Hydroxyethyl cellulose (HEC) bụ polymer na-abụghị ionic, mmiri-soluble polima nke sitere na cellulose. A na-eji ya eme ihe n'ọtụtụ ụlọ ọrụ mmepụta ihe dị iche iche n'ihi ihe ndị pụrụ iche ya, karịsịa na nhazi nke adhesives. Nkwụsi ike nke adhesives na ikike ha iji jide mmiri dị oke mkpa maka ịrụ ọrụ ha, HEC na-ekerekwa òkè dị ukwuu n'ịkwalite akụkụ ndị a.
Ọdịdị kemịkalụ na Njirimara nke Hydroxyethyl Cellulose
A na-emepụta HEC site na mmeghachi omume nke cellulose na ethylene oxide, na-ebute ether cellulose na ìgwè hydroxyethyl. Nke a mgbanwe enhances solubility nke cellulose na mmiri na-abawanye ya viscosity. Ogo nke nnọchi (DS) na ngbanwe molar (MS) nke otu hydroxyethyl na ọkpụkpụ azụ cellulose na-ekpebi njirimara nke HEC. Na-emekarị, DS na MS dị elu na-ebute mmụba mmiri na viscosity, na-eme ka HEC bụrụ ihe na-eme ka ọ dị mma na-eme ka ọ dị mma.
Usoro nke nrapado kwụsie ike
Nkwụsi ike nke nrapado na-ezo aka n'ikike nke nhazi ihe nrapado iji nọgide na-agbanwe agbanwe, ịdị n'otu, na njirimara arụmọrụ ya ka oge na-aga. Ọtụtụ ihe na-enye aka na nkwụsi ike nke nrapado, gụnyere njirimara rheological, iguzogide nkewa nke oge, yana ndakọrịta na ihe ndị ọzọ.
Njirimara Rheological
Njirimara rheological nke adhesives, dị ka viscosity na akparamagwa ịkpa agwa, dị oke mkpa maka ngwa na arụmọrụ ha. HEC na-eme ka ihe ndị a dịkwuo mma site n'ịmepụta usoro netwọk n'ime matriks nrapado. Agbụ polymer nke HEC na-ejikọta ibe ya na ihe ndị na-ejikọta ya, na-emepụta ngwọta viscous nke na-eguzogide mmiri n'okpuru ọnọdụ dị ala ma na-aghọ obere viscous n'okpuru akwa shear. Omume a na-akpụ akpụ na-aba uru n'oge a na-etinye ihe nkedo, n'ihi na ọ na-enye ohere maka ịgbasa na nhazi dị mfe ma na-ejigide nkwụsi ike ozugbo etinyere ya.
Nguzogide nkewa nkebi
Nkewa nke oge na nrapado nwere ike ime n'ihi enweghị nkwekọrịta nke akụkụ dị iche iche ma ọ bụ n'ihi mgbanwe na ọnọdụ gburugburu ebe obibi dị ka okpomọkụ na iru mmiri. HEC na-enyere aka igbochi nkewa nke oge site n'ime ihe dị ka colloidal stabilizer. Ọdịdị hydrophilic ya na-enye ya ohere iji mmiri na ihe ndị ọzọ na-emepụta ihe na-emekọ ihe, na-emepụta ngwakọta homogenous. Na mgbakwunye, ịdị arọ molekụla dị elu nke HEC na-enye nkwụsi ike siri ike, na-ebelata ohere nkewapụ oge ka oge na-aga.
Ndakọrịta na akụrụngwa ndị ọzọ
HEC dakọtara na ọtụtụ ihe nrapado dị iche iche, gụnyere resins, fillers, na ihe mgbakwunye ndị ọzọ. Nkwekọrịta a na-eme ka HEC nwee ike itinye ngwa ngwa n'ime usoro nrapado dị iche iche na-enweghị emetụta arụmọrụ ha. Ọzọkwa, HEC nwere ike welie mgbasa nke fillers na ndị ọzọ siri ike irighiri n'ime nrapado, na-atụnye a ọzọ edo na kwụsiri ike ngwaahịa.
Ihe Njide Mmiri
Njide mmiri bụ ihe dị oke mkpa maka ọtụtụ ngwa nrapado, ọkachasị ndị metụtara ihe ndị nwere oghere ma ọ bụ ogologo oge oghere. HEC na-eme ka ike njigide mmiri nke adhesives dịkwuo elu site n'ọtụtụ usoro.
Hydrophilicity na njikọ mmiri
HEC bụ nnukwu hydrophilic, nke pụtara na ọ nwere njikọ siri ike maka mmiri. Ngwongwo a na-enye HEC ohere ịbanye na idobe nnukwu mmiri n'ime matriks nrapado. Otu hydroxyethyl dị na ọkpụkpụ azụ cellulose na-eme njikọ hydrogen na ụmụ irighiri mmiri, na-ejide ha nke ọma ma na-ebelata ọnụ ọgụgụ nke evaporation mmiri. Nke a dị mkpa karịsịa na ngwa ebe idowe obere mmiri dị mkpa maka ịrụ ọrụ nrapado ahụ.
Nhazi ihe nkiri na mgbochi mmiri
Na mgbakwunye na mmiri na-ejikọta, HEC na-enye aka n'ịmepụta ihe nkiri na-aga n'ihu n'elu nrapado. Ihe nkiri a na-eme dị ka ihe mgbochi nke mmiri ozuzo, na-eme ka njigide mmiri dịkwuo elu. Ikike imepụta ihe nkiri nke HEC bara uru na ngwa ebe achọrọ ogologo oge mepere emepe, dị ka na nrapado akwụkwọ ahụaja na nrapado tile. Site n'ibelata evaporation nke mmiri, HEC na-ahụ na nrapado na-anọgide na-arụ ọrụ ruo ogologo oge, na-enye ohere maka mgbanwe na ngbanwe nke ihe ejikọtara.
Mmetụta na oge ihicha na ike nrapado
Ihe njide mmiri nke HEC na-emetụtakwa oge ihicha na ike ikpeazụ nke adhesives. Site n'ijigide mmiri n'ime matrix adhesive, HEC na-achịkwa ọnụ ọgụgụ nke mmiri na-efunahụ, na-eduga n'usoro ihicha na-achịkwa na otu. Nke a na-achịkwa ihicha dị mkpa maka inweta ezigbo ike nrapado, n'ihi na ọ na-enye ohere maka ịmepụta ihe nkiri kwesịrị ekwesị na ijikọta ya na mkpụrụ. Nhicha ngwa ngwa nwere ike ime ka agbụ na-adịghị ike na nkwụsịtụ na-adịghị mma, ebe usoro ikpo ọkụ na-achịkwa nke HEC kwadoro na-eme ka nkwonkwo nrapado siri ike ma na-adịgide adịgide.
Ngwa nke HEC na Adhesives
A na-eji HEC n'ọtụtụ ngwa nrapado, gụnyere:
Adhesives ihe owuwu: A na-ejikarị HEC eme ihe na nrapado ihe owuwu maka njide mmiri ya na ihe na-eme ka ọ sie ike, na-eme ka agbụ siri ike na nke na-adịgide adịgide na ihe ụlọ.
Akwụkwọ ahụaja Adhesives: Ikike nke HEC iji jide mmiri na inye ogologo oge oghere na-eme ka ọ dị mma maka nrapado akwụkwọ ahụaja, na-enye ohere maka ngwa ngwa na mgbanwe dị mfe.
Tile Adhesives: Na tile adhesives, HEC na-eme ka arụ ọrụ na ntanye dịkwuo mma site n'ịkwado ọdịnaya mmiri dị mkpa maka nhazi na njikọ kwesịrị ekwesị.
Adhesives nkwakọ ngwaahịa: HEC na-eme ka arụmọrụ nke ntanye nkwakọ ngwaahịa dịkwuo mma site n'ịkwalite nkwụsi ike ha na iguzogide nkewa nke oge, na-eme ka ịdị mma na arụmọrụ na-agbanwe agbanwe.
Hydroxyethyl cellulose na-arụ ọrụ dị mkpa n'ịkwalite nkwụsi ike na njide mmiri nke nrapado. Ọdịdị kemịkal ya pụrụ iche na ihe onwunwe ya na-enye aka mee ka àgwà rheological dịkwuo mma, iguzogide nkewa nke oge, yana ndakọrịta na ihe nrapado dị iche iche. Na mgbakwunye, ike hydrophilicity na ike imepụta ihe nkiri nke HEC na-eme ka njide mmiri dịkwuo mma, na-eduga n'ịchịkwa nke ọma n'oge ihicha na ike nrapado. Ntughari na ịdị irè nke HEC na-eme ka ọ bụrụ ihe dị oké ọnụ ahịa na ịmepụta ihe dị iche iche nke adhesives, na-eme ka arụmọrụ ha na ntụkwasị obi dị na ngwa dị iche iche.
Oge nzipu: Jun-02-2024