Starch Ether yog dab tsi?

Starch ether yog ib daim ntawv hloov pauv ntawm cov hmoov txhuv nplej siab, ib qho carbohydrate muab los ntawm cov nroj tsuag. Kev hloov kho muaj cov txheej txheem tshuaj uas hloov cov qauv ntawm cov hmoov txhuv nplej siab, ua rau cov khoom muaj kev txhim kho lossis hloov kho. Starch ethers pom dav siv hauv ntau daim ntawv thov kev lag luam vim lawv cov yam ntxwv tshwj xeeb. Qee hom hmoov txhuv nplej siab muaj xws li hydroxyethyl starch (HES), hydroxypropyl starch (HPS), thiab carboxymethyl starch (CMS). Nov yog qhov tseem ceeb ntawm cov hmoov txhuv nplej siab ethers:

1. Kev hloov kho tshuaj:

• Hydroxyethyl Starch (HES): Hauv HES, pawg hydroxyethyl tau qhia rau cov hmoov txhuv nplej siab. Qhov kev hloov kho no txhim kho nws cov dej solubility thiab ua rau nws tsim nyog rau kev siv tshuaj, raws li lub plasma ntim expander, thiab lwm yam kev siv.
• Hydroxypropyl Starch (HPS): HPS yog tsim los ntawm kev qhia hydroxypropyl pawg rau cov hmoov txhuv nplej siab. Qhov kev hloov kho no txhim kho cov khoom xws li dej solubility thiab kev ua yeeb yaj kiab, ua rau nws muaj txiaj ntsig zoo hauv kev lag luam xws li zaub mov, textiles, thiab kev tsim kho.
• Carboxymethyl Starch (CMS): CMS yog tsim los ntawm kev qhia carboxymethyl pawg rau cov hmoov txhuv nplej siab. Qhov kev hloov kho no nthuav tawm cov khoom xws li txhim kho cov dej tuav, thickening, thiab stability, ua rau nws muaj txiaj ntsig zoo hauv cov ntawv thov xws li cov nplaum, textiles, thiab tshuaj.

2. Dej Solubility:

• Cov hmoov txhuv nplej siab ethers feem ntau nthuav tawm cov dej solubility zoo dua piv rau cov hmoov txhuv nplej siab. Qhov kev ua kom zoo dua solubility no yog qhov muaj txiaj ntsig zoo hauv cov qauv uas yuav tsum tau so sai sai lossis dispersion hauv dej.

3. Viscosity thiab Thickening Properties:

• Cov hmoov txhuv nplej siab ethers ua cov thickeners zoo nyob rau hauv ntau yam formulations. Lawv pab txhawb kom muaj viscosity ntxiv, uas yog qhov tseem ceeb hauv cov ntawv thov xws li cov nplaum, txheej, thiab cov khoom noj khoom haus.

4. Muaj peev xwm ua yeeb yaj kiab:

• Qee cov hmoov txhuv nplej siab, tshwj xeeb tshaj yog cov hmoov txhuv nplej siab hydroxypropyl, muaj cov khoom ua yeeb yaj kiab. Qhov no ua rau lawv tsim nyog rau cov ntawv thov uas tsim cov yeeb yaj kiab nyias, hloov tau yooj yim, xws li hauv cov khoom noj thiab tshuaj lag luam.

5. Stabilizing thiab Binding Properties:

• Starch ethers feem ntau yog siv los ua stabilizers thiab binders nyob rau hauv ntau yam formulations. Lawv pab txhim kho kev ruaj ntseg ntawm emulsions thiab pab txhawb rau kev sib koom ua ke ntawm cov khoom xws li tshuaj ntsiav tshuaj.

6. Adhesive Applications:

• Starch ethers pom siv hauv cov nplaum, ob qho tib si hauv kev lag luam khoom noj (piv txwv li, hauv cov pos hniav arabic hloov) thiab cov ntawv tsis siv khoom noj (xws li, hauv ntawv thiab ntim cov nplaum).

7. Textile Sizing:

• Hauv kev lag luam textile, cov hmoov txhuv nplej siab ethers yog siv rau hauv cov qauv tsim los txhim kho lub zog thiab smoothness ntawm cov xov paj thaum lub sij hawm weaving.

8. Kev siv tshuaj:

• Qee cov hmoov txhuv nplej siab ethers yog ua hauj lwm hauv cov tshuaj formulations. Piv txwv li, hydroxyethyl starch yog siv los ua ib qho plasma ntim expander.

9. Kev tsim kho thiab cov khoom siv hauv tsev:

• Starch ethers, tshwj xeeb tshaj yog hydroxypropyl starch thiab carboxymethyl starch, yog siv nyob rau hauv kev tsim kho kev lag luam, tshwj xeeb tshaj yog nyob rau hauv qhuav mix mortar formulations. Lawv pab txhim kho adhesion, kev ua haujlwm, thiab tuav dej.

10. Kev lag luam zaub mov:

11. Biodegradability:

12. Kev txiav txim siab ib puag ncig:

Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias cov khoom tshwj xeeb thiab kev siv cov hmoov txhuv nplej siab ethers tuaj yeem sib txawv raws li hom kev hloov kho thiab kev npaj siv. Cov neeg tsim khoom muab cov ncauj lus qhia ntxaws ntxaws rau txhua hom hmoov txhuv nplej siab ether los qhia cov neeg tsim khoom hauv kev xaiv cov qauv tsim nyog tshaj plaws rau lawv cov ntawv thov tshwj xeeb.