Fojusi lori awọn ethers Cellulose
English

Awọn itọnisọna okeerẹ si HEC

AItọsọna okeerẹ si HEC (Hydroxyethyl Cellulose)

1. Ifihan si Hydroxyethyl Cellulose (HEC)

Hydroxyethyl Cellulose(HEC) jẹ omi-tiotuka, polima ti kii-ionic ti o wa lati cellulose, polysaccharide adayeba ti a rii ni awọn odi sẹẹli ọgbin. Nipasẹ iyipada kemikali-rọpo awọn ẹgbẹ hydroxyl ni cellulose pẹlu awọn ẹgbẹ hydroxyethyl-HEC awọn anfani imudara solubility, iduroṣinṣin, ati versatility. Ti a lo jakejado awọn ile-iṣẹ, HEC ṣe iranṣẹ bi aropọ to ṣe pataki ni ikole, awọn oogun, awọn ohun ikunra, ounjẹ, ati awọn aṣọ. Itọsọna yii ṣawari kemistri rẹ, awọn ohun-ini, awọn ohun elo, awọn anfani, ati awọn aṣa iwaju.

2. Kemikali Be ati Production

2.1 Molikula Be

Egungun ẹhin HEC ni β- (1 → 4) ti o ni asopọ D-glucose sipo, pẹlu awọn ẹgbẹ hydroxyethyl (-CH2CH2OH) ti o rọpo awọn ipo hydroxyl (-OH). Iwọn aropo (DS), ni deede 1.5–2.5, pinnu isokan ati iki.

2.2 Ilana Afoyemọ

HECTi ṣejade nipasẹ ifaseyin alkali-catalyzed ti cellulose pẹlu ohun elo afẹfẹ ethylene:

  1. Alkalization: A ṣe itọju cellulose pẹlu iṣuu soda hydroxide lati dagba cellulose alkali.
  2. Etherification: Reacted pẹlu ethylene oxide lati ṣafihan awọn ẹgbẹ hydroxyethyl.
  3. Neutralization & Mimo: Acid yomi aloku alkali; A fọ ọja naa ati ki o gbẹ sinu erupẹ ti o dara.

3. Awọn ohun-ini bọtini ti HEC

3.1 Omi Solubility

  • Dissolves ni gbona tabi tutu omi, lara ko o, viscous solusan.
  • Iseda ti kii ṣe ionic ṣe idaniloju ibamu pẹlu awọn elekitiroti ati iduroṣinṣin pH (2-12).

3.2 Thicking & Rheology Iṣakoso

  • Awọn iṣẹ bi pseudoplastic thickener: Giga iki ni isinmi, dinku iki labẹ irẹrun (fun apẹẹrẹ, fifa, ntan).
  • Pese resistance sag ni awọn ohun elo inaro (fun apẹẹrẹ, awọn adhesives tile).

3.3 Omi idaduro

  • Fọọmu fiimu colloidal kan, fifalẹ evaporation omi ni awọn ọna ṣiṣe cementious fun hydration to dara.

3.4 Gbona Iduroṣinṣin

  • Ṣe idaduro iki kọja awọn iwọn otutu (-20°C si 80°C), apẹrẹ fun awọn aṣọ ita ati awọn adhesives.

3.5 Fiimu-Ṣiṣe

  • Ṣẹda rọ, awọn fiimu ti o tọ ni awọn kikun ati awọn ohun ikunra.

4. Awọn ohun elo ti HEC

4.1 ikole Industry

  • Tile Adhesives & Grouts: Ṣe ilọsiwaju akoko ṣiṣi, adhesion, ati resistance sag (0.2-0.5% doseji).
  • Simenti Mortars & Plasters: Ṣe ilọsiwaju iṣẹ ṣiṣe ati dinku idinku (0.1-0.3%).
  • Awọn ọja Gypsum: Awọn iṣakoso akoko iṣeto ati isunki ni awọn agbo ogun apapọ (0.3-0.8%).
  • Awọn ọna Idabobo ita (EIFS): Ṣe alekun agbara ti awọn aṣọ ti a ti yipada polymer.

4.2 Pharmaceuticals

  • Tabulẹti Binder: Mu oogun pọ si ati itu.
  • Awọn solusan Ophthalmic: Awọn lubricates ati ki o nipọn oju silė.
  • Awọn agbekalẹ Itusilẹ Iṣakoso-Iṣakoso: Ṣe atunṣe awọn oṣuwọn idasilẹ oogun.

4.3 Kosimetik & Itọju ara ẹni

  • Shampoos & Lotions: Pese iki ati stabilizes emulsions.
  • Awọn ipara: Ṣe ilọsiwaju itankale ati idaduro ọrinrin.

4.4 Food Industry

  • Thickener & Stabilizer: Ti a lo ninu awọn obe, awọn ọja ifunwara, ati awọn ọja didin ti ko ni giluteni.
  • Fidipo Ọra: Mimics sojurigindin ni awọn ounjẹ kalori-kekere.

4.5 Awọn kikun & Awọn aṣọ

  • Atunṣe Rheology: Ṣe idilọwọ awọn ṣiṣan ni awọn kikun ti omi.
  • Idaduro Pigment: Ṣe idaduro awọn patikulu fun paapaa pinpin awọ.

4.6 Miiran Nlo

  • Awọn Omi Liluho Epo: Ṣakoso pipadanu omi ninu awọn ẹrẹ liluho.
  • Awọn inki titẹ sita: Ṣe atunṣe iki fun titẹ iboju.

5. Awọn anfani ti HEC

  • Multifunctionality: Darapọ nipọn, idaduro omi, ati ṣiṣe fiimu ni afikun kan.
  • Ṣiṣe-iye-iye: Iwọn kekere (0.1-2%) n pese awọn ilọsiwaju iṣẹ ṣiṣe pataki.
  • Eco-Friendly: Biodegradable ati yo lati cellulose isọdọtun.
  • Ibamu: Nṣiṣẹ pẹlu iyọ, surfactants, ati awọn polima.

6. Imọ ero

6.1 Awọn ilana iwọn lilo

  • Ikole: 0.1-0.8% nipa iwuwo.
  • Kosimetik: 0.5-2%.
  • Awọn oogun: 1-5% ninu awọn tabulẹti.

6.2 Dapọ & Itu

  • Ṣaju-ọpọlọpọ pẹlu awọn erupẹ gbigbẹ lati ṣe idiwọ clumping.
  • Lo omi gbona (≤40°C) fun itusilẹ yiyara.

6.3 Ibi ipamọ

  • Fipamọ sinu awọn apoti edidi ni <30°C ati <70% ọriniinitutu.

7. Awọn italaya ati Awọn idiwọn

  • Iye owo: Iye owo jumethylcellulose(MC) ṣugbọn lare nipa superior išẹ.
  • Ju-nipọn: Excess HEC le di ohun elo tabi gbigbe.
  • Eto Idaduro: Ninu simenti, o le nilo awọn accelerators (fun apẹẹrẹ, calcium formate).

8. Awọn Iwadi Ọran

  1. Awọn Adhesives Tile Iṣẹ-giga: Awọn alemora ti o da lori HEC ni Burj Khalifa ti Dubai duro ni igbona 50°C, ti n mu aaye tile to peye ṣiṣẹ.
  2. Awọn awọ-ọrẹ Eco: Aami European kan lo HEC lati rọpo awọn ohun ti o nipọn sintetiki, idinku awọn itujade VOC nipasẹ 30%.

9. Future lominu

  • Alawọ ewe HEC: Iṣelọpọ lati idoti ogbin ti a tunlo (fun apẹẹrẹ, husks iresi).
  • Awọn ohun elo Smart: Iwọn otutu/HEC ti o dahun pH fun ifijiṣẹ oogun adaṣe.
  • Nanocomposites: HEC ni idapo pelu nanomaterials fun okun ikole ohun elo.

Itọsọna pipe si HEC (Hydroxyethyl Cellulose)

Apapọ alailẹgbẹ HEC ti solubility, iduroṣinṣin, ati isọpọ jẹ ki o ṣe pataki kọja awọn ile-iṣẹ. Lati adhesives skyscraper si awọn oogun igbala-aye, o ṣe afara iṣẹ ati iduroṣinṣin. Bi iwadi ṣe nlọsiwaju,HECyoo tẹsiwaju lati wakọ ĭdàsĭlẹ ni imọ-ẹrọ ohun elo, ni mimu ipa rẹ ṣiṣẹ gẹgẹbi ipilẹ ile-iṣẹ ti 21st-ọdun 21st.

TDS KimaCell HEC HS100000

Akoko ifiweranṣẹ: Mar-26-2025
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