Kudzidza pane cellulose etherification shanduko uye kushandisa reactive dhayi kudhinda paste

Kubva pakauya dhayi dzinoshanda muzana ramakore rapfuura, sodium alginate (SA) yanga iri tsigiro yekudhinda dhayi pamachira edonje.

paste.Zvisinei, nekuenderera mberi nekuvandudzika kwevanhu zvinodiwa pakudhinda, sodium alginate sedhinda rekudhinda haidziviriri kune yakasimba asidhi uye alkali.

Uye iyo structural viscosity idiki, saka kushandiswa kwayo mudenderedzwa (flat) kudhinda kwekrini kunogumira kune imwe nhanho;

Mutengo we sodium alginate uri kuwedzerawo, saka vanhu vakatanga tsvakurudzo pane dzimwe nzira dzayo, cellulose ether ndeimwe yeakakosha.

mutsa.Asi pari zvino chinhu chikuru chinoshandiswa kugadzira cellulose ether ikotoni, kubuda kwayo kuri kuderera, uye mutengo uri kuwedzerawo.

Uyezve, zvinowanzoshandiswa etherifying agents senge chloroacetic acid (yakanyanya muchetura) uye ethylene oxide (carcinogenic) zvakare zvinokuvadza zvakanyanya kumuviri wemunhu uye nharaunda.

Mukuona kweizvi, mupepa rino, cellulose ether yakatorwa kubva mumarara emiti, uye sodium chloroacetate uye 2-chloroethanol yakashandiswa se etherifying agents kugadzirira carboxylate.

Matatu marudzi emafiber: methyl cellulose (CMC), hydroxyethyl cellulose (HEC) uye hydroxyethyl carboxymethyl cellulose (HECMC)

tatucellulose ethersuye SA yakashandiswa kumucheka wekotoni reactive dhayi kudhinda, uye maitiro avo ekudhinda akaenzaniswa uye akadzidzwa.

muchero.Iyo huru yekutsvagisa yemukati meiyo thesis yakakamurwa kuita zvikamu zvitatu:

(1) Bvisa cellulose kubva mumarara emiti.Kuburikidza nekurapwa kwemarara mashanu ezvirimwa (shanga yemupunga, goko remupunga, uswa hwegorosi, pine sawdust.

uye bagasse) yekusarudza uye kuongororwa kwezvikamu (unyoro, madota, lignin, cellulose uye hemicellulose), yakasarudzwa.

Zvinhu zvitatu zvinomiririra chirimwa (pine sawdust, uswa hwegorosi uye bagasse) zvinoshandiswa kuburitsa cellulose, uye cellulose inotorwa.

Nzira yacho yakagadziridzwa;pasi pemamiriro ekugadzirisa maitiro, zvikamu zvepine cellulose, gorosi straw cellulose uye bagasse cellulose zvakawanikwa.

Kuchena kuri pamusoro pe90%, uye goho riri pamusoro pe40%;inogona kuonekwa kubva pakuongorora kwe infrared spectrum uye ultraviolet absorption spectrum iyo tsvina.

Iyo lignin uye hemicellulose inobviswa, uye iyo yakawanikwa cellulose ine kuchena kwepamusoro;inogona kuonekwa kubva ku-X-ray diffraction analysis kuti yakafanana nechirimwa chakasvibirira.

Mukuenzanisa, iyo crystallinity yechigadzirwa chakawanikwa inovandudzwa zvikuru.

(2) Kugadzirira uye hunhu hwe cellulose ethers.Uchishandisa pine huni cellulose yakatorwa kubva mupine sawdust seyakagadzirwa, chinhu chimwe chete chekuyedza chakaitwa.

Iyo yakanyanya alkali decrystallization pretreatment process yepine cellulose yakagadziridzwa;uye nekugadzira orthogonal kuyedza uye single-factor kuyedza, iyo

Maitiro ekugadzirira CMC, HEC uye HECMC kubva papine huni alkali cellulose yakagadziridzwa zvakateerana;

CMC ine DS kusvika 1.237, HEC ine MS kusvika 1.657, uye HECMC ine DS ye0.869 yakawanikwa.Zvinoenderana neFTIR neH-NMR ongororo, mapoka eether anowirirana akaunzwa muzvigadzirwa zvitatu zve cellulose etherification;

Iwo makristasi mafomu eiyo plain ethers CMC, HEC uye HEECMC ese akachinja kuita cellulose type II, uye crystallinity yakadzikira zvakanyanya.

(3) Kushandiswa kwe cellulose ether paste.Mhando nhatu dze cellulose ethers dzakagadzirirwa pasi peyakanyanya maitiro mamiriro akashandiswa mucheka wekotoni

Yakadhindwa ine reactive dhayi uye ichienzaniswa nesodium alginate.Chidzidzo ichi chakawana kuti SA, CMC, HEC uye HECMC ina causative

Mapaste ese ari pseudoplastic fluid, uye pseudoplasticity yematatu cellulose ethers iri nani pane yeSA;kurongeka kwemazinga ekuumbwa kwepaste yezvina zvekunamatira

Ndiyo: SA > CMC > HECMC > HEC.Panyaya yekudhinda mhedzisiro, CMC inooneka ruvara goho uye kupinda, kudhinda ruoko

Sensitivity, kudhinda ruvara kukurumidza, nezvimwewo zvakafanana neSA, uye depaste rate yeCMC iri nani pane SA;

SA yakafanana, asi HEC inooneka ruvara goho, permeability uye rubbing fastness yakaderera pane SA;HECMC kudhinda kunzwa, rub kuramba

Kutsanya kwemavara pakukwesha kwakafanana neSA, uye mwero wekubvisa paste wakakwira kupfuura SA, asi iyo inooneka ruvara goho uye kuchengetedza kugadzikana kweHEECMC kwakaderera pane SA.

Mazwi akakosha: tsvina yekudyara;cellulose;cellulose ether;etherification shanduko;reactive dhayi kudhinda;