Mmiri na-agbasa mmiri nke cellulose nke ahụ na-emetụta oke okpomọkụ. N'ikwu okwu n'ozuzu, a na-azọ ndị kasị kuluosụ na-anwụ na mmiri na obere okpomọkụ. Mgbe ọnọdụ okpomọkụ na-ebili, onye na-eso ụzọ ha na-aghọkwa ogbenye ma mesịa ghọọ ahụhụ. Ọnọdụ okpomọkụ dị oke mkpa (LCST: Ọnọdụ dị oke mkpa iji mara mgbanwe nke cellulose na-agbanwe, nke ahụ bụ, nke dị oke mkpa okpomọkụ, nke dị elu na-enweghị isi na mmiri.
A na-ekpochapụ ikpo ọkụ nke ihe ngwọta nke ọrịa emewo ka a mụọ ma usoro nke mgbanwe ahụ akọwapụtara. Dịka anyị kwuru n'elu, mgbe ihe ngwọta nke methylcellose dị obere okpomọkụ, macromolecules jupụtara na mmiri molecules gbara gburugburu iji mepụta ihe owuwu. A ga-ebibi okpomọkụ etinyere na ọnọdụ okpomọkụ ga-agbaji nkekọ hydrogen n'etiti otu moldlen, ebe a na-ekpuchi mmiri na-enweghị mmiri, nke na-eme ka o kwe omume ịkwadebe na study the hydrophobic association of hydroxypropyl methylcellulose thermally induced hydrogel. Ọ bụrụ na otu methyy na otu molecular yinye a na-ejikọ ya na nchịkọta a, mmekọrịta a ga-eme ka molekule niile pụta. Agbanyeghị, mmụba nke okpomọkụ ga-esiwanye ike ngagharị nke otu agbụ, mmekọrịta hydrophobic na molekular ga-agbanwe site na steeti ahụ na-eme ka enwee ike iru ala. N'oge a, mmekọrịta hydrophobic dị n'etiti ụmụ irighiri ihe na-amalite ịchị. Mgbe ọnọdụ okpomọkụ na-acha, na-acha, a na-agbajikwa ihe ndị ọzọ na-eme, na cellulose nke dị nso na ibe ha na-ezukọ na-ezukọ na-etolite nchịkọta hydrophobic. Site na mmụba ọzọ na okpomọkụ, n'ikpeazụ, a na-agbaji ngwa agha hydrogen niile, yana mkpakọrịta ya hydrophobic ruru ogo, na-abawanye ọnụ ọgụgụ na nha nke mkpokọta hydrophobic. N'oge usoro a, methylcelllose na-eme nke nta nke nta na-enweghị isi na mgbe niile kpamkpam na mmiri. Mgbe ọnọdụ okpomọkụ na-ebili ruo n'ókè nke netwọọdụ network atọ dị n'etiti Macromolecules, ọ dị ka etolite gel macroscoopically.
Jun Geo na George Highr et al al achoputala onodu okpukpo nke hydroxypropyyl, ma chekwaa na obere ihe di nkpa okpomoku nke hydropyl cellulose bụ ihe dị ka 410c. Na okpomọkụ dị ala karịa 390c, otu molecular yinye nke celdropy na-enweghị usoro, na nkesa hydrodynation nke ụmụ irighiri ihe, enweghị nchịkọta n'etiti Macromolecules. Mgbe ọnọdụ okpomọkụ na-abawanye na 390c, mmekọrịta hydrophobic n'etiti ụdọ akwara na-esikwu ike, macromolecules chịkọtara, na mmiri nke polymen dara ogbenye. Agbanyeghị, na ọnọdụ okpomọkụ a, ọ bụ naanị akụkụ obere nke celdropy cellulose modecuse na-etolite ihe mkpokọta nwere naanị ole na ole walecular ka nọ na steeti a chụpụrụ adọ. Mgbe ọnọdụ okpomọkụ ahụ na-ebili ruo 400c, karịa macromolecules ka ukwuu na-ekere ọnụ nke nchịkọta, ma na-akawanye njọ, ma n'oge a, ụfọdụ ụmụ irighiri ihe ka dị na steeti otu. Mgbe ọnọdụ okpomọkụ dị na nso nke 410c-440C, n'ihi mmetụta hydrophobic, n'ihi mmetụta dị elu, ọtụtụ ụmụ irighiri akwara na donger nanoparticles na nkesa otu dịtụ. Nile dị ukwuu na denser. E guzobere nchịkọta a hydrophobic na-eduga na mpaghara nke polymer na-eme ihe ngwọta, a na-akpọ nkewa microscopic.
Ọ ga-akọwapụta na nchịkọta Nanoparticle na steeti kwụsiri ike, ọ bụghị nke kwụ chịm. Nke a bụ n'ihi na ọ bụ ezie na ebibiri ihe owuwu mbụ ahụ, a ka nwere hydrogen hydrodoges hydrophic otu dị ka Methyl dị ka methyl na hydroxyl site na njikọta n'etiti. Achịkọta Nanoparticle ruru ogo siri ike ma kwụsie ike n'okpuru njikọ njikọ nke mmetụta abụọ.
Na mgbakwunye, ọmụmụ ahụ chọpụtara na ikpo ọkụ na-enwe mmetụta na-emetụta ndị na-achịkwa ihe ndị e ji agbakọta. Na ngwa ngwa ngwa ngwa, nchịkọta nke eriri molecular dị ngwa, na nha nke nanoparticles dị obere; Ma mgbe iwe dị nro, macromolecules nwere ohere karịa iji mepụta nchịkọta Nanoparticle.
Oge Post: Apr-17-2023