RU2014130594A - Способ производства нанофибриллярных целлюлозных гелей - Google Patents
Способ производства нанофибриллярных целлюлозных гелей Download PDFInfo
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Abstract
1. Способ производства нанофибриллярных целлюлозных гелей, характеризующийся стадиями:(а) подготовки целлюлозных волокон;(b) подготовки по меньшей мере одно наполнителя и/или пигмента;(с) объединения целлюлозных волокон и по меньшей мере одного наполнителя и/или пигмента;(d) фибриллирования целлюлозных волокон в присутствии по меньшей мере одного наполнителя и/или пигмента до тех пор, пока не образуется гель.2. Способ по п. 1, отличающийся тем, что вязкость по Брукфилду полученного нанофибриллярного целлюлозного геля является более низкой, чем вязкость по Брукфилду соответствующей нанофибриллярной целлюлозной суспензии, которая была фибриллирована в отсутствие наполнителей и/или пигментов.3. Способ по любому из пп. 1 или 2, отличающийся тем, что целлюлозные волокна представляют собой волокна, содержащиеся в целлюлозной массе, выбранной из группы, включающей эвкалиптовую целлюлозную массу, еловую целлюлозную массу, сосновую целлюлозную массу, буковую целлюлозную массу, конопляную целлюлозную массу, хлопковую целлюлозную массу и их смеси.4. Способ по любому из пп. 1 или 2, отличающийся тем, что целлюлозные волокна готовят в форме суспензии, предпочтительно имеющей содержание твердых веществ от 0,2 до 35% масс., более предпочтительно от 0,25 до 10% масс., еще более предпочтительно от 0,5 до 5% масс., в особенности от 1 до 4% масс., наиболеепредпочтительно от 1,3 до 3% масс., например, 1,5% масс.5. Способ по любому из пп. 1 или 2, отличающийся тем, что наполнитель и/или пигмент выбирают из группы, включающей осажденный карбонат кальция, природный измельченный карбонат кальция, доломит, тальк, бентонит, глину, магнезит, сатинит, сепиолит; гунтит; диатомит, силикаты; и их смеси.6. Способ по п. 5, отличающий
Claims (17)
1. Способ производства нанофибриллярных целлюлозных гелей, характеризующийся стадиями:
(а) подготовки целлюлозных волокон;
(b) подготовки по меньшей мере одно наполнителя и/или пигмента;
(с) объединения целлюлозных волокон и по меньшей мере одного наполнителя и/или пигмента;
(d) фибриллирования целлюлозных волокон в присутствии по меньшей мере одного наполнителя и/или пигмента до тех пор, пока не образуется гель.
2. Способ по п. 1, отличающийся тем, что вязкость по Брукфилду полученного нанофибриллярного целлюлозного геля является более низкой, чем вязкость по Брукфилду соответствующей нанофибриллярной целлюлозной суспензии, которая была фибриллирована в отсутствие наполнителей и/или пигментов.
3. Способ по любому из пп. 1 или 2, отличающийся тем, что целлюлозные волокна представляют собой волокна, содержащиеся в целлюлозной массе, выбранной из группы, включающей эвкалиптовую целлюлозную массу, еловую целлюлозную массу, сосновую целлюлозную массу, буковую целлюлозную массу, конопляную целлюлозную массу, хлопковую целлюлозную массу и их смеси.
4. Способ по любому из пп. 1 или 2, отличающийся тем, что целлюлозные волокна готовят в форме суспензии, предпочтительно имеющей содержание твердых веществ от 0,2 до 35% масс., более предпочтительно от 0,25 до 10% масс., еще более предпочтительно от 0,5 до 5% масс., в особенности от 1 до 4% масс., наиболее
предпочтительно от 1,3 до 3% масс., например, 1,5% масс.
5. Способ по любому из пп. 1 или 2, отличающийся тем, что наполнитель и/или пигмент выбирают из группы, включающей осажденный карбонат кальция, природный измельченный карбонат кальция, доломит, тальк, бентонит, глину, магнезит, сатинит, сепиолит; гунтит; диатомит, силикаты; и их смеси.
6. Способ по п. 5, отличающийся тем, что наполнитель и/или пигмент выбирают из группы осажденного карбоната кальция, предпочтительно имеющего кристаллическую структуру ватерита, кальцита или арагонита; природного измельченного карбоната кальция, предпочтительно выбранного из мрамора, извести и/или мела; и их смесей.
7. Способ по п. 6, отличающийся тем, что осажденный карбонат кальция представляет собой ультрамелкий, дискретный, призматический, скаленоэдрический или ромбоэдрический осажденный карбонат кальция.
8. Способ по любому из пп. 1 или 2, отличающийся тем, что частицы наполнителя и/или пигмента имеют медианный размер частиц от 0,01 до 15 мкм, предпочтительно от 0,1 до 10 мкм, более предпочтительно от 0,3 до 5 мкм и наиболее предпочтительно от 0,5 до 4 мкм.
9. Способ по любому из пп. 1 или 2, отличающийся тем, что наполнитель и/или пигмент объединяют с диспергирующими агентами, выбранными из группы, включающей гомополимеры или сополимеры поликарбоновых кислот и/или их солей или производных, таких как сложные эфиры, например, на основе акриловой кислоты, метакриловой кислоты, малеиновой кислоты, фумаровой кислоты,
итаконовой кислоты, например, акриламиды или акриловые эфиры, такие как метилметакрилат, или их смеси; полифосфаты щелочных металлов, фосфоновую, лимонную и винную кислоты и их соли или сложные эфиры; или их смеси.
10. Способ по любому из пп. 1 или 2, отличающийся тем, что объединение волокон и, по меньшей мере, одного наполнителя и/или пигмента проводят путем добавления наполнителя и/или пигмента к волокнам или волокон к наполнителю и/или пигменту в одну или несколько стадий.
11. Способ по любому из пп. 1 или 2, отличающийся тем, что наполнитель и/или пигмент и/или волокна добавляют целиком или частями до или во время стадии фибриллирования (d), предпочтительно до стадии фибриллирования (d).
12. Способ по любому из пп. 1 или 2, отличающийся тем, что массовое отношение волокон к наполнителю и/или пигменту из расчета на сухую массу составляет от 1:33 до 10:1, предпочтительно от 1:10 до 7:1, более предпочтительно от 1:5 до 5:1, как правило, от 1:3 до 3:1, еще более предпочтительно от 1:2 до 2:1 и наиболее предпочтительно от 1:1,5 до 1,5:1, например, 1:1.
13. Способ по любому из пп. 1 или 2, отличающийся тем, что фибриллирование проводят с помощью гомогенизатора или фрикционного дефибрера ультратонкого помола.
14. Способ повышения эффективности производства нанофибриллярных целлюлозных гелей, отличающийся тем, что нанофибриллярные гели получают способом по любому из пп. 1-13.
15. Нанофибриллярный целлюлозный гель, полученный способом
по любому из пп. 1-13 или 14.
16. Нанофибриллярный целлюлозный гель по п. 15, отличающийся тем, что эффективность нанофибриллярного целлюлозного геля относительно общего потребления энергии для достижения определенной вязкости по Брукфилду, является более высокой, чем эффективность соответствующих нанофибриллярного целлюлозного геля, фибриллярного в отсутствие наполнителей и/или пигментов, или соответствующего геля, не содержащего наполнителя и/или пигмента.
17. Применение нанофибриллярного целлюлозного геля по любому из пп. 15 или 16 в таких вариантах применения, как материалы-композиты, пластики, краски, каучук, бетон, керамика, клеи, пищевые продукты, или для применения при заживлении ран.
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