Kukora mhedzisiro ye cellulose ether

Cellulose ethersiboka remapolymer anosiyana-siyana anoshandiswa zvakanyanya mumaindasitiri akasiyana siyana ekukora zvivakwa. Kutanga nechisumo che cellulose ethers uye zvimiro zvadzo, bepa iri rinotarisa mumatanho ari kumashure kwekukora kwavo, kujekesa kuti kudyidzana nemamorekuru emvura kunotungamira sei mukusimudzira viscosity. Mhando dzakasiyana dze cellulose ether dzinokurukurwa, dzinosanganisira methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, uye carboxymethyl cellulose, imwe neimwe iine akasiyana makukutu maitiro. mashandisirwo ecellulose ethers mumaindasitiri akadai sekuvaka, mishonga, chikafu, cosmetics, uye kutarisirwa kwevanhu, vachiratidza basa ravo rinokosha mukugadzira chigadzirwa uye maitiro ekugadzira. Pakupedzisira, kukosha kwema cellulose ethers mumaitiro emazuva ano emaindasitiri kunosimbiswa, pamwe chete netarisiro yeramangwana uye kufambira mberi kunogona kuitika mune cellulose ether tekinoroji.

Cellulose ethers inomiririra kirasi yemapolymers anotorwa kubva ku cellulose, biopolymer inowanikwa yakawanda inowanikwa mumadziro esero rezvirimwa. Iine yakasarudzika physicochemical properties, cellulose ethers inoshandiswa zvakanyanya mumaindasitiri akasiyana, kunyanya nekuda kwekukora kwavo. Iko kugona kwema cellulose ethers kuwedzera viscosity uye kunatsiridza rheological zvivakwa kunoita kuti ive yakakosha mukushandisa kwakawanda kubva pakuvaka kusvika kune yemishonga mafomati.

1.Structural Properties yeCellulose Ethers

Usati wanyura mukukora kweiyo cellulose ethers, zvakakosha kuti unzwisise maitiro avo. Cellulose ethers inogadzirwa kuburikidza nekugadzirisa kemikari ye cellulose, kunyanya kusanganisira etherification reactions. Mapoka ehydroxyl (-OH) aripo mumusana we cellulose anotsiviwa nemapoka ether (-OR), apo R inomiririra zvakasiyana-siyana. Kutsiva uku kunotungamira kune shanduko muchimiro chemolecular uye zvimiro zve cellulose, ichipa hunhu hwakasiyana kune cellulose ethers.

Magadzirirwo ezvimiro mu cellulose ethers anokanganisa kunyungudika kwawo, rheological maitiro, uye kukora zvimiro. Iyo dhigirii yekutsiva (DS), iyo inoreva huwandu hweavhareji yemapoka ehydroxyl anotsiviwa paanhydroglucose unit, inoita basa rakakosha mukuona zvimiro zve cellulose ethers. Yepamusoro DS inowanzoenderana nekuwedzera solubility uye kukora kushanda.

2.Mechanisms of Thickening Effect

Iko kukora kwekuita kunoratidzwa ne cellulose ethers kunobva mukudyidzana kwavo nemamorekuru emvura. Kana yakaparadzirwa mumvura, cellulose ethers inopinda hydration, umo mamorekuru emvura anoumba mahydrogen bond nemaatomu eokisijeni ether uye mapoka ehydroxyl emacheni epolymer. Iyi hydration process inotungamira mukuzvimba kwe cellulose ether particles uye kuumbwa kwetatu-dimensional network chimiro mukati meiyo aqueous medium.

Kupinzwa kwe hydrated cellulose ether cheni uye kuumbwa kwehydrogen zvisungo pakati pepolymer mamorekuru kunobatsira mukusimudzira viscosity. Pamusoro pezvo, kudzorwa kwemagetsi pakati pemapoka eether anochajiswa zvisina kunaka kunowedzera kubatsira mukukora nekudzivirira kuvharika kwengetani dzepolymer uye kukurudzira kupararira mune zvinonyungudutsa.

Iyo rheological maitiro e cellulose ether mhinduro inokanganiswa nezvinhu zvakaita se polymer concentration, dhigirii rekutsiva, huremu hwemamorekuru, uye tembiricha. Pakudzika kwakadzika, cellulose ether mhinduro dzinoratidza maitiro eNewtonian, nepo pakudzika kwepamusoro, dzinoratidza pseudoplastic kana shear-kuonda maitiro nekuda kwekuvhiringidzwa kwepolymer entanglements pasi pekunetseka kweshear.

3.Marudzi eCellulose Ethers
Cellulose ethers inobatanidza zvakasiyana-siyana zvezvinobva, imwe neimwe ichipa chaiyo yekukora zvivakwa zvakakodzera kune akasiyana maapplication. Mamwe marudzi anowanzoshandiswa e-cellulose ethers anosanganisira:

Methyl Cellulose (MC): Methyl cellulose inowanikwa ne etherification ye cellulose ine methyl mapoka. Inonyungudika mumvura inotonhora uye inoumba yakajeka, viscous mhinduro. MC inoratidza zvakanakisa kuchengetedza mvura uye inowanzoshandiswa seyakakora mukuvaka, machira, uye zvigadzirwa zvekudya.

Hydroxyethyl Cellulose (HEC): Hydroxyethyl cellulose is synthesi

zed nekuunza mapoka e-hydroxyethyl pane cellulose musana. Inonyungudika mumvura inotonhora uye inopisa uye inoratidza pseudoplastic maitiro. HEC inoshandiswa zvakanyanya mukugadzirwa kwemishonga, zvigadzirwa zvekuchengeta munhu, uye seyakakora mune latex pendi.

Hydroxypropyl Cellulose (HPC): Hydroxypropyl cellulose inogadzirwa ne etherification ye cellulose nemapoka ehydroxypropyl. Inonyungudika mumhando dzakasiyana-siyana dzezvinonyungudutsa, kusanganisira mvura, doro, uye organic solvents. HPC inowanzo shandiswa seyakakora, bhainda, uye firimu-inogadzira mumiriri mumishonga, zvizorwa, uye machira.

Carboxymethyl Cellulose (CMC): Carboxymethyl cellulose inogadzirwa ne carboxymethylation ye cellulose ine chloroacetic acid kana yayo sodium munyu. Iyo inonyanya kunyungudika mumvura uye inoumba viscous mhinduro ine yakanakisa pseudoplastic maitiro. CMC inowana mashandisirwo akawandisa muzvigadzirwa zvekudya, mishonga, machira, uye kugadzira mapepa.

Aya cellulose ethers anoratidza akasiyana makukutu zvimiro, solubility maitiro, uye kuenderana nezvimwe zvinongedzo, zvichiita kuti ive yakakodzera kushandiswa kwakasiyana mumaindasitiri.

4.Kushandiswa kweCellulose Ethers
Izvo zvakasiyana-siyana zvekukora zvimiro zve cellulose ethers zvinovaita kuti zvive zvakakosha mumaindasitiri akasiyana siyana. Mamwe mashandisirwo akakosha e cellulose ether anosanganisira:

Zvishandiso Zvekuvaka: Cellulose ethers inoshandiswa zvakanyanya sekuwedzera mune simende-based zvinhu zvakaita sedhaka, grout, uye plaster kuvandudza kushanda, kuchengetedza mvura, uye kunamatira. Ivo vanoita se rheology modifiers, kudzivirira kupatsanurwa uye kuwedzera mashandiro ezvigadzirwa zvekuvaka.

Pharmaceuticals: Cellulose ethers inowana kushandiswa kwakakura mukugadzirwa kwemishonga semabhinda, disintegrants, uye thickening agents mumapiritsi, capsules, suspensions, uye ophthalmic solutions. Vanovandudza kuyerera kwehupfu, kufambisa kudzvanywa kwepiritsi, uye kutonga kuburitswa kwezvinhu zvinoshanda.

Zvokudya Zvigadzirwa: Cellulose ethers inowanzoshandiswa sekukora, kudzikamisa, uye gelling agents mune zvakasiyana-siyana zvezvigadzirwa zvekudya, kusanganisira sosi, mapfekero, madhiri, uye zvigadzirwa zvemukaka. Ivo vanosimudzira magadzirirwo, viscosity, uye muromo wemuromo uku uchivandudza sherufu kugadzikana uye kudzivirira syneresis.

Zvekuzora uye Kuzvichengeta Pachedu: Cellulose ethers inoshandiswa muzvizoro uye zvigadzirwa zvekuchengeta zvemunhu zvakadai semafuta, mafuta ekuzora, shampoos, uye mushonga wemazino sezvikobvu, emulsifiers, uye firimu-forming agents. Vanopa inodiwa rheological properties, inowedzera kugadzikana kwechigadzirwa, uye inopa yakatsetseka, yakasarudzika manyorerwo.

Paints uye Coatings:Cellulose ethersinoshanda se rheology modifiers mupendi, machira, uye zvinonamira, inovandudza viscosity control, sag kuramba, uye kuumbwa kwemafirimu. Ivo vanobatsira mukugadzikana kwekuumbwa, kudzivirira pigment kugadzika, uye kuwedzera application zvivakwa.

Iko kukora mhedzisiro ye cellulose ethers inoita basa rakakosha mumaindasitiri akasiyana siyana uye magadzirirwo echigadzirwa. Yavo yakasarudzika rheological zvimiro, kuenderana nezvimwe zvinongedzo, uye biodegradability zvinovaita sarudzo dzakasarudzika dzevagadziri munzvimbo dzakasiyana siyana. Sezvo maindasitiri achiramba achiisa pamberi pekuchengetedza uye eco-hushamwari mhinduro, kudiwa kwema cellulose ethers kunotarisirwa kukwira mberi.