Kuburikidza nekuongorora uye pfupiso yemhedzisiro ye cellulose ether test muzvitsauko zvitatu, mhedziso huru ndeiyi inotevera:
5.1 Mhedziso
1. Cellulose ether kutorwa kubva kuchirimwa zvigadzirwa
(1) Zvikamu zvishanu zvezvirimwa zvakasvibirira (unyoro, madota, huni hwehuni, cellulose uye hemicellulose) zvakayerwa, uye zvinhu zvitatu zvinomiririra zvinomera, pine sawdust uye uswa hwegorosi, zvakasarudzwa.
uye bagasse yekubvisa cellulose, uye maitiro ekubvisa cellulose akagadziridzwa. Under optimized process conditions, the
Kuchena kwakabatana kwe lignocellulose, gorosi mashanga cellulose uye bagasse cellulose zvese zvaive pamusoro pe90%, uye zvibereko zvavo zvese zvaive pamusoro pe40%.
(2) Kubva pakuongororwa kweiyo infrared spectrum, zvinogona kuonekwa kuti mushure mekurapa, zvigadzirwa zve cellulose zvakatorwa kubva muhuswa hwegorosi, bagasse uye pine sawdust.
Pa1510 cm-1 (skeletal vibration yebenzene ring) uye kutenderera 1730 cm-1 (kutambanudza vibration kutorwa kweiyo isiri conjugated carbonyl C=O)
Kwakange kusina nhongonya, zvichiratidza kuti lignin uye hemicellulose muchigadzirwa chakabudiswa zvakabviswa, uye cellulose yakawanikwa yakanga ine kuchena kwepamusoro. nepepuru
Zvinogona kuonekwa kubva kune yekunze absorption spectrum kuti hukama hwemukati hwe lignin hunoramba huchidzikira mushure meimwe nhanho yekurapwa, uye kutorwa kweUV kweiyo yakawanikwa cellulose kunoderera.
Iyo yakawanikwa spectral curve yaive padyo neultraviolet absorption spectral curve ye blank potassium permanganate, zvichiratidza kuti cellulose yakawanikwa yaive yakachena. by X
X-ray diffraction ongororo yakaratidza kuti hukama hwekristaro hwechigadzirwa cellulose hwakavandudzwa zvakanyanya.
2. Kugadzirira kwe cellulose ethers
(1) The single factor experimental yakashandiswa optimize yakanyanyisa alkali decrystallization pretreatment process yepine cellulose;
Orthogonal kuyedza uye imwe-chinhu kuyedza kwakaitwa pakugadzirira kweCMC, HEC uye HECMC kubva papine huni alkali cellulose, zvichiteerana.
optimization. Pasi pematanho akakwana ekugadzirira, CMC ine DS kusvika 1.237, HEC ine MS kusvika 1.657 yakawanikwa.
uye HECMC ine DS ye0.869. (2) Zvinoenderana nekuongorora kweFTIR, zvichienzaniswa neyekutanga pine huni cellulose, carboxymethyl yakaiswa zvakabudirira mu cellulose ether CMC.
Mu cellulose ether HEC, boka re hydroxyethyl rakabudirira kubatanidzwa; mu cellulose ether HECMC, boka rehydroxyethyl rakabatanidzwa zvakabudirira
Carboxymethyl uye hydroxyethyl mapoka.
(3) Inogona kuwanikwa kubva kuH-NMR kuongororwa kuti hydroxyethyl boka rinopinzwa muchigadzirwa HEC, uye HEC inowanikwa nekuverenga kuri nyore.
molar degree yekutsiva.
(4) Maererano nekuongorora kweXRD, zvichienzaniswa neyekutanga pine wood cellulose, cellulose ethers CMC, HEC uye HEECMC ine
Iwo makristasi mafomu ese akachinja kuita cellulose type II, uye iyo crystallinity yakadzikira zvakanyanya.
3. Kushandiswa kwe cellulose ether paste
(1) Zvimiro zvekutanga zvepaste: SA, CMC, HEC uye HECMC ese ari pseudoplastic fluid, uye
Iyo pseudoplasticity yematatu cellulose ethers iri nani pane yeSA, uye kana ichienzaniswa neSA, ine yakaderera PVI kukosha, iyo inonyanya kukodzera kudhinda yakanaka mapatani.
Flower; kurongeka kwehuwandu hwekuumbwa kwepaste yezviputi zvina ndezvi: SA > CMC > HECMC > HEC; iyo mvura inobata simba yeCMC yepakutanga paste,
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Iko kuenderana kweurea uye anti-staining munyu S yakafanana neSA, uye kugadzikana kwekuchengetedza kweCMC yepakutanga paste kuri nani pane SA, asi iyo
Kuenderana kweHEC paste yakasvibirira kwakashata kupfuura yeSA;
Kuenderana uye kuchengetedza kugadzikana kwesodium bicarbonate yakaipa kupfuura SA;
SA yakafanana, asi mvura inobata simba, kuenderana nesodium bicarbonate uye kugadzikana kwekuchengetedza HEECMC raw paste yakaderera pane SA. (2) Kudhinda kuita kwenamira: CMC inooneka ruvara goho uye permeability, kudhinda kunzwa, kudhinda ruvara kukurumidza, nezvimwe zvese zvinofananidzwa neSA.
uye mwero we depaste weCMC uri nani pane weSA; iyo depaste rate uye kudhinda kunzwa kweHEC kwakafanana neSA, asi kutaridzika kweHEC kuri nani kupfuura kweSA.
Ruvara vhoriyamu, permeability uye ruvara kukurumidza kukwiza zvakaderera pane SA; HECMC kudhinda kunzwa, ruvara fastness kuti rubbing akafanana SA;
Iyo paste reshiyo yakakwira kupfuura SA, asi iyo inooneka ruvara goho uye kuchengetedza kugadzikana kweHECMC yakaderera pane SA.
5.2 Zvinokurudzira
Kubva pakushandisa 5.1 cellulose ether paste inogona kuwanikwa, cellulose ether paste inogona kushandiswa mukushanda.
Dye kudhinda mapesi, kunyanya anionic cellulose ethers. Nekuda kwekuunzwa kweiyo hydrophilic boka carboxymethyl, iyo nhanhatu-nhengo
Iko reactivity yeboka rekutanga rehydroxyl pamhete, uye iyo yakaipa charge mushure meionization panguva imwe chete, inogona kukurudzira kudhayiwa kwefiber nedhayi dzinoshanda. Nekudaro, pane zvese,
Kushandiswa kwe cellulose ether printing paste hakuna kunaka zvakanyanya, zvakanyanya nekuda kwedhigirii rekutsinhanisa kana molar kutsiva cellulose ether.
Nekuda kwedhigirii yakaderera yekutsiva, kugadzirira kwe cellulose ethers ine high substitution degree kana high molar substitution degree inoda kuenderera mberi nekudzidza.
Nguva yekutumira: Oct-08-2022