayna hagaajisaa heerka daahan
HPC: Hydroxypropyl cellulose waxaa inta badan loo isticmaalaa daawooyinka, cuntada, qurxinta iyo qaybaha kale. Warshadaha dawooyinka, HPC waxa caadi ahaan loo isticmaalaa sidii xidhe iyo wakiilka sii daynta la kantaroolo ee kiniiniyada. Warshadaha cuntada, waxa loo isticmaali karaa dhumuc iyo emulsifier ahaan. Maaddaama ay ku milmi karto dareerayaasha organic, HPC sidoo kale waxaa loo isticmaalaa daahan iyo walxaha xuubka qaarkood.
5. Xasilooni iyo adkeysi
HEC. HEC waxay ahaanaysaa mid deggan marka la eego xaaladaha pH sare iyo kuwa hooseeya labadaba.
HPC: Hydroxypropyl cellulose waxay u nugul tahay isbeddellada heerkulka iyo pH, waxayna u nugul tahay gelation gaar ahaan heerkulka sare. Xasiloonideedu waxay ku fiican tahay xaaladaha acidic, laakiin xasilloonida ayaa hoos loo dhigi doonaa xaaladaha alkaline.
6. Deegaanka iyo bay'ada
HEC: Hydroxyethyl cellulose waa nooc ka mid ah cellulose dabiiciga ah, waxay leedahay biodegradability wanaagsan iyo deegaanka saaxiibtinimo.
HPC: Hydroxypropyl cellulose sidoo kale waa walxo biodegradable ah, laakiin dabeecadeeda hoos u dhaca ayaa laga yaabaa inay kala duwanaato sababtoo ah milanka iyo kala duwanaanta codsiyada.
Hydroxyethyl cellulose iyo hydroxypropyl cellulose waa laba nooc oo cellulose ah oo muhiim ah. In kasta oo ay labadooduba awood u leeyihiin in ay dhumucdaan, dejiyaan oo sameeyaan colloid, kala duwanaanshiyaha qaab-dhismeedka awgeed, waxay ku kala duwan yihiin milanka, viscosity, iyo goobaha codsiga. Farqi weyn ayaa u dhexeeya xasilloonida. Doorashada nooca cellulose-ka la isticmaalo si loo isticmaalo waxay kuxirantahay baahida codsiga gaarka ah iyo shuruudaha waxqabadka.
Waqtiga boostada: Agoosto-08-2024