Mkpụrụ osisi ether bụ polymer na-eme site na sellilose site na ngbanwe kemịkal. Celligul eather bụ ihe na-atọ ụtọ nke sellose. Mmepụta nke cellosuse eather dị iche na polymers sịntetik. Ihe kachasị mkpa bụ cellulose, polymer polymer. N'ihi ihe owuwu sellose eke, ihe cellulose n'onwe ya enweghị ikike imeghachi omume ndị ọrụ Ileration. Agbanyeghị, mgbe ọgwụgwọ nke onye na-ahụ maka ọzịza, a na-ejikọ hydrogen n'etiti ụdọ mmiri na agbụ nke hydroxyl na-emegharị alkali sellulose. Nweta celllose ether.
Ngwongwo nke otutu ndi mmadu na-adabere na udi, onu ogugu na nkesa ndi nweburu. Nkewa nke eyers cellususe na-esitekwa n'ụdị ndị nnọchianya, ogo nke ether, ngụgụ na akụrụngwa metụtara ya. Dabere na ụdị nke ndị a machibidoro na molecular yinye, enwere ike ekewa ya na mono ether na agwakọta. Anyị na-eji MC dị ka mone eat, na HPMC dị ka agwakọta. Methyl cellulose eather mc bụ ngwaahịa mgbe hydroxy n'otu n'otu celluse nke sellose ke celloxy. Usoro nhazi ahụ bụ [Co H7O2 (Oh) 3-H (OCH3) H] X Ọ B AR A NA-EGO NA-EGO NA-EGO NA-EGO NA-EGO NA-EGO NA-EGO NA-EKWU EGO Usoro nhazi ahụ bụ [c6H7O2 (oh) 3-mn (och2ch (oh) cheters na-ejikarị ma ree ya n'ahịa.
N'usoro nke solubality, enwere ike ekewa ya ionic na nke na-abụghị nke ionic. Ahịhịa mkpụrụ ndụ celluble na-abụghị nke na-egbu egbu na-kachakarị nke usoro usoro abụọ nke alkyl na hydroxyalky. A na-eji cmc cmc na-eme ihe na-egbu egbu, mbipụta na ihicha akwa, nri na ihe nyocha mmanụ. Na-abụghị nke Ionic, HPMC, wdc, wdg. Ejiri dị ka onye na-eche nche, mmiri na-ejigide ya, nkwụchi elu, dispent na ihe nkiri na-eme ka onye na-ahụ maka ihe nkiri.
Njide mmiri nke celher
N'ime mmepụta ihe owuwu ụlọ, ngwa ngwa akpọnwụ akpọnwụ, cellulose eling skay, ọkachasị na ngwa agha nke ngwa agha (nke a gbanwetụrụ), ọ bụ akụrụngwa dị mkpa ma dị mkpa.
Ọrụ dị mkpa nke mmiri-soluble cellulose ether na-enwe akụkụ atọ, otu bụ ikike nnabata, nke ọzọ bụ mmetụta na-agbanwe agbanwe, na nke atọ bụ mmekọrịta ya na ciment.
Igwe eji egbochi mmiri nke sel na-adabere na mmiri mmiri dị na mbara ihu, ihe ngwa agha, ọkpụrụkpụ nke ngwa agha, na oge nrụpụta nke ihe eji eme ya. Njide mmiri nke celhulose ether n'onwe ya na-esite na solubality na akpịrị ịkpọasị nke sel na-efe efe. A maara nke ọma na ọ bụ ezie na mkpụrụ ndụ cellulose nwere ọnụ ọgụgụ dị ukwuu nke ukwuu, ọ naghị soluble na mmiri, n'ihi na ihe owuwu sellulose nwere oke nke mkpu ákwá dị elu. Ikike hydration nke otu hydroxy ezughi iji kpuchie eriri hydrogen siri ike na van der Waals na-agabiga n'etiti ụmụ irighiri ihe. Ya mere, ọ bụ naanị inyocha ma ọ naghị agbari na mmiri. Mgbe a na-ewebata dochie ya n'ime akwara akwara, ọ bụghị naanị na a na-ebibi hydrogen yinye, kamakwa njikọta hydrogen hydrogen a na-emebi emebi n'ihi akara nke a na-ejikọ ọnụ. Nnukwu ihe dị ukwuu n'etiti ụmụ irighiri ihe. Ka ukwuu n'ebe dị anya. Kachasị mmetụta nke imebi agbụ hydrogen, cellulose ether na-agbanye mmiri mgbe ikuku lattice latttose na-agbasa ma ngwọta ndị na-abanye, na-akpụzi ngwọta dị elu. Mgbe ọnọdụ okpomọkụ ahụ na-awa, hydration nke polymer na-emebi emebi, na mmiri dị n'agbatakwa mmiri dị n'etiti agbụ. Mgbe mmetụta akpịrị zuru ezu, ụmụ irighiri akwara na-amalite nchịkọta, na-akpụzi gel nke netwọkụ atọ ma kechie ya. Ihe ndị na-emetụta oke mmiri nke ngwa agha gụnyere viscosis nke sel, ego ahụ gbakwụnyere, ọnụ ọgụgụ nke irimma na iji okpomọkụ.
The dị elu viscosity nke cellulose eather, ka mma iji njigide mmiri, na elu viscosity nke polymer ngwọta. Dabere na ogo molecular (ogo polymerization) nke polymezation) nke polyle ogologo nke usoro molecular na ụdị nke ndị nnọchi anya na ọnụọgụ nke ndị na-eme viccosites.
[η] = km α
[·] vinsic vinsicty nke polymer ngwọta
mymer mololular
α polymer agwa
Ọdịdị viccosite
Viccosity nke polymer ngwọta na-adabere na mmiri molecular nke polymer. Viscosity na ịta nke sel na-ahụ maka itinye akwụkwọ na ngwa dị iche iche. Ya mere, onye ọ bụla na-akụ mkpụrụ osisi na-akọwapụta ọtụtụ viscosis dị iche iche, mgbanwe nke viscosity bụ nke mepụtara site na ngbanwe nke cellulose, ya bụ, na-agbaji ụdọ akwara cellular.
Enwere ike ịhụ ya site na ọgụgụ 1.2 na ọnụ ọgụgụ ka ukwuu nke cellulose ether na-agbakwunye na ngwa ọgụ, na elu viscosity, na arụmọrụ njigide mmiri.
Maka urughuru size, onye na-ahụkarị mmiri, mma njigide mmiri na-ahụ ọgụgụ nke 3. Mgbe nnukwu osisi nke cellulose nke cellulose na-egbochi ihe ahụ iji gbochie moducating mmiri. Mgbe ụfọdụ, ọ na-enweghị ike ịgbasa ma gbasaa ma belata ogologo oge, na-akpụzi ihe ngwọta igwe ojii ma ọ bụ agglomeration. Ọ na - emetụta oke njigide nke other ya, na sosoubles bụ otu n'ime ihe maka ịhọrọ ether.
Ndị na-eto eto na thixotropy nke cellulose ether
Ọrụ nke abụọ nke cellulose ether - na-adabere: ogo nke polymerization nke cellulose eather, ihe ngwọta, ọnụego ya, okpomọkụ na ọnọdụ ndị ọzọ. Ihe onwunwe nke ihe ngwọta nke ihe ngwọta bụ pụrụ iche na alkyl Cellulose na agbanwee. Njirimara gelenation bu ihe metụtara ogo nke nbanye, itinye uche na ihe mgbakwunye. N'ihi na hydroxyalkyl na-eme ka usoro nke GErivatives, yana akụrụngwa GEN na ogo mgbanwe nke hydroxyalli. Maka MC na HPMC nke nwere viscosity viscosity, ihe ngwọta ịta ahụhụ, 5% nwere ike ịkwadebe maka viscosity Mc na HPMC, na HPMC, na HPMC, na-abụkarị usoro nhazi ọkwa nke sel sel na-emecha 1% -2% ngwọta. Olugular-ara na-egbu egbu nwere arụmọrụ dị elu. Polymers nwere ihe dị iche iche enwere oke nwere viscosities dị iche iche na otu ihe ngwọta. Ogo dị elu. Enwere ike nweta ihe a lekwasịrị anya site na ịgbakwunye nnukwu molecular nke dị ala. Visatyhụ ya enweghị obere ịdabere na ọnụego ya, na visciosity nke dị elu na-erute viscosity, yana mgbakwunye achọrọ dị obere, na visces na-adabere na arụmọrụ dị iche iche. Ya mere, iji mezuo ụfọdụ mkpụrụ osisi, ụfọdụ mkpụrụ osisi cellulose (ịta nke ihe ngwọta) na usoro viscosity ga-ekwerịrị. The gel nke ngwọta nke ihe ngwọta na-ebelata ihe ngwọta na mmụba nke ngwọta nke ihe ngwọta, na gels na ụlọ okpomọkụ mgbe ị rutere ụfọdụ itinye uche. GELAtion uche nke hpmc dị elu na ụlọ okpomọkụ.
Enwere ike idozigharị ya site na ịhọrọ nha nha ma na-ahọrọ ndị a na-enwe usoro mgbanwe cellose na ogo dị iche iche. Ndozi a na-akpọ bụ iwebata ogo ụfọdụ nke ihe nnọchianya Hydroxyallth na otu ọkpụkpụ nke MC. Site na ịgbanwe ụkpụrụ nke ihe abụọ ahụ, ya bụ, nke ahụ bụ, DS na MS nke dị iche iche banyere Methoxy na Hydroxyalky dị na-ekwu. Enwere ike ịnweta usoro arụmọrụ dị iche iche nke mkpụrụ osisi cellulose site na ịgbanwe ụkpụrụ nbanye nke ndị nwe ya.
Site na Corice 4 anyị nwere ike ịhụ mmekọrịta dị n'etiti agbanwe agbanwe na mgbanwe. Ihe mgbakwunye nke cellose na eserese 5 na-emetụta mmiri mmiri nke ngwa agha nke ngwa agha ahụ ma gbanwee ohere mmiri na-ciment, nke bụ mmetụta na-atọ ụtọ. The dị elu usoro ọgwụgwọ ahụ, oriri mmiri ka ukwuu.
Agbụrụ mkpụrụ osisi cellugul ejiri na mmiri ụlọ ga-agbaze ngwa ngwa ma nyekwa ntụkwasị obi kwesịrị ekwesị maka sistemụ ahụ. Ọ bụrụ na enyere ụfọdụ ihe eji eme mmiri, ọ ka na-aghọ ihe mgbochi na colloidal, nke bụ onye na-adịghị mma ma ọ bụ ngwaahịa adịghị mma.
Enwekwara mmekọrịta dị mma n'etiti nha anya nke cent mado na usoro nke cellulose ether. Mkpụrụ ndụ mkpụrụ osisi e nwere ike ịba ụba vishosity nke ngwa agha. The buru ibu, ihe doro anya ka mmetụta pụtara ìhè, lee eserese 6.
Nnwale ọdịdị nke ọdịiche dị elu nke dị elu na-esiri ike nwere nnukwu Thixtotropy, nke bụkwa isi agwa nke sel. Ihe ngwọta osisi nke polymers nke poly-ụdị polymers na-enwekarị pseudoplastic na-abụghị thixotropic na-acha uhie uhie n'okpuru okpomọkụ ha, mana Njirimara Flowtonian na-adị ọnụ. Pseudoplastity na-abawanye na oke molecular ma ọ bụ ịta ahụhụ cellulose ether, n'agbanyeghị ụdị rụrụ arụ na ogo nke dochie. Ya mere, usoro cellulose nke otu viscosit, agbanyeghị MC, HPMC, ga-egosi otu ihe ndị na-egbu egbu ihe dị ka ogologo ịta na ọnọdụ okpomọkụ na-echekwa. A na-guzobe gels mgbe a zụlitere okpomoku, ma buru oke ibu na-eme. Elu elu na-egosi ndị na-ahụ maka viocosity na-egosi ThoxOtropy ọbụna n'okpuru okpomọkụ gel. Ihe onwunwe a dị oke uru maka ndozi nke ịka nká na ịka nká nke ụlọ ngwa agha. Ọ dị mkpa ịkọwa ya ebe a na elu viscosity nke sel, ma dị elu mmiri dị elu, na nke kwekọrọ na-agbadata na njikwa ya na arụmọrụ ihe ọkụkụ. Nga ahụ dị elu, ihe doro anya na nsonaazụ ndị na-emetụ na ngwa agha, mana ọ bụghị kpam kpam. Fọdụ ndị na-ajụ ase na ala dị ala, mana mgbanwe ahụ gbanwetụrụ na-arụ ọrụ ka mma iji melite ike nke ngwa agha. Site na mmụba nke viscosity, njigide mmiri nke cellulose na-eme ka ọ dị mma.
Oge post: Feb-18-2023