Yintoni uhlobo lweHydroxyethyl Methyl Cellulose

I-Hydroxyethyl Methyl Cellulose (HEMC) i-cellulose ether derivative, efana ne-Hydroxypropyl Methylcellulose (HPMC), eneempawu ezizodwa ezivela kwisakhiwo sayo sekhemikhali. Nantsi isishwankathelo sobume beHydroxyethyl Methyl Cellulose:

1. Ulwakhiwo lweMichiza:

I-HEMC idityaniswe ngokuguqula i-cellulose ngokuphendula kweekhemikhali, ngokukodwa ngokuzisa zombini i-hydroxyethyl (-CH2CH2OH) kunye namaqela e-methyl (-CH3) kwi-cellulose backbone. Esi sakhiwo sekhemikhali sinikeza i-HEMC iimpawu zayo ezicacileyo kunye nokusebenza.

2. Ubume be-Hydrophilic:

Njengezinye i-cellulose ethers, i-HEMC i-hydrophilic, oku kuthetha ukuba inobudlelwane namanzi. Xa ihlakazekile emanzini, i-molecule ze-HEMC i-hydrate kwaye yenze isisombululo se-viscous, igalelo ekuqinisweni kwayo kunye neempawu zokubopha. Olu hlobo lwe-hydrophilic luvumela i-HEMC ukuba ifunxe kwaye igcine amanzi, iphucula ukusebenza kwayo kwizicelo ezahlukeneyo.

3. Ukunyibilika:

I-HEMC iyanyibilika emanzini, yenza izisombululo ezicacileyo, ezicacileyo. Iqondo lokunyibilika lixhomekeke kwizinto ezifana nobunzima bemolekyuli, iqondo lokuthatha indawo, kunye nobushushu. Izisombululo ze-HEMC zinokuhlukana kwesigaba okanye i-gelation phantsi kweemeko ezithile, ezinokuthi zilawulwe ngokulungelelanisa iiparitha zokuqulunqa.

4. IiPropati zeRheological:

I-HEMC ibonisa ukuziphatha kwe-pseudoplastic, oku kuthetha ukuba i-viscosity yayo iyancipha phantsi koxinzelelo lwe-shear. Le propati ivumela izisombululo ze-HEMC ukuba zihambe ngokulula ngexesha lokufaka isicelo kodwa ziqina xa zimile okanye ziphumle. Iimpawu ze-rheological ze-HEMC zinokulungelelaniswa ngokuhlengahlengisa izinto ezinje ngoxinaniso, ubunzima bemolekyuli, kunye nenqanaba lokutshintsha.

5. Ukwenza ifilimu:

I-HEMC inezakhiwo zokwenza ifilimu, eyivumela ukuba yenze iifilimu eziguquguqukayo kunye nezidibeneyo xa zomiswe. Ezi filimu zibonelela ngeepropati zomqobo, ukubambelela, kunye nokukhusela kwi-substrates kwizicelo ezahlukeneyo. Ikhono lokwenza ifilimu ye-HEMC igalelo ekusetyenzisweni kwayo kwi-coatings, i-adhesives, kunye nezinye iifomyula.

6. Uzinzo lweThermal:

I-HEMC ibonisa ukuzinza okuhle kwe-thermal, ukumelana nokushisa okuphezulu ngexesha lokucubungula nokugcinwa. Ayithobi okanye ilahlekelwe ziipropati zayo zokusebenza phantsi kweemeko eziqhelekileyo zokuvelisa. Oku kuzinza kwe-thermal kuvumela i-HEMC ukuba isetyenziswe ekuqulunqweni okufudumeza okanye ukunyanga iinkqubo.

7. Ukuhambelana:

I-HEMC iyahambelana noluhlu olubanzi lwezinye izinto, kubandakanya izinyibilikisi zendalo, ii-surfactants, kunye neepolima. Inokuthi ifakwe kwiifomyula kunye nezongezo ezahlukeneyo ngaphandle kokunxibelelana okubalulekileyo. Oku kuhambelana kuvumela i-HEMC ukuba isetyenziswe kwizicelo ezahlukeneyo kumashishini ahlukeneyo.

Isiphelo:

I-Hydroxyethyl Methyl Cellulose (HEMC) yi-ether ye-cellulose eguquguqukayo eneempawu ezizodwa ezenza ukuba zixabiseke kumashishini ahlukeneyo. Ubume bayo be-hydrophilic, ukunyibilika, iipropathi ze-rheological, isakhono sokwenza ifilimu, ukuzinza kwe-thermal, kunye nokuhambelana negalelo ekusebenzeni kwayo kwizicelo ezifana neengubo, izinto zokuncamathelisa, izinto zokwakha, iimveliso zokhathalelo lomntu, kunye namayeza. Ngokuqonda ubume be-HEMC, abaqulunqi banokukwandisa ukusetyenziswa kwayo ekuqulunqeni ukufezekisa iimpawu zokusebenza ezifunwayo kunye nokusebenza kwemveliso.