Kev Kho Hniav Qib Sodium Alginate

 

 

Kev Kho Hniav -qib alginate yog lub ntuj polysaccharide polymer muab rho tawm los ntawm marine xim av algae. Nws tuaj yeem hnov ​​​​mob nrog calcium ntsev los ua ib qho thermally irreversible gel. Ntawm lawv, feem ntau siv alginate yog sodium alginate thiab potassium alginate. Lawv tau siv dav hauv cov ntaub ntawv kho hniav.

 

Alginic acid impression cov ntaub ntawv yog cov khoom siv tsis zoo hydrogel. Lawv lub hauv paus ntsiab lus tseem ceeb yog siv "kev daws teeb meem- gelation transformation" ntawm sodium alginate thiab calcium ions, uas ua rau nws hloov pauv sai ntawm cov kua dej (solute) mus rau cov khoom muaj zog (gel) nyob rau hauv qhov ncauj kab noj hniav, yog li precisely replicating cov hniav thiab lawv cov ntaub so ntswg.

 

Cov khoom sib xyaw ua ke ntawm cov khoom sib txuas dentin (feem ntau yog ob-cov khoom muab tshuaj txhuam)

Txhawm rau kom tswj tau lub sijhawm gel thiab txhim kho kev ua haujlwm zoo, cov khoom lag luam alginate impression cov ntaub ntawv feem ntau yog muab rau hauv daim ntawv ntawm ob lub raj ntawm muab tshuaj txhuam.

 

 

Alginic acid sodium:Muab lub hauv paus rau gel.

Fillers:Xws li silica thiab diatomite, yog siv los ua kom cov viscosity, kho lub zog thiab txo qhov shrinkage.

Plasticizers:Piv txwv li, glycerol, tuaj yeem txhim kho qhov elasticity thiab yooj ntawm cov gel, tiv thaiv nws los ntawm kev tawg dhau.

Retarders / Regulators:Piv txwv li, phosphate (xws li trisodium phosphate). Nws txoj haujlwm yog kom nyiam ua ke nrog calcium ions, ncua cov txheej txheem tshuaj tiv thaiv, thiab yog li muab sijhawm txaus rau kev ua haujlwm.

 

 

Calcium ntsev:Qhov ntau tshaj plaws yog calcium sulfate (gypsum hmoov), uas tuaj yeem muab cov calcium ions uas xav tau los ua tus ntoo khaub lig- txuas cov qauv.

Fillers:Kuj tseem siv los kho cov viscosity thiab kev ntxhib los mos ntawm paste.

Pab catalysts:Piv txwv li, alkali hlau carbonates, uas tuaj yeem tswj cov tshuaj tiv thaiv tus nqi.

Colorants thiab flavorings:Txhim khu qhov tsos thiab saj ntawm cov khoom.

 

 

Thaum ob qho khoom sib xyaw ua ke hauv lub tais sib tov raws li qhov piv txwv, cov kev cuam tshuam tseem ceeb hauv qab no tshwm sim:

1) Pib theem (lub xeev muaj zog):Tom qab sib tov ua tiav, cov muab tshuaj txhuam muaj qee qhov viscosity tab sis tseem ntws tau. Nyob rau lub sijhawm no, tus retarder (phosphate) yuav nyiam ua ke nrog qee cov calcium ions tso tawm los ntawm cov catalyst paste los ua ib qho chaw soluble, ib ntus tiv thaiv calcium ions los ntawm reacting nrog alginate sodium. Qhov no muab lub sijhawm ua haujlwm rau tus kws kho mob (feem ntau 45 vib nas this mus rau 1.5 feeb) txhawm rau thauj khoom mus rau lub tais thiab muab tso rau hauv lub qhov ncauj.

2) Gelation theem:Thaum cov retarder tas lawm, cov calcium ions dawb yuav ua ke nrog cov glucuronic acid units ntawm alginate sodium molecule chains los ua ib qho peb -dimensional ionic cross-linked "egg box" structure network. Nyob rau lub sijhawm no, cov khoom siv yuav hloov pauv sai sai ntawm lub xeev daws teeb meem mus rau lub xeev elastic gel.

3) Tom qab cov tshuaj tiv thaiv tiav lawm, tus qauv ruaj khov thiab elastic yuav raug tsim, uas tuaj yeem sau cov ntsiab lus meej.

 

Yam khoom	Index
Qhov tshwm sim	Cream xim los yog sib dua
Mesh	200 Mesh
Cov dej noo,%	Tsawg dua los yog sib npaug rau 15.0
Yog ',%	18-27
Viscosity, mPa·s	Raws li qhov xav tau
Lub zog, g/c㎡	Raws li qhov xav tau