Kera Don Hydroxyethyl Cellulose

Hydroxyethyl cellulose (HEC) yawanci ana kera shi ta hanyar sarrafa sinadarai tsakanin cellulose da ethylene oxide, sannan kuma hydroxyethylation. Tsarin ya ƙunshi matakai da yawa, gami da:

1. Shirye-shiryen Cellulose: Tsarin masana'anta yana farawa da keɓewar cellulose daga tushen sabuntawa kamar ɓangaren itace, ginshiƙan auduga, ko wasu filayen shuka. Selulose yawanci ana tsarkakewa kuma ana sarrafa shi don cire datti da lignin, yana haifar da ingantaccen kayan cellulose.
2. Ethoxylation: A cikin wannan mataki, kayan aikin cellulose mai tsabta yana amsawa tare da ethylene oxide a gaban abubuwan da ke haifar da alkaline a ƙarƙashin yanayin sarrafawa. Kwayoyin Ethylene oxide suna ƙara zuwa ƙungiyoyin hydroxyl (-OH) na sarkar polymer cellulose, wanda ya haifar da gabatarwar ƙungiyoyin ethoxy (-OCH2CH2-) akan kashin bayan cellulose.
3. Hydroxyethylation: Bayan ethoxylation, ethoxylated cellulose yana ƙara amsa tare da ethylene oxide da alkali a ƙarƙashin yanayin sarrafawa don gabatar da ƙungiyoyin hydroxyethyl (-OCH2CH2OH) akan sarkar cellulose. Wannan halayen hydroxyethylation yana canza kaddarorin cellulose, yana ba da solubility na ruwa da hydrophilicity ga polymer.
4. Tsarkakewa da bushewa: Sa'an nan kuma ana tsarkake hydroxyethylated cellulose don cire ragowar reactants, masu kara kuzari, da samfuran da aka samu daga gaurayawan dauki. Ana wanke HEC da aka tsarkake, ana tacewa, kuma a bushe don samun foda mai kyau ko granules wanda ya dace da aikace-aikace daban-daban.
5. Grading da Packaging: A ƙarshe, an ƙididdige samfurin HEC bisa ga kaddarorin sa kamar danko, girman barbashi, da tsabta. Sannan ana tattara ta cikin jaka, ganguna, ko wasu kwantena don rarrabawa da adanawa.

Tsarin masana'antu na iya bambanta dan kadan dangane da takamaiman matsayi da buƙatun ingancin samfurin HEC, da kuma ayyukan masana'anta na kowane kamfani. Ana amfani da matakan kula da ingancin yawanci a cikin tsarin samarwa don tabbatar da daidaito, tsabta, da aikin samfurin HEC na ƙarshe.

Ana amfani da HEC a cikin masana'antu daban-daban, ciki har da gine-gine, magunguna, kulawa na sirri, da abinci, saboda kauri, daidaitawa, da abubuwan riƙe ruwa.