Mhedzisiro yezvinotsiva uye Molecular Weight pane Yepamusoro Zvivakwa zveNonionic Cellulose Ether.

Zvinoenderana newashburn's impregnation theory (Penetration Theory) uye van Oss-Good-Chaudhury's musanganiswa dzidziso (Kubatanidza Theory) uye kushandiswa kweiyo columnar wick tekinoroji (Column Wicking Technique), akati wandei asiri-ionic cellulose ethers, senge methyl cellulose Iyo yepamusoro zvimiro zve cellulose, hydroxypropyl cellulose uye hydroxypropyl methylcellulose vakaedzwa. Nekuda kwezvakasiyana zvinotsiva, madhigirii ekutsiva uye mamorekuru uremu eiyi cellulose ethers, masimba avo epamusoro uye zvikamu zvawo zvakasiyana zvakanyanya. Iyo data inoratidza kuti Lewis base ye-non-ionic cellulose ether yakakura kupfuura Lewis acid, uye chikamu chikuru chepamusoro pesimba remahara isimba reLifshitz-van der Waals. Iyo simba repamusoro rehydroxypropyl uye kuumbwa kwayo kwakakura kupfuura iyo yehydroxymethyl. Pasi pechimiro cheiyo inotsiva imwechete uye dhigirii rekutsiva, iyo yepamusoro yemahara simba rehydroxypropyl cellulose inoenzanirana nehuremu hwemamorekuru; nepo simba remahara rehydroxypropyl methylcellulose richienderana nedhigirii rekutsinhanisa uye nekupesana nehupamhi huremu hwemamorekuru. Kuedza kwakawanawo kuti simba repamusoro reiyo substituent hydroxypropyl uye hydroxypropylmethyl mune isiri-ionic cellulose ether inoita kunge yakakura kupfuura simba repamusoro re cellulose, uye kuedza kunoratidza kuti simba repamusoro reiyo yakaedzwa cellulose uye kuumbwa kwayo. zvinoenderana nezvinyorwa.

Mazwi akakosha: nonionic cellulose ethers; zvinotsiva uye madhigirii ekutsiva; molecular uremu; surface properties; wick teknolojia

Cellulose ether iboka guru rezvinyorwa zve cellulose, izvo zvinogona kukamurwa kuva anionic, cationic uye nonionic ethers maererano nemakemikari maitiro eether substituents avo. Cellulose ether zvakare chimwe chezvigadzirwa zvekutanga zvakatsvagirwa uye kugadzirwa mupolymer chemistry. Kusvika pari zvino, cellulose ether yakashandiswa zvakanyanya mumishonga, hutsanana, cosmetics uye indasitiri yechikafu.

Kunyange zvazvo cellulose ethers, yakadai sehydroxymethylcellulose, hydroxypropylcellulose uye hydroxypropylmethylcellulose, yakagadzirwa mumaindasitiri uye zvizhinji zvezvinhu zvavo zvakadzidzwa, simba ravo repamusoro, asidi Alkali-reactive properties haisati yataurwa kusvika ikozvino. Sezvo zvizhinji zvezvigadzirwa izvi zvichishandiswa munzvimbo yemvura, uye maitiro epamusoro, kunyanya maitiro e-acid-base reaction, anogona kukanganisa mashandisirwo azvo, zvakakosha kuti udzidze uye unzwisise pamusoro pemakemikari maitiro eiyi yekutengesa cellulose ether.

Tichifunga kuti sampuli dze cellulose derivatives dziri nyore kwazvo kushandura nekuchinja kwemamiriro ekugadzirira, bepa rino rinoshandisa zvigadzirwa zvekutengesa semasampuli kuratidza simba ravo repamusoro, uye zvichibva pane izvi, pesvedzero yezvinotsiva uye mamorekuru ekurema ezvigadzirwa zvakadaro pamusoro. zvivakwa zvinodzidzwa.

1. Chikamu chekuedza

1.1 Raw zvinhu

Iyo isiri-ionic cellulose ether inoshandiswa mukuyedza ndeye chigadzirwa cheKIMA CHEMICAL CO., LTD,. Iwo masampuli haana kuiswa kune chero kurapwa asati aongororwa.

Tichifunga nezvekuti ma cellulose anobuda akagadzirwa ne cellulose, zvimiro zviviri zviri padyo, uye nzvimbo yepamusoro ye cellulose yakashumwa mumabhuku, saka bepa rino rinoshandisa cellulose semuenzaniso wakajairika. Sampu ye cellulose yakashandiswa yaive kodhi-inonzi C8002 uye yakatengwa kubvaKIMA, CN. Muenzaniso wacho hauna kuiswa kune chero kurapwa panguva yekuedzwa.

Mareagents anoshandiswa mukuyedza ndeaya: ethane, diiodomethane, deionized mvura, formamide, toluene, chloroform. Zvese zvinwiwa zvaive zvekuongorora zvakachena kunze kwemvura yaiwanikwa pakutengesa.

1.2 Nzira yekuedza

Muchiedzo ichi, nzira yekugadzira mbiru yakagamuchirwa, uye chikamu (chinenge 10 cm) chepipette yakajairika ine dhayamita yemukati ye3 mm yakachekwa sechubhu yekoramu. Isa 200 mg yemuenzaniso weupfu muchubhu yekoramu nguva imwe neimwe, wozoizunza kuti ienzane uye woiisa yakamira pasi pegaba regirazi rine dhayamita yemukati ingangoita masendimita matatu, kuitira kuti mvura igone kushambadzwa yega. Weresa 1 mL yemvura kuti iedzwe woiisa mugaba regirazi, uye rekodha nguva yekunyudza t uye kunyudza chinhambwe X panguva imwe chete. Zvese zviedzo zvakaitwa pakamuri tembiricha (25±1°C). Imwe neimwe data iavhareji yezviedzo zvitatu zvinodzokorora.

1.3 Kuverengerwa kwedata rekuyedza

Hwaro hwedzidziso hwekushandiswa kwekoramu wicking nzira yekuyedza simba repamusoro pehupfu iwashburn impregnation equation (Washburn penetration equation).

1.3.1 Kugadziriswa kwecapillary inoshanda radius Reff yemuenzaniso wakayerwa

Paunenge uchiisa iyo Washburn kunyudza formula, mamiriro ekuwana wakazara weti ndeye cos=1. Izvi zvinoreva kuti kana mvura yasarudzwa kuti inyudze mumvura yakasimba kuti iwane kunyorova kwakazara, tinokwanisa kuverenga capillary inoshanda radius Reff yemuenzaniso wakayerwa nekuyedza kureba nekunyudza nguva zvinoenderana nechakakosha nyaya yeWashburn immersion formula.

1.3.2 Lifshitz-van der Waals force calculation yesample yakayerwa

Sekureva kwavan Oss-Chaudhury-Good's kusanganisa mitemo, hukama pakati pekuita pakati pezvinwiwa uye zvakaonda.

1.3.3 Kuverenga kweLewis acid-base simba remasampuli akayerwa

Kazhinji, iyo acid-base zvimiro zvezvakaoma zvinofungidzirwa kubva kune data rakaiswa nemvura uye formamide. Asi munyaya ino, takaona kuti hapana dambudziko pakushandisa iyi peya yepolar liquids kuyera cellulose, asi mukuedzwa kwe cellulose ether, nokuti kunyudzwa kwepamusoro pepolar solution system yemvura / formamide mu cellulose ether yakaderera zvikuru. , zvichiita kuti nguva yekurekodha iome zvikuru. Naizvozvo, iyo toluene/chloroform solution system yakaunzwa neChibowsk yakasarudzwa. Sekureva kwaChibowski, toluene/chloroform polar solution system zvakare isarudzo. Izvi zvinodaro nekuti zvinwiwa zviviri izvi zvine acidity yakakosha uye alkalinity, semuenzaniso, toluene haina Lewis acidity, uye chloroform haina Lewis alkalinity. Kuti tiwane ruzivo rwakatorwa ne toluene/chloroform solution system padhuze neyakakurudzirwa polar solution system yemvura/formamide, tinoshandisa mapolar liquid masisitimu maviri aya kuyedza cellulose panguva imwe chete, tobva tawana kuwedzera kunoenderana kana contraction coefficients. usati washandisa Iyo data yakawanikwa nekuisa pamuviri cellulose ether ne toluene/chloroform iri padyo nemhedziso yakawanikwa yemvura/formamide system. Sezvo cellulose ethers ichitorwa kubva muselulosi uye paine chimiro chakada kufanana pakati pezviviri, iyi nzira yekufungidzira inogona kuve inoshanda.

1.3.4 Kuverengera kwesero pasi pesimba remahara

2. Migumisiro uye Hurukuro

2.1 Cellulose chiyero

Sezvo mhedzisiro yedu yebvunzo pamasampula akajairwa ecellulose yakaona kuti data iri riri muchibvumirano chakanaka neakataurwa mumabhuku, zvine musoro kutenda kuti mhedzisiro yebvunzo pa cellulose ether inofanirwawo kutariswa.

2.2 Miedzo mhinduro uye hurukuro ye cellulose ether

Munguva yekuyedzwa kwe cellulose ether, zvakanyanya kuoma kurekodha kureba kwekunyudza uye nguva nekuda kwekudzika kwakanyanya kunyudza kureba kwemvura uye formamide. Nokudaro, pepa rino rinosarudza toluene/chloroform solution system seimwe nzira yekugadzirisa, uye inofungidzira Lewis acidity ye cellulose ether zvichienderana nemigumisiro yekuedza yemvura / formamide uye toluene / chloroform pa cellulose uye hukama hwakaenzana pakati pemagadzirirwo maviri ekugadzirisa. uye alkaline simba.

Kutora cellulose semuenzaniso wakajairika, nhevedzano yeasidhi-base maitiro e cellulose ethers inopihwa. Sezvo mhedzisiro yekumirisa cellulose ether ine toluene/chloroform yakaedzwa zvakananga, zvinogutsa.

Izvi zvinoreva kuti rudzi uye huremu hwema molecular ezvinotsiva zvinokanganisa acid-base zvimiro zve cellulose ether, uye hukama pakati pezviviri zvinotsiva, hydroxypropyl uye hydroxypropylmethyl, pane acid-base zvivakwa zve cellulose ether uye huremu hwemamorekuru hwakapesana zvachose. Asi zvinogona zvakare kuenderana nenyaya yekuti MPs inhengo dzakasanganiswa.

Sezvo zvinotsiva zveMO43 neK8913 zvakasiyana uye zvine huremu hwakafanana, semuenzaniso, chinotsiva chekare hydroxymethyl uye chinotsiva chekupedzisira ihydroxypropyl, asi huremu hwezvose zviri zviviri i100,000, saka zvinoreva zvakare kuti chirevo chehuremu hwema molecular Mumamiriro ezvinhu, S + uye S- yeboka re hydroxymethyl inogona kuva duku kudarika boka re hydroxypropyl. Asi dhigirii rekutsiva rinogoneka zvakare, nekuti dhigirii rekutsiva kweK8913 rinenge 3.00, nepo MO43 iri 1.90 chete.

Sezvo dhigirii yekutsiviwa uye inotsiva yeK8913 neK9113 yakafanana asi chete molecular uremu hwakasiyana, kuenzanisa pakati pezviviri zvinoratidza kuti S + ye hydroxypropyl cellulose inoderera nekuwedzera kwema molecular uremu, asi S- inowedzera pane zvinopesana. .

Kubva muchidimbu chemhedzisiro yekuedzwa kwesimba repamusoro reese cellulose ether uye zvikamu zvawo, zvinogona kuonekwa kuti ingave cellulose kana cellulose ether, chikamu chikuru chesimba ravo repamusoro isimba reLifshitz-van der Waals, rinoverengera. anenge 98% ~ 99%. Uyezve, mauto eLifshitz-van der Waals eiyi nonionic cellulose ethers (kunze kwe MO43) zvakare akanyanya kukura kupfuura ayo e cellulose, izvo zvinoratidza kuti etherification process ye cellulose inzira zvakare yekuwedzera Lifshitz-van der Waals masimba. Uye kuwedzera uku kunoita kuti simba repamusoro re cellulose ether rive rakakura kudarika re cellulose. Chiitiko ichi chinonakidza nekuti ma cellulose ether aya anowanzoshandiswa mukugadzira ma surfactants. Asi iyo data yakakosha, kwete chete nekuti data nezve referensi chiyero sampuli yakaedzwa muchiyedzo ichi inopindirana zvakanyanya nehukoshi hwakataurwa mumabhuku, iyo data nezve referensi chiyero sampuli inopindirana zvakanyanya nehukoshi hwakataurwa mumabhuku, nekuti muenzaniso: ese aya cellulose Iyo SAB ye ethers yakanyanya kudiki pane iyo cellulose, uye izvi zvinokonzerwa nehukuru hwavo Lewis mabhesi. Pasi pechimiro cheiyo inotsiva imwechete uye dhigirii rekutsiva, iyo yepamusoro yemahara simba rehydroxypropyl cellulose inoenzanirana nehuremu hwemamorekuru; nepo simba remahara rehydroxypropyl methylcellulose richienderana nedhigirii rekutsinhanisa uye nekupesana nehupamhi huremu hwemamorekuru.

Pamusoro pezvo, nekuti ma cellulose ether ane hombe SLW pane cellulose, asi isu tinotoziva kuti dispersibility yavo iri nani pane cellulose, saka zvinogona kutariswa kuti chikamu chikuru cheSLW chinoumba nonionic cellulose ethers inofanira kunge iri London force.

3. Mhedziso

Zvidzidzo zvakaratidza kuti rudzi rwekutsiva, dhigirii rekutsiva uye huremu hwemamorekuru zvine simba guru pamusoro pesimba repamusoro uye kuumbwa kweiyo isiri-ionic cellulose ether. Uye mhedzisiro iyi inoita kunge ine inotevera kujairana:

(1) S+ ye-non-ionic cellulose ether idiki pane S-.

(2) Simba repamusoro renonionic cellulose ether rinotungamirirwa neLifshitz-van der Waals force.

(3) Huremu hwemamorekuru uye zvinotsiva zvine simba pamusoro pesimba reasiri-ionic cellulose ethers, asi zvinonyanya kuenderana nerudzi rwezvinotsiva.

(4) Pasi pechigadziro cheiyo imwe chete inotsiva uye dhigirii rekutsiva, iyo yepamusoro yemahara simba rehydroxypropyl cellulose inoenderana nehuremu hwemamorekuru; nepo simba remahara rehydroxypropyl methylcellulose richienderana nedhigirii rekutsinhanisa uye nekupesana nehupamhi huremu hwemamorekuru.

(5) Iyo etherification process ye cellulose inzira umo simba reLifshitz-van der Waals rinowedzera, uye zvakare inzira iyo Lewis acidity inodzikira uye Lewis alkalinity inowedzera.