Kuburikidza nekuongorora uye muchidimbu mhedzisiro yebvunzo ye cellulose ether muzvitsauko zvitatu, mhedziso huru ndeiyi inotevera:
5.1 Mhedziso
1. Cellulose ether kubviswa kubva mumiti
(1) Zvikamu zvezvishandiso zvishanu zvezvirimwa (hunyoro, dota, hunhu hwehuni, cellulose nehemicellulose) zvakayerwa, uye zvinhu zvitatu zvezvirimwa, pine sawdust negorosi straw, zvakasarudzwa.
uye masagasi ekuburitsa cellulose, uye maitiro ekuburitsa cellulose akagadziriswa. Pasi pemamiriro ekugadzirisa akagadziriswa,
Kuchena kwe lignocellulose, wheat straw cellulose uye bagasse cellulose kwaive pamusoro pe90%, uye goho razvo raive pamusoro pe40%.
(2) Kubva mukuongororwa kwe infrared spectrum, zvinogona kuonekwa kuti mushure mekurapwa, zvigadzirwa zve cellulose zvinotorwa kubva muuswa hwegorosi, masagasse uye pine sawdust
Pa 1510 cm-1 (kutekenyedza kwemapfupa kwe ring ye benzene) uye pa 1730 cm-1 (kutambanudza kubatwa kwe carbonyl C=O isina kusanganiswa)
Pakanga pasina ma peaks, zvichiratidza kuti lignin ne hemicellulose muchinhu chakabviswa zvakabviswa, uye cellulose yakawanikwa yakanga yakachena kwazvo.
Zvinogona kuonekwa kubva ku external absorption spectrum kuti huwandu hwe lignin hunoderera nguva dzose mushure medanho rega rega rekurapwa, uye kubatwa kwe UV kwe cellulose inowanikwa kunoderera.
Mutsetse wespectral wakawanikwa waiva pedyo ne ultraviolet absorption spectral curve ye blank potassium permanganate, zvichiratidza kuti cellulose yakawanikwa yaive yakachena.
Kuongorora kweX-ray diffraction kwakaratidza kuti kristallinity ye cellulose yechigadzirwa chakawanikwa yakawedzera zvikuru.
2. Kugadzirira kwe ether dze cellulose
(1) Kuedza kwechinhu chimwe chete kwakashandiswa kugadzirisa maitiro ekubvisa makristalo e alkali akanyanya kusanganiswa ne pine cellulose;
Kuedza kwe orthogonal uye kuedza kwe single-factor kwakaitwa pakugadzira CMC, HEC neHECMC kubva ku alkali cellulose yemuti wepine, zvichiteerana.
Kugadziriswa. Pasi pemaitiro ekugadzirira akakodzera, CMC ine DS inosvika 1.237, HEC ine MS inosvika 1.657 yakawanikwa.
uye HECMC ine DS ye0.869. (2) Zvichienderana neongororo yeFTIR, zvichienzaniswa ne cellulose yemuti wepine yekutanga, carboxymethyl yakapinzwa zvinobudirira mu cellulose ether CMC.
Mu cellulose ether HEC, boka rehydroxyethyl rakabatana zvinobudirira; mu cellulose ether HECMC, boka rehydroxyethyl rakabatana zvinobudirira
Mapoka eCarboxymethyl nehydroxyethyl.
(3) Zvinogona kuwanikwa kubva mukuongorora kweH-NMR kuti boka rehydroxyethyl rinounzwa muHEC yechigadzirwa, uye HEC inowanikwa nekuverenga kuri nyore.
mwero wekutsiva wemolar.
(4) Zvichienderana neongororo yeXRD, zvichienzaniswa ne cellulose yemuti wepaini yekutanga, cellulose ethers CMC, HEC neHEECMC dzine
Maumbirwo ekristaro ese akachinja kuita cellulose type II, uye crystallinity yakaderera zvakanyanya.
3. Kushandisa paste ye ether ye cellulose
(1) Hunhu hwepakutanga hwepaste yekutanga: SA, CMC, HEC neHECMC zvese zvinwiwa zvepurasitiki, uye
Kusimba kwepseudoplasticity kwe ether nhatu dze cellulose kuri nani pane kweSA, uye kana ichienzaniswa neSA, ine PVI value yakaderera, iyo inonyanya kukodzera kudhinda mapatani akanaka.
Ruva; kurongeka kwekuumbwa kwepaste yemapaste mana ndekwekuti: SA > CMC > HECMC > HEC; kugona kubata mvura kwepaste yekutanga yeCMC,
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Kuenderana kweurea nemunyu unodzivirira kutsvuka kweS kwakafanana neSA, uye kugadzikana kwekuchengetwa kweCMC original paste kuri nani pane SA, asi iyo
Kuenderana kweHEC raw paste kwakaipa kupfuura kweSA;
Kuenderana uye kugadzikana kwekuchengetedza kwe sodium bicarbonate kwakaipa kupfuura SA;
SA yakafanana, asi kugona kwayo kubata mvura, kuenderana kwayo nesodium bicarbonate uye kugadzikana kwekuchengetedza kweHEECMC raw paste kwakaderera pane SA. (2) Kushanda kwekudhinda kwepaste: CMC inobuda ruvara rwakajeka uye kupenya kwayo, kunzwa kwekudhinda, kukurumidza kwekudhinda, nezvimwewo zvese zvakafanana neSA.
uye mwero wekubviswa kwepaste weCMC uri nani pane weSA; mwero wekubviswa kwepaste uye kutaridzika kwekudhindwa kweHEC zvakafanana neSA, asi chitarisiko cheHEC chiri nani pane cheSA.
Huremu hweruvara, kupenya kwemavara uye kukurumidza kwemavara kusvika pakukwesha kwakaderera pane SA; kutaridzika kwekudhinda kweHECMC, kukurumidza kwemavara kusvika pakukwesha kwakafanana neSA;
Chiyero chepaste chakakwira kupfuura SA, asi kugona kwemavara uye kugadzikana kwekuchengetedza kweHECMC kwakaderera pane SA.
5.2 Zvinokurudzirwa
Kubva pakushandiswa kwe5.1 cellulose ether paste inogona kuwanikwa, cellulose ether paste inogona kushandiswa mune inoshanda
Madhayi ekudhinda, kunyanya anionic cellulose ethers. Nekuda kwekuunzwa kwehydrophilic group carboxymethyl, iyo ine nhengo nhanhatu
Kuchinja kweboka rekutanga rehydroxyl paringi, uye negative charge mushure meionization panguva imwe chete, zvinogona kukurudzira kudhaya kwemafibers ne reactive dyes. Zvisinei, zvese,
Kushandiswa kwe cellulose ether printing paste hakuna kunaka, kunyanya nekuda kwehuwandu hwekutsiva kana molar substitution ye cellulose ether.
Nekuda kwekusachinja kwakaderera, kugadzirira cellulose ethers ine dhigirii repamusoro rekutsiva kana dhigirii repamusoro rekutsiva molar kunoda kuongororwa kwakawanda.
Nguva yekutumira: Gumiguru-08-2022