Hydroxyethylcellulose (HEC) bụ polymer soluble mmiri nke a na-ejikarị n'ọtụtụ ụlọ ọrụ mmepụta ihe na ngwaahịa ndị ahịa kwa ụbọchị, ọkachasị na ngwaahịa nlekọta onwe onye na ncha. Ọ nwere ezigbo mkpụkọ, nkwusioru, emulsifying, imepụta ihe nkiri na ọrụ colloid na-echebe ya, yabụ a na-ejikarị ya dị ka ihe ncha na ncha mmiri mmiri.
1. Ọdịdị na Njirimara nke hydroxyethyl cellulose
HEC bụ ihe nrụpụta nonionic enwetara site na cellulose site na mmeghachi omume etherification ma nwee ike hydration siri ike na hydrophilicity. Agbụ mkpụrụ ndụ nke HEC nwere ọtụtụ hydroxyethyl dị iche iche na-edochi atom hydrogen nke cellulose eke, na-akpụ usoro nke usoro molekụla ogologo ogologo. Usoro ihe omimi a na-enye ohere HEC ngwa ngwa zaa na mmiri iji mepụta ngwọta viscous edo.
Otu ihe dị mkpa nke HEC bụ ngbanwe ya na ụkpụrụ pH dị iche iche. Ọ na-ejigide mmetụta ya nke ukwuu n'ofe pH dị ukwuu, na-enye ya uru dị ukwuu na ngwaahịa dị ka ncha mmiri mmiri, nke nwere ike inwe ọtụtụ ihe na-arụ ọrụ na mgbanwe pH. Tụkwasị na nke ahụ, HEC nwekwara ezigbo bioacompatibility na nchekwa, ọ dịkwa mma maka iji ngwaahịa dị iche iche na-abanye na ahụ mmadụ, dị ka ncha mmiri mmiri, ncha ntutu, wdg.
2. Usoro nke siri ike nke hydroxyethyl cellulose na ncha mmiri mmiri
N'ime usoro ncha mmiri mmiri, usoro bụ isi nke HEC dị ka onye na-esi ísì ụtọ bụ ịbawanye viscosity nke ncha mmiri mmiri site na igbari n'ime mmiri iji mepụta ngwọta viscous. Kpọmkwem, mgbe HEC gbazere na mmiri, ụdọ molekụla ya na-ejikọta ya na ụmụ irighiri mmiri site na njikọ intermolecular hydrogen iji mepụta usoro netwọk dị mgbagwoju anya. Usoro netwọk a nwere ike jikọta ọnụ ọgụgụ dị ukwuu nke mmiri mmiri, si otú ahụ na-abawanye viscosity nke ngwọta.
Mmetụta dị ukwuu nke HEC nwere njikọ chiri anya na ịdị arọ ya na ego mgbakwunye ya. N'ikwu okwu n'ozuzu, ka ịdị arọ nke molekụla HEC dịkwuo elu, ka viscosity nke ngwọta ahụ dị elu; N'otu oge ahụ, ka elu nke HEC dị na ngwọta, otú ahụ ka ọ ga-esi pụta ìhè mmetụta nke na-egbuke egbuke. Otú ọ dị, na ngwa ndị bara uru, ntinye uche HEC dị elu nwere ike ime ka ngwọta ahụ dị oke viscous ma na-emetụta ahụmahụ onye ọrụ, n'ihi ya, ọ dị mkpa ka ejiri nlezianya chịkwaa ya n'oge nhazi nhazi.
3. Uru nke HEC thickening mmetụta
HEC nwere ọtụtụ uru dị ịrịba ama karịa ndị ọzọ thickeners. Nke mbụ, ọ nwere ezigbo mmiri solubility ma nwee ike igbari ngwa ngwa na mmiri oyi ma ọ bụ mmiri ọkụ ma mepụta ngwọta viscous edo. Nke abuo, HEC ọ bụghị nanị na thickens n'ụzọ dị irè na ala mkpokọta, ma na-enye a kwụsiri ike ndim mmetụta, nke dị mkpa karịsịa na mmiri mmiri ncha ngwaahịa na-achọ ogologo oge nchekwa. Nke atọ, dị ka onye na-abụghị ionic thickener, HEC nwere ike ịnọgide na-enwe viscosity kwụsiri ike n'okpuru ọnọdụ pH dị iche iche na ihe ndị ọzọ dị na sistemụ anaghị emetụta ya ngwa ngwa.
4. Ngwa ngwa nke HEC na nhazi ncha mmiri mmiri
Na mmepụta n'ezie, a na-agbakwunye HEC na nhazi ncha mmiri mmiri n'ụdị ntụ ntụ. Iji jide n'aka na HEC nwere ike ịgbari n'ụzọ zuru ezu ma na-arụ ọrụ ya, ọ na-adịkarị mkpa ịṅa ntị na ịdị n'otu nke ngwakọta mgbe ị na-agbakwunye HEC iji zere agglomeration. Na mgbakwunye, iji nwetakwuo ọrụ nke ncha mmiri mmiri, a na-ejikarị HEC na-ejikọta ya na ndị ọzọ na-agba agba, humectants ma ọ bụ surfactants iji nweta ọdịdị ngwaahịa dị mma na ahụmahụ onye ọrụ.
Dị ka onye na-arụ ọrụ nke ọma, hydroxyethyl cellulose nwere atụmanya ngwa sara mbara na ncha mmiri mmiri. Ọ nwere ike ịbawanye viscosity ngwaahịa nke ukwuu ma melite ahụmịhe onye ọrụ. Ọ nwekwara ezigbo ndakọrịta na nkwụsi ike ma bụrụ ezigbo nhọrọ maka ịgbanye ncha mmiri mmiri.
Oge nzipu: Ọgọst-19-2024