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Ntuziaka zuru oke maka HEC

ANtuziaka zuru oke maka HEC (Hydroxyethyl Cellulose)

1. Okwu Mmalite nke Hydroxyethyl Cellulose (HEC)

Hydroxyethyl cellulose(HEC) bụ mmiri na-agbaze mmiri, polymer na-abụghị ionic nke sitere na cellulose, polysaccharide eke dị na mgbidi cell osisi. Site na mgbanwe kemịkalụ - dochie otu hydroxyl na cellulose na otu hydroxyethyl - HEC na-enweta nkwalite solubility, nkwụsi ike, na ntụgharị. N'ịbụ ndị a na-ejikarị eme ihe n'ofe ụlọ ọrụ, HEC na-eje ozi dị ka ihe mgbakwunye dị egwu na-ewu, ọgwụ, ihe ịchọ mma, nri, na mkpuchi. Ntuziaka a na-enyocha kemịkalụ ya, ihe onwunwe ya, ngwa ya, uru ya na usoro n'ọdịnihu.

2. Chemical Structure na Production

2.1 Ọdịdị Molecular

Ọkpụkpụ azụ HEC nwere β- (1 → 4) -njikọ D-glucose nkeji, yana otu hydroxyethyl (-CH2CH2OH) nọchiri ọnọdụ hydroxyl (-OH). Ogo nke nnọchi (DS), nke na-abụkarị 1.5-2.5, na-ekpebi ihe solubility na viscosity.

2.2 Usoro nchịkọta

HECA na-emepụta ya site na mmeghachi omume alkali-catalyzed nke cellulose na ethylene oxide:

  1. Alkalization: A na-emeso cellulose na sodium hydroxide iji mepụta cellulose alkali.
  2. Etherification: Emeghachiri ya na ethylene oxide iji webata otu hydroxyethyl.
  3. Neutralization & Ịdị Ọcha: Acid na-ewepụ alkali fọdụrụnụ; A na-asacha ngwaahịa ahụ ma kpoo ya na ntụ ntụ dị mma.

3. Njirimara igodo nke HEC

3.1 Mmiri Solubility

  • Na-agbaze na mmiri ọkụ ma ọ bụ oyi, na-emepụta ngwọta doro anya, viscous.
  • Ọdịdị na-abụghị ionic na-eme ka ndakọrịta na electrolytes na nkwụsi ike pH (2-12).

3.2 Ọkpụkpụ & Njikwa Rheology

  • Na-arụ ọrụ dị ka pseudoplastic thickener: Nnukwu viscosity na izu ike, mbelata viscosity n'okpuru shiee (dịka ọmụmaatụ, ịgbapụta, ịgbasa).
  • Na-enye nguzogide sag na ngwa kwụ ọtọ (dịka ọmụmaatụ, adhesives tile).

3.3 Njide mmiri

  • Na-etolite ihe nkiri colloidal, na-ebelata evaporation mmiri na sistemu cimenti maka hydration kwesịrị ekwesị.

3.4 Thermal kwụsie ike

  • Na-ejigide viscosity n'ofe okpomọkụ (-20°C ruo 80°C), dị mma maka mkpuchi mpụga na nrapado.

3.5 Ịme ihe nkiri

  • Na-emepụta ihe nkiri na-agbanwe agbanwe, na-adịgide adịgide na agba na ihe ịchọ mma.

4. Ngwa nke HEC

4.1 Ụlọ ọrụ ihe owuwu

  • Tile Adhesives & Grouts: Na-eme ka oge mepere emepe, nrapado, na nguzogide sag (0.2-0.5% usoro onunu ogwu).
  • Simenti Mortars & Plasters: Na-eme ka arụ ọrụ dịkwuo mma ma na-ebelata mgbawa (0.1-0.3%).
  • Ngwaahịa Gypsum: Na-achịkwa ịtọ oge na mbelata na ogige nkwonkwo (0.3-0.8%).
  • Sistemụ Mkpuchi Mpụga (EIFS): Na-akwalite ịdịte aka nke mkpuchi polymer gbanwere.

4.2 ọgwụ

  • Mbadamba ụrọ mbadamba: Na-eme ka mkpịsị ọgwụ na mgbaze.
  • Ngwọta Ophthalmic: Na-ete mmanụ ma na-eme ka mmiri doo anya.
  • Usoro mwepụta-achịkwa: Na-agbanwe ọnụego mwepụta ọgwụ.

4.3 Ihe ịchọ mma & Nlekọta onwe onye

  • Shampoos & Lotions: Na-enye viscosity na stabilizes emulsions.
  • Ude: na-eme ka mgbasawanye na njigide mmiri.

4.4 Ụlọ ọrụ nri

  • Thickener & Stabilizer: A na-eji ya na sauces, ngwaahịa mmiri ara ehi, na ngwaahịa esi nri na-enweghị gluten.
  • Ihe ngbanwe abụba: na-eṅomi udidi na nri nwere obere kalori.

4.5 Agba & mkpuchi

  • Rheology Modifier: Na-egbochi ntapu na agba dabere na mmiri.
  • Nkwusioru pigmenti: Na-eme ka ahụ dị ike maka nkesa agba.

4.6 Ojiji ndị ọzọ

  • Mmiri na-egwupụta mmanụ: Na-achịkwa mfu mmiri na-egwupụta apịtị.
  • Ink mbipụta: Na-edozi viscosity maka mbipụta ihuenyo.

5. Uru nke HEC

  • Multifunctionality: Na-ejikọta ndim, njide mmiri, na imepụta ihe nkiri n'otu mgbakwunye.
  • Ọnụ ahịa-arụmọrụ: Obere usoro onunu ogwu (0.1-2%) na-enye nkwalite arụmọrụ dị ukwuu.
  • Eco-Friendly: Biodegradable na nke sitere na cellulose emeghari ohuru.
  • Ndakọrịta: Na-arụ ọrụ na salts, surfactants, na polymers.

6. Nka na ụzụ echiche

6.1 Ntuziaka usoro onunu ogwu

  • Ihe owuwu: 0.1-0.8% site na ibu.
  • Ihe ịchọ mma: 0.5-2%.
  • Ọgwụ: 1-5% na mbadamba.

6.2 Ngwakọta & Mgbasa

  • Buru ụzọ gwakọta ntụ ntụ akọrọ iji gbochie nhịkọ.
  • Jiri mmiri ọkụ (≤40°C) maka mgbaze ngwa ngwa.

6.3 Nchekwa

  • Chekwaa n'ime akpa mkpuchi mkpuchi na <30°C na iru mmiri <70%.

7. Ihe ịma aka na oke

  • Ọnụ: Dị ọnụ karịamethylcellulose(MC) mana akwadoro ya site na arụmọrụ dị elu.
  • N'ofe oke: oke HEC nwere ike igbochi ngwa ma ọ bụ ihicha.
  • Ntọala nkwụghachi azụ: Na ciment, nwere ike ịchọ ngwa ngwa (dịka ọmụmaatụ, calcium formate).

8. Ọmụmụ ihe gbasara ikpe

  1. Tile Adhesives na-arụ ọrụ dị elu: Adhesives dabeere na HEC na Burj Khalifa nke Dubai guzogidere okpomọkụ 50ºC, na-enye ohere itinye tile kpọmkwem.
  2. Eco-Friendly Paints: Akara Europe ji HEC dochie ihe ndị na-emepụta sịntetik, na-ebelata ikuku VOC site na 30%.

9. Ụdị Ọdịnihu

  • Green HEC: Mmepụta sitere na ihe mkpofu ọrụ ugbo emegharịgharịrị (dịka ọmụmaatụ, igbe osikapa).
  • Ihe eji eme ihe: Okpomọkụ/pH na-anabata HEC maka nnyefe ọgwụ na-agbanwe agbanwe.
  • Nanocomposites: HEC jikọtara ya na nanomaterials maka ihe owuwu siri ike.

Ntuziaka zuru oke maka HEC (Hydroxyethyl Cellulose)

Ngwakọta pụrụ iche nke HEC nke solubility, nkwụsi ike, na ịdị iche iche na-eme ka ọ dị mkpa n'ofe ụlọ ọrụ. Site na nrapado skyscraper gaa na ọgwụ na-azọpụta ndụ, ọ na-ejikọta arụmọrụ na nkwado. Ka nyocha na-aga n'ihu,HECga-aga n'ihu na-akwalite mmepụta ihe ọhụrụ na sayensị ihe onwunwe, na-akwado ọrụ ya dị ka ụlọ ọrụ mmepụta ihe nke narị afọ nke 21.

TDS KimaCell HEC HS100000

Oge nzipu: Mar-26-2025
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