Njirimara nke cationic Cellulose Ether Solution

Ngwongwo ngwọta dilute nke cationic cellulose ether dị elu (KG-30M) na ụkpụrụ pH dị iche iche ka a na-eji ngwá ọrụ mgbasa ozi laser mụọ, site na radius hydrodynamic (Rh) n'akụkụ dị iche iche, na mgbọrọgwụ pụtara square radius nke ntụgharị. Rg Oke na Rh na-egosi na ọdịdị ya anaghị adịkarị ma ọ dị nso na okirikiri.Mgbe ahụ, site n'enyemaka nke rheometer, a na-amụ ihe ngwọta atọ nke cationic cellulose ethers nke nwere ụgwọ dị iche iche nke ụgwọ dị iche iche, na mmetụta nke ịta ahụhụ, uru pH na njupụta nke ụgwọ ya na njirimara rheological ya.Ka ntinye uche na-abawanye, ihe njiri mara Newton na-ebu ụzọ belata wee belata.Mgbanwe ma ọ bụ ọbụna nlọghachite na-eme, na omume thixotropic na-eme na 3% (oke ntakiri).Njupụta ụgwọ na-agafeghị oke bara uru iji nweta viscosity zero-shear dị elu, na pH enweghị mmetụta dị nta na viscosity ya.

Isi okwu:cationic cellulose ether;morphology;zero shiee viscosity;rheology

Cellulose mmepụta na ha gbanwetụrụ ọtọ polymers e ọtụtụ-eji na ubi nke physiological na sanitary ngwaahịa, petrochemicals, ọgwụ, nri, onye na-elekọta ngwaahịa, nkwakọ, wdg Water-soluble cationic cellulose ether (CCE) bụ n'ihi ya Na ike ndim. ike, a na-ejikarị ya eme ihe na kemịkalụ kwa ụbọchị, karịsịa ncha ntutu, ma nwee ike melite combability nke ntutu isi mgbe ịsachaa ntutu.N'otu oge ahụ, n'ihi ezigbo ndakọrịta ya, enwere ike iji ya na shampoos abụọ n'ime otu na ihe niile.Ọ nwekwara atụmanya ngwa dị mma ma dọta uche nke mba dị iche iche.A kọwo ya na akwụkwọ ndị na-emepụta ihe ngwọta cellulose na-egosipụta àgwà ndị dị ka mmiri Newtonian, mmiri mmiri pseudoplastic, thixotropic fluid na viscoelastic fluid na mmụba nke itinye uche, ma morphology, rheology na mmetụta mmetụta nke cationic cellulose ether na mmiri ngwọta E nwere ole na ole. akụkọ nyocha.Akwụkwọ a na-elekwasị anya na omume rheological nke quternary ammonium modified cellulose aqueous solution, iji nye ntụaka maka ngwa bara uru.

1. Akụkụ nnwale

1.1 Akụrụngwa

Cationic cellulose ether (KG-30M, JR-30M, LR-30M);Ngwaahịa ụlọ ọrụ Canada Dow Chemical, nke Procter & Gamble Company Kobe R&D Center na Japan nyere, nke Vario EL elemental analyzer tụrụ (ụlọ ọrụ German Elemental), ihe nlele ọdịnaya nitrogen bụ 2.7%, 1.8%, 1.0% n'otu n'otu (njupụta ụgwọ bụ 1.9 Meq/g, 1.25 Meq/g, 0.7 Meq/g n'otu n'otu), a na-anwale ya site na German ALV-5000E laser light Scattering instrument (LLS) tụrụ arọ ya nkezi molekụla arọ bụ banyere 1.64×106g / mol.

1.2 Nkwadebe ngwọta

A sachara ihe nlele ahụ site na nzacha, dialysis na ihicha friza.Tulee usoro nke ọnụọgụ atọ n'otu n'otu, ma gbakwunye ngwọta nchekwa ọkọlọtọ na pH 4.00, 6.86, 9.18 iji kwadebe ntinye uche achọrọ.Iji hụ na agbazere ihe nlele ahụ n'ụzọ zuru oke, etinyere ihe ngwọta niile n'elu ihe ndọta maka awa 48 tupu nnwale.

1.3 nha ịgbasa ọkụ

Jiri LLS tụọ arọ-nkezi molekụla arọ nke sample na itughari aqueous ngwọta, na hydrodynamic radius na mgbọrọgwụ pụtara square radius nke ntụgharị mgbe nke abụọ Villi ọnụọgụ na akụkụ dị iche iche,), na infer na a cationic cellulose ether dị na. The aqueous ngwọta site ya ruru ọnọdụ.

1.4 Nleta viscosity na nyocha rheological

Ejiri Brookfield RVDV-III+ rheometer mụọ ihe ngwọta CCE gbadoro anya, na mmetụta nke itinye uche, njupụta ụgwọ na uru pH na akụrụngwa rheological dị ka viscosity sample.Na mkpokọta dị elu, ọ dị mkpa iji nyochaa thixotropy ya.

2. Nsonaazụ na mkparịta ụka

2.1 Nchọpụta na Mgbasa ọkụ

N'ihi usoro ihe omimi ya pụrụ iche, ọ na-esiri ike ịdị n'ụdị otu molekul ọbụna na ihe mgbaze dị mma, ma n'ụdị ụfọdụ micelles kwụsiri ike, ụyọkọ ma ọ bụ mkpakọrịta.

Mgbe e ji microscope na-eme ihe na-eme ka mmiri na-agbaze (~ o.1%) nke CCE hụrụ, n'okpuru ndabere nke ubi cross orthogonal ojii, ntụpọ "kpakpando" na-egbuke egbuke na ogwe ọkụ pụtara.A na-egosipụtakwa ya site na ịgbasa ọkụ, radius hydrodynamic dị ike na pH na akụkụ dị iche iche, mgbọrọgwụ pụtara radius square nke ntụgharị na ọnụọgụ Villi nke abụọ enwetara site na eserese Berry ka edepụtara na Tab.1. Ihe eserese nkesa nke ọrụ radius hydrodynamic nke enwetara na ntinye nke 10-5 bụ tumadi otu ọnụ ọgụgụ kasị elu, ma nkesa dị nnọọ obosara (Fig 1), na-egosi na e nwere njikọ molecular-level na nnukwu mkpokọta na usoro. ;Enwere mgbanwe, na ụkpụrụ Rg/Rb dị gburugburu 0.775, na-egosi na ọdịdị nke CCE na ngwọta dị nso na okirikiri, ma ọ bụghị mgbe niile.Mmetụta pH na Rb na Rg abụghị ihe doro anya.Ihe mgbochi dị na ngwọta nchekwa na CCE na-emekọrịta ihe iji kpuchie ụgwọ dị n'akụkụ ya wee mee ka ọ daa, mana ọdịiche dị iche na ụdị nkwụghachi.Ntụsa ọkụ nke polymers ebubo na-enwe ike imekọrịta mmekọrịta ogologo ogologo yana nnyonye anya mpụga, yabụ enwere ụfọdụ mperi na oke na njiri mara LLS.Mgbe ụmụ irighiri ihe dị ukwuu karịrị 0.02%, a na-enwekarị ọnụ elu okpukpu abụọ na-enweghị ike kewaa ma ọ bụ ọbụna ọtụtụ ọnụ ọnụ na eserese nkesa Rh.Ka ntinye uche na-abawanye, Rh na-abawanye, na-egosi na ọtụtụ macromolecules na-ejikọta ma ọ bụ ọbụna gbakọta.Mgbe Cao et al.jiri ịgbasa ọkụ na-amụ copolymer nke carboxymethyl cellulose na elu-arụ ọrụ macromer, e nwekwara enweghị ikewa abụọ ọnụ ọnụ, otu n'ime ha dị n'etiti 30nm na 100nm, na-anọchi anya nguzobe nke micelles na molekụla larịị, na nke ọzọ The kasị elu Rh bụ dịtụ. nnukwu, nke a na-ewere na ọ bụ nchịkọta, nke yiri ihe ndị e kpebisiri ike na akwụkwọ a.

2.2 Nnyocha gbasara omume rheological

2.2.1 Mmetụta nke itinye uche:Tulee viscosity pụtara ìhè nke KG-30M ngwọta na dị iche iche ịta na dị iche iche shiee udu, na dị ka logarithmic ụdị nke ike iwu equation tụrụ aro site Ostwald-Dewaele, mgbe uka akụkụ adịghị gafere 0,7% , na a usoro nke ogologo ahịrị. nwere ọnụọgụ njikọ linear karịrị 0.99 nwetara.Na ka ntinye uche na-abawanye, uru nke Newton exponent n na-ebelata (ihe niile na-erughị 1), na-egosi mmiri mmiri pseudoplastic doro anya.N'ịbụ ndị ike ịkwa akwa na-akwali, agbụ ndị macromolecular na-amalite ịtọghe na ihu, ya mere viscosity na-ebelata.Mgbe ọnụ ọgụgụ uka dị ukwuu karịa 0.7%, ọnụọgụ ọnụọgụ ọnụọgụ nke enwetara kwụ ọtọ na-ebelata (ihe dịka 0.98), na n na-amalite ịgbanwe ma ọ bụ ọbụna bilie na mmụba nke itinye uche;mgbe ọnụ ọgụgụ dị ukwuu ruru 3% (Fig 2), tebụl The viscosity pụtara ìhè na-ebu ụzọ na-abawanye ma na-ebelata na mmụba nke ọnụ ọgụgụ shear.Usoro ihe omume a dị iche na akụkọ nke ngwọta anionic na cationic polymer ndị ọzọ.The n uru na-ebili, ya bụ, ihe onwunwe na-abụghị Newtonian ebelatawo;Mmiri Newtonian bụ mmiri mmiri viscous, na mwepu intermolecular na-apụta n'okpuru ọrụ nke nrụgide siri ike, ọ nweghịkwa ike nwetaghachi ya;mmiri mmiri na-abụghị Newtonian nwere akụkụ na-agbanwe agbanwe na akụkụ viscous na-enweghị ike iweghachi.N'okpuru ọrụ nke nrụgide siri ike, nkwụsị nke na-apụghị ịgbagha agbagha n'etiti ụmụ irighiri ihe na-eme, ma n'otu oge ahụ, n'ihi na macromolecules na-agbatị ma na-adabere na shear, a na-emepụta akụkụ na-agbanwe agbanwe.Mgbe a na-ewepụ ike dị n'èzí, macromolecules na-achọ ịlaghachi n'ụdị curled mbụ, yabụ uru nke n na-arị elu.Ntinye uche na-aga n'ihu na-abawanye iji mepụta usoro netwọkụ.Mgbe nrụgide ịkwa ahụ dị ntakịrị, a gaghị ebibi ya, ọ bụ naanị nrụrụ na-agbanwe agbanwe ga-eme.N'oge a, a ga-eme ka ọkpụkpụ ahụ dịkwuo mma, viscosity ga-ebelata, uru nke n ga-ebelata;ebe nrụgide ịkwa ahụ na-eji nwayọọ nwayọọ na-abawanye n'oge usoro nha, ya mere n Uru na-agbanwe.Mgbe ọnụ ọgụgụ dị ukwuu ruru 3%, viscosity pụtara ìhè na-ebu ụzọ na-abawanye wee na-ebelata, n'ihi na obere shea na-akwalite nkukota nke macromolecules na-emepụta nnukwu mkpokọta, ya mere viscosity na-ebili, na nrụgide siri ike na-aga n'ihu na-agbaji mkpokọta., viscosity ga-ebelata ọzọ.

Na nyocha nke thixotropy, setịpụ ọsọ (r / min) iji ruo y a chọrọ, mee ka ọsọ ahụ dịkwuo ogologo oge ruo mgbe ọ ruru uru a setịpụrụ, wee daa ngwa ngwa site na ọsọ kachasị elu laghachi na uru mbụ iji nweta ihe kwekọrọ. A na-egosi nrụgide nrụgide, mmekọrịta ya na ọnụ ọgụgụ shear na Fig. 3. Mgbe ọnụ ọgụgụ buru ibu na-erughị 2.5%, mgbanaka elu na mgbada ala na-adaba kpamkpam, ma mgbe ọnụ ọgụgụ buru ibu bụ 3%, ahịrị abụọ ahụ ọ dịghị. ogologo ndakota, na ahịrị ala na-ada n'azụ, na-egosi thixotropy.

A na-akpọ oge ịdabere na nrụgide siri ike dị ka nguzogide rheological.Nguzogide rheological bụ àgwà e ji mara nke mmiri viscoelastic na mmiri mmiri nwere usoro thixotropic.A na-achọpụta na nnukwu y dị n'otu akụkụ nke oke, ngwa ngwa r na-erute nha nha, na ịdabere na oge dị ntakịrị;na obere akụkụ dị ala (<2%), CCE anaghị egosi nguzogide rheological.Mgbe ọnụ ọgụgụ dị ukwuu na-abawanye ruo 2.5%, ọ na-egosi nkwụsịtụ oge siri ike (Fig 4), ọ na-ewe ihe dị ka nkeji 10 iji ruo nha nha, ebe na 3.0%, oge nhata na-ewe 50 nkeji.The ezi thixotropy nke usoro nwere na-eme ka bara uru ngwa.

2.2.2 Mmetụta nke njupụta ụgwọ:a na-ahọrọ ụdị logarithmic nke Spencer-Dillon empirical formula, nke a na-ahọrọ viscosity efu efu, b na-adịgide adịgide n'otu ntinye uche na okpomọkụ dị iche iche, na-abawanye na mmụba nke itinye uche n'otu okpomọkụ.Dị ka usoro iwu ike nke Onogi nakweere na 1966 si dị, M bụ ihe gbasara molecular mass nke polymer, A na B bụ ndị na-adịgide adịgide, na c bụ akụkụ dị nta (%).fig.5 Akụkụ atọ ndị ahụ nwere ntụpọ mgbagha doro anya gburugburu 0.6%, ya bụ, enwere akụkụ dị oke egwu.Ihe kariri 0.6%, viscosity efu efu na-abawanye ngwa ngwa site na mmụba nke itinye uche C. Ntugharị nke ihe atụ atọ ahụ nwere njupụta ụgwọ dị iche iche dị nso.N'ụzọ dị iche, mgbe ọnụ ọgụgụ buru ibu dị n'etiti 0.2% na 0.8%, viscosity efu nke ihe nlele LR na njupụta kacha nta bụ nke kachasị ukwuu, n'ihi na njikọ njikọ hydrogen chọrọ ụfọdụ kọntaktị.Ya mere, njupụta ụgwọ ahụ nwere njikọ chiri anya ma enwere ike ịhazi macromolecules n'usoro n'usoro na kọmpat;site na ule DSC, a na-achọpụta na LR nwere oke crystallization na-adịghị ike, na-egosi njupụta ụgwọ kwesịrị ekwesị, na viscosity efu efu dị elu n'otu ntinye uche ahụ.Mgbe ọnụ ọgụgụ dị nta na-erughị 0.2%, LR bụ nke kacha nta, n'ihi na n'ime ngwọta dilute, macromolecules nwere njupụta dị ala na-enwekarị ike ịmepụta ntụgharị ihu igwe, ya mere viscosity zero-shear dị ala.Nke a nwere ezigbo ntuzi aka n'ihe gbasara ịrụ ọrụ siri ike.

Mmetụta pH 2.2.3: Fig. 6 bụ nsonaazụ a tụrụ na pH dị iche iche n'ime oke nke 0.05% ruo 2.5% oke.Enwere ebe ntụgharị gburugburu 0.45%, mana akụkụ atọ ahụ fọrọ nke nta ka ọ daa, na-egosi na pH enweghị mmetụta doro anya na viscosity efu, nke dị nnọọ iche na mmetụta nke anionic cellulose ether na pH.

3. Nkwubi okwu

Ọ bụ LLS na-amụ ihe ngwọta KG-30M dilute aqueous, na nkesa radius hydrodynamic nwetara bụ otu ọnụ ọgụgụ kasị elu.Site na ịdabere na akụkụ na Rg/Rb ratio, enwere ike ịpụta na ọdịdị ya dị nso na okirikiri, mana ọ bụghị mgbe niile.Maka ngwọta CCE nwere njupụta ụgwọ atọ, viscosity na-abawanye na mmụba nke ntinye uche, mana ọnụọgụ ịchụ nta Newton n mbụ na-ebelata, mgbe ahụ na-agbanwe ma na-ebili;pH nwere obere mmetụta na viscosity, na njupụta ụgwọ dị oke ala nwere ike nweta viscosity dị elu.