Ta hanyar bincike da taƙaitaccen sakamakon gwajin ether cellulose a cikin surori uku, manyan abubuwan da aka yanke sune kamar haka:
5.1 Kammalawa
1. Cellulose ether hakar daga albarkatun shuka
(1) An auna sassan albarkatun shuka guda biyar (danshi, ash, ingancin itace, cellulose da hemicellulose), kuma an zaɓi kayan shuka uku na wakilai, pine sawdust da bambaro na alkama.
da bagasse don cire cellulose, kuma an inganta tsarin hakar cellulose. Ƙarƙashin ingantaccen yanayin tsari, da
Tsaftar dangi na lignocellulose, cellulose bambaro alkama da bagasse cellulose duk sun kasance sama da kashi 90%, kuma yawan amfanin su duk ya haura 40%.
(2) Daga nazarin bakan infrared, ana iya ganin cewa bayan jiyya, samfuran cellulose da aka samo daga bambaro na alkama, bagasse da pine sawdust.
A 1510 cm-1 (ƙwaƙwalwar kwarangwal na zoben benzene) da kuma kusa da 1730 cm-1 (miƙewar girgizar da ba ta haɗa da carbonyl C = O)
Babu kololuwa, yana nuna cewa an cire lignin da hemicellulose a cikin samfurin da aka fitar, kuma cellulose da aka samu yana da tsafta. ta purple
Ana iya gani daga bakan shayarwa na waje cewa abun ciki na dangi na lignin yana raguwa ci gaba bayan kowane mataki na jiyya, kuma shayarwar UV na cellulose da aka samu yana raguwa.
Wurin da aka samu yana kusa da ultraviolet absorption spectral curve na blank potassium permanganate, yana nuna cewa cellulose da aka samu yana da tsafta. ta X
Binciken rarrabuwar kawuna na X-ray ya nuna cewa an inganta kristal na dangi na cellulose samfurin da aka samu sosai.
2. Shiri na ethers cellulose
(1) An yi amfani da gwajin factor guda ɗaya don inganta tsarin ƙaddamar da tsarin pretreatment na pine cellulose;
An gudanar da gwaje-gwajen orthogonal da gwaje-gwaje guda ɗaya akan shirye-shiryen CMC, HEC da HECMC daga itacen pine alkali cellulose, bi da bi.
ingantawa. A karkashin tsarin shirye-shiryen mafi kyau duka, CMC tare da DS har zuwa 1.237, HEC tare da MS har zuwa 1.657 an samu.
da HECMC tare da DS na 0.869. (2) Bisa ga bincike na FTIR, idan aka kwatanta da asali na itacen pine cellulose, an sami nasarar shigar da carboxymethyl a cikin cellulose ether CMC.
A cikin cellulose ether HEC, an samu nasarar haɗa ƙungiyar hydroxyethyl; a cikin cellulose ether HECMC, an samu nasarar haɗa ƙungiyar hydroxyethyl
Carboxymethyl da hydroxyethyl kungiyoyin.
(3) Ana iya samuwa daga nazarin H-NMR cewa an gabatar da ƙungiyar hydroxyethyl a cikin samfurin HEC, kuma ana samun HEC ta hanyar lissafi mai sauƙi.
molar digiri na maye gurbin.
(4) Bisa ga binciken XRD, idan aka kwatanta da asali na Pine itace cellulose, cellulose ethers CMC, HEC da HEECMC suna da
Siffofin crystal duk sun canza zuwa nau'in cellulose II, kuma crystallinity ya ragu sosai.
3. Aikace-aikace na cellulose ether manna
(1) Kaddarorin asali na manna na asali: SA, CMC, HEC da HECMC duk ruwa ne na pseudoplastic, kuma
Pseudoplasticity na ethers cellulose guda uku ya fi na SA, kuma idan aka kwatanta da SA, yana da ƙananan darajar PVI, wanda ya fi dacewa da buga samfurori masu kyau.
Fure; tsari na adadin manna manna guda huɗu shine: SA> CMC> HECMC> HEC; ikon rike ruwa na CMC asali manna,
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Daidaitawar urea da gishiri mai anti-staining S yayi kama da SA, kuma kwanciyar hankali na manne na asali na CMC ya fi SA, amma
Daidaituwar HEC raw manna ya fi muni fiye da na SA;
Daidaitawar daidaituwa da kwanciyar hankali na sodium bicarbonate sun fi SA;
SA yana da kama, amma ƙarfin riƙe ruwa, dacewa tare da sodium bicarbonate da kwanciyar hankali na ajiya na HEECMC raw manna sun kasance ƙasa da SA. (2) Buga aiki na manna: CMC bayyanannen launi yawan amfanin ƙasa da permeability, bugu ji, bugu launi azumi, da dai sauransu duk suna kwatankwacin SA.
kuma yawan raguwar CMC ya fi na SA; yawan rashin jin daɗi da bugu na HEC suna kama da SA, amma bayyanar HEC ya fi na SA.
Ƙarar launi, haɓakawa da saurin launi zuwa shafa sun kasance ƙasa da SA; HECMC bugu Feel, launi saurin zuwa shafa suna kama da SA;
Matsakaicin manna ya fi SA girma, amma bayyanar launi da kwanciyar hankali na HECMC sun kasance ƙasa da SA.
5.2 Shawarwari
Daga aikace-aikacen sakamako na 5.1 cellulose ether manna za a iya samu, cellulose ether manna za a iya amfani da a cikin aiki.
Rini bugu pastes, musamman anionic cellulose ethers. Saboda gabatarwar ƙungiyar hydrophilic carboxymethyl, mai memba shida
Reactivity na rukunin hydroxyl na farko a kan zobe, da kuma mummunan cajin bayan ionization a lokaci guda, na iya haɓaka rini na zaruruwa tare da dyes masu amsawa. Duk da haka, a gaba ɗaya.
Tasirin aikace-aikace na manna ether cellulose ba shi da kyau sosai, musamman saboda matakin maye gurbin ko molar maye gurbin ether cellulose.
Saboda ƙananan digiri na maye gurbin, shirye-shiryen ethers cellulose tare da babban digiri na maye gurbin ko babban digiri na canji na molar yana buƙatar ƙarin nazari.
Lokacin aikawa: Oktoba-08-2022