Qhov sib txawv ntawm Hydroxypropyl Starch ether thiab Hydroxypropyl Methylcellulose hauv Kev Tsim Kho

Hydroxypropyl Starch Ether (HPSE) thiabHydroxypropyl Methylcellulose (HPMC)yog ob hom dej-soluble polymers feem ntau siv hauv kev tsim kho kev lag luam. Thaum lawv qhia qee qhov sib xws, muaj qhov sib txawv tseem ceeb hauv lawv cov qauv tshuaj thiab cov yam ntxwv ua haujlwm. Hauv qab no yog qhov sib txawv tseem ceeb ntawm Hydroxypropyl Starch Ether thiab Hydroxypropyl Methylcellulose hauv kev tsim kho:

1. Chemical Structure:

• HPSE (Hydroxypropyl Starch Ether):
  • Muab los ntawm cov hmoov txhuv nplej siab, uas yog cov carbohydrate tau los ntawm ntau qhov chaw cog.
  • Hloov kho los ntawm hydroxypropylation los txhim kho nws cov khoom.
• HPMC (Hydroxypropyl Methylcellulose):
  • Muab los ntawm cellulose, ib tug natural polymer pom nyob rau hauv cell phab ntsa ntawm cov nroj tsuag.
  • Hloov kho los ntawm hydroxypropylation thiab methylation kom ua tiav cov khoom xav tau.

2. Khoom siv:

• HPSE:
  • Tau txais los ntawm cov nroj tsuag cov hmoov txhuv nplej siab, xws li pob kws, qos yaj ywm, los yog tapioca.
• HPMC:
  • Muab los ntawm cov nroj tsuag raws li cellulose, feem ntau ntoo pulp los yog paj rwb.

3. Solubility:

• HPSE:
  • Feem ntau nthuav tawm cov dej zoo solubility, tso cai rau yooj yim dispersion nyob rau hauv dej-raws li formulations.
• HPMC:
  • Cov dej-soluble heev, tsim cov kev daws teeb meem hauv dej.

4. Thermal Gelation:

• HPSE:
  • Qee cov hydroxypropyl starch ethers tuaj yeem pom cov khoom thermal gelation, qhov twg cov viscosity ntawm cov tshuaj nce nrog qhov kub thiab txias.
• HPMC:
  • Feem ntau tsis pom cov thermal gelation, thiab nws cov viscosity tseem nyob ruaj khov nyob rau ntawm qhov kub thiab txias.

5. Film-Forming Properties:

• HPSE:
  • Muaj peev xwm tsim cov yeeb yaj kiab nrog qhov yooj yim thiab adhesion zog.
• HPMC:
  • Exhibits film-forming zog, pab txhim kho adhesion thiab cohesion nyob rau hauv kev tsim formulations.

6. Lub luag haujlwm hauv kev tsim kho:

• HPSE:
  • Siv nyob rau hauv kev tsim kho daim ntawv thov rau nws thickening, dej tuav, thiab nplaum zog. Nws tuaj yeem siv rau hauv cov khoom siv gypsum, mortars, thiab adhesives.
• HPMC:
  • Dav siv nyob rau hauv kev tsim kho rau nws lub luag hauj lwm raws li ib tug thickener, dej retention agent, thiab workability enhancer. Nws feem ntau pom muaj nyob rau hauv cov cement-based mortars, pobzeb adhesives, grouts, thiab lwm yam formulations.

7. Compatibility:

• HPSE:
  • Tau tshaj ntau yam ntawm lwm yam kev tsim kho additives thiab cov ntaub ntawv.
• HPMC:
  • Exhibits zoo compatibility nrog ntau yam ntaub ntawv tsim kho thiab additives.

8. Teem sijhawm:

• HPSE:
  • Tej zaum yuav cuam tshuam rau lub sijhawm teeb tsa ntawm qee qhov kev tsim kho.
• HPMC:
  • tuaj yeem cuam tshuam lub sijhawm teeb tsa ntawm mortar thiab lwm yam khoom siv cementitious.

9. Flexibility:

• HPSE:
  • Cov yeeb yaj kiab tsim los ntawm hydroxypropyl starch ethers zoo li hloov tau.
• HPMC:
  • Pab txhawb kom yooj thiab tawg kuj nyob rau hauv kev tsim formulations.

10. Daim Ntawv Thov Cheeb Tsam:

• HPSE:
  • Muaj nyob rau hauv ntau yam khoom siv, xws li plaster, putty, thiab nplaum formulations.
• HPMC:
  • Feem ntau siv hauv cov cement-based mortars, pobzeb adhesives, grouts, thiab lwm yam khoom siv.

Hauv cov ntsiab lus, thaum ob qho tib si Hydroxypropyl Starch Ether (HPSE) thiab Hydroxypropyl Methylcellulose (HPMC) ua haujlwm zoo sib xws hauv kev tsim kho, lawv cov keeb kwm tshuaj lom neeg, cov yam ntxwv solubility, thiab lwm yam khoom ua rau lawv tsim nyog rau cov qauv sib txawv thiab kev siv hauv kev lag luam hauv tsev. Qhov kev xaiv ntawm lawv nyob ntawm qhov kev xav tau ntawm cov khoom siv thiab cov yam ntxwv ntawm kev ua tau zoo.